Brother BAS-311G User Manual

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SERVICE MANUAL

BAS-311G BAS-326G

Please read this manual before making any adjustments.

DIRECT DRIVE

PROGRAMMABLE ELECTRONIC PATTERN SEWER

This service manual is intended for BAS-311G, BAS-326G; be sure to read the BAS-311G, BAS-326G instruction manual

before this manual.

Carefully read the “SAFETY INSTRUCTIONS” below and the whole of this manual to understand this product before you

start maintenance.

As a result of research and improvements regarding this product, some details of this manual may not be the same as those

for the product you purchased.

If you have any questions regarding this product, please contact a Brother dealer.

SAFETY INSTRUCTIONS

[1] Safety indications and their meanings

This service manual and the indications and symbols that are used on the machine itself are provided in order to ensure

safe operation of this machine and to prevent accidents and injury to yourself or other people.

The meanings of these indications and symbols are given below.

Indications

DANGER

The instructions which follow this term indicate situations where failure to follow the instructions may result in death or serious injury.

CAUTION

Symbols

･･････

The instructions which follow this term indicate situations where failure to follow the instructions could cause injury when using the machine or physical damage to equipment and surroundings.

This symbol ( ) indicates something that you should be careful of. The picture inside the triangle indicates the nature of the caution that must be taken. (For example, the symbol at left means “beware of injury”.)

This symbol ( ) indicates something that you must not do.

This symbol ( ) indicates something that you must do. The picture inside the circle indicates the nature of the thing that must be done. (For example, the symbol at left means “you must make the ground connection”.)

BAS-311G, BAS-326G

[2] Notes on safety

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.

DANGER

CAUTION

Environmental requirements

Use the sewing machine in an area which is free from sources of strong electrical noise such as electrical line noise or static electric noise. Sources of strong electrical noise may cause problems with correct operation.

Any fluctuations in the power supply voltage should be within ±10% of the rated voltage for the machine. Voltage fluctuations which are greater than this may cause problems with correct operation.

The power supply capacity should be greater than the requirements for the sewing machine's power consumption. Insufficient power supply capacity may cause problems with correct operation.

The pneumatic delivery capability should be greater than the requirements for the sewing machine's total air consumption. Insufficient pneumatic delivery capability may cause problems with correct operation.

Installation

Machine installation should only be carried out by a qualified technician.

Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done.

The sewing machine weighs approximately 88 kg. The installation should be carried out by two or more people.

Do not connect the power cord until installation is complete. If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.

Hold the machine head with both hands when tilting it back or returning it to its original position. Furthermore, do not apply excessive force when tilting back the machine head. The sewing machine may become unbalanced and fall down, and serious injury or damage to the sewing machine may result.

Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious electric shock, and problems with correct operation may also occur.

The ambient temperature should be within the range of 5°C to 35°C during use. Temperatures which are lower or higher than this may cause problems with correct operation.

The relative humidity should be within the range of 45% to 85% during use, and no dew formation should occur in any devices. Excessively dry or humid environments and dew formation may cause problems with correct operation.

In the event of an electrical storm, turn off the power and disconnect the power cord from the wall outlet. Lightning may cause problems with correct operation.

All cords should be secured at least 25 mm away from any moving parts. Furthermore, do not excessively bend the cords or secure them too firmly with staples, otherwise there is the danger that fire or electric shocks could occur.

Install the safety covers to the machine head and motor.

If using a work table which has casters, the casters should be secured in such a way so that they cannot move.

Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into your eyes or onto your skin. If the oil and grease get into your eyes or onto your skin, inflammation can result. Furthermore, do not drink or eat the lubricating oil or grease. They may cause diarrhea or vomiting. Keep the oil out of the reach of children.

BAS-311G, BAS-326G

CAUTION

Sewing

This sewing machine should only be used by operators who have received the necessary training in safe use beforehand.

The sewing machine should not be used for any applications other than sewing.

Be sure to wear protective goggles when using the machine. If goggles are not worn, there is the danger that if a needle breaks, parts of the broken needle may enter your eyes and injury may result.

Turn off the power switch at the following times. If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.

• When threading the needle

• When replacing the bobbin and needle

• When not using the machine and when leaving the

machine unattended

Cleaning

Turn off the power switch before carrying out cleaning. If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.

If using a work table which has casters, the casters should be secured in such a way so that they cannot move.

Attach all safety devices before using the sewing machine. If the machine is used without these devices attached, injury may result.

Do not touch any of the moving parts or press any objects against the machine while sewing, as this may result in personal injury or damage to the machine.

If an error occurs in machine operation, or if abnormal noises or smells are noticed, immediately turn off the power switch. Then contact your nearest Brother dealer or a qualified technician.

If the machine develops a problem, contact your nearest Brother dealer or a qualified technician.

Maintenance and inspection

Maintenance and inspection of the sewing machine should only be carried out by a qualified technician.

Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system.

Turn off the power switch and disconnect the power cord before carrying out the following operations. If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.

• Inspection, adjustment and maintenance

• Replacing consumable parts such as the rotary

hook

Disconnect the air hoses from the air supply and wait for the needle on the pressure gauge to drop to “0” before carrying out inspection, adjustment and repair of any parts which use the pneumatic equipment.

BAS-311G, BAS-326G

If the power switch needs to be left on when carrying out some adjustment, be extremely careful to observe all safety precautions.

Use only the proper replacement parts as specified by Brother.

If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that they operate correctly before using the machine.

Any problems in machine operation which result from unauthorized modifications to the machine will not be covered by the warranty.

iii

[3] Warning labels

The following warning labels appear on the sewing machine. Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer.

1 2

Motor cover

Be careful not to get your hand caught when tilting back the machine head and returning it to its original position.

Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious electric shock, and problems with correct operation may also occur.

Direction of operation

Tension release solenoid cover

Inner cover L Outer cover Fixed cover L

Motor cover L

Eye guard

Finger guard

Gas spring support cover

Safety devices

Devices such as eye guard, finger guard, thread take-up cover, motor cover, tension release solenoid cover, inner cover, outer cover, fixed cover and gas spring support cover

Thread take-up cover

Inner cover R Outer cover

Fixed cover R

Motor cover R

5222Q

4905Q

BAS-311G, BAS-326G

1. SPECIFICATIONS ............................. 1

2. FUNCTION SETTINGS...................... 2

2-1. List of special functions when power is

turned on ................................................... 2

2-2. List of advanced functions......................... 3

2-3. Memory switch setting method

(Advanced) .............................................. 4

2-4. List of memory switch settings .................. 5

2-5. Setting the work clamp mode.................... 14

2-6. Stitch counter checking method ................ 15

2-7. Error history checking method .................. 16

2-8. Input checking method .............................. 17

2-9. Output checking method ........................... 20

2-10. Software version checking method ........... 22

3. READING / WRITING DATA............. 23

3-1. Handling data ............................................ 23

3-2. Notes on handling CF cards

(sold separately) ...................................... 24

3-3. Structure of a CF card folder..................... 24

3-4. Data read/write mode................................ 25

3-5. Reading sewing data from CF cards ......... 26

3-6. Writing sewing data to CF cards ............... 27

3-7. Reading memory switch data from

CF cards.................................................... 28

3-8. Writing memory switch data to CF cards... 28

3-9. Reading user program data from

CF cards.................................................... 29

3-10. Writing user program data to CF cards ..... 29

3-11. Updating the control program.................... 30

3-12. Writing error log data to CF card ............... 31

3-13. Reading sewing data from floppy disks..... 31

3-14. Writing sewing data to floppy disks ........... 32

3-15. Reading extended option output data

from a CF card .......................................... 33

3-16. Writing extended option output data

to CF cards................................................ 34

3-17. Reading extended option output data

from floppy disks ....................................... 34

4. MECHANICAL DESCRIPTIONS ....... 35

4-1. Needle bar and thread take-up

mechanisms .............................................. 35

4-2. Lower shaft and shuttle race

mechanisms .............................................. 35

4-3. Work clamp lifter mechanism

(Solenoid specifications) .......................... 36

4-4. Work clamp lifter mechanism

(Pneumatic specifications) ....................... 37

4-5. Intermittent presser foot lifter

mechanism ................................................ 37

4-6. Intermittent presser foot stroke

mechanism ................................................ 38

4-7. Feed mechanism ....................................... 39

4-8. Thread trimmer mechanism....................... 40

4-9. Tension release mechanism...................... 41

4-10. Thread wiper mechanism .......................... 41

5. DISASSEMBLY ................................. 42

5-1. Covers ....................................................... 42

5-2. Thread wiper mechanism .......................... 43

5-3. Work clamp arm mechanism ..................... 44

5-4. Intermittent presser foot lifter

mechanism (1) ......................................... 45

5-5. Needle bar mechanism.............................. 46

5-6. Upper shaft mechanism............................. 47

5-7. Lower shaft mechanism............................. 48

5-8. Feed covers............................................... 49

5-9. Feed mechanism ....................................... 50

5-10. Work clamp lifter mechanism

(Solenoid specifications) .......................... 53

5-11. Work clamp lifter mechanism

(Pneumatic specifications) ....................... 54

5-12. Tension release mechanism...................... 55

5-13. Intermittent presser foot lifter

mechanism (2) ......................................... 55

5-14. Thread trimmer mechanism ....................... 56

5-15. Shuttle hook mechanism ........................... 57

BAS-311G, BAS-326G

6. ASSEMBLY ......................................... 58

6-1. Thread trimmer mechanism (1) ............... 58

6-2. Intermittent presser foot lifter

mechanism (1) ......................................... 60

6-3. Tension release mechanism ..................... 60

6-4. Work clamp lifter mechanism

(Solenoid specifications) ......................... 61

6-5. Work clamp lifter mechanism

(Pneumatic specifications) ...................... 64

6-6. Feed mechanism....................................... 66

6-7. Feed covers .............................................. 73

6-8. Upper shaft mechanism ............................ 75

6-9. Needle bar mechanism ............................. 77

6-10. Intermittent presser foot lifter

mechanism (2) ......................................... 79

6-11. Lower shaft mechanism ............................ 81

6-12. Shuttle hook mechanism ........................... 83

6-13. Thread trimmer mechanism (2) ............... 83

6-14. Work clamp arm mechanism..................... 84

6-14-1. Adjustments after work clamp arm

installation ......................................... 85

6-15. Thread wiper mechanism .......................... 86

6-16. Covers....................................................... 87

7. ADJUSTMENT .................................... 88

7-1. Checking the machine head switch........... 88

7-2. Standard thread tension............................ 89

7-2-1. Upper and lower thread tension ........ 89

7-2-2. Thread take-up spring....................... 90

7-2-3. Arm thread guide R........................... 90

7-3. Adjusting the needle bar height................. 91

7-4. Adjusting the needle bar lift amount .......... 91

7-5. Adjusting the driver needle guard.............. 91

7-6. Adjusting the needle clearance ................. 92

7-7. Adjusting the shuttle race thread guide ..... 92

7-8. Rotary hook lubrication amount................. 92

7-9. Adjusting the position of the movable

knife .......................................................... 93

7-10. Replacing the movable and fixed knives ... 95

7-10-1. Installing the feed plate...................... 96

7-11. Adjusting the thread wiper ......................... 97

7-12. Presser foot installation position ................ 97

7-13. Changing the intermittent stroke................ 98

7-14. Adjusting the work clamp lift amount .........100

7-15. Adjusting the air pressure

(pneumatic specifications) .........................100

7-16. Adjusting the thread trimmer cam

position ......................................................101

7-17. Belt tension adjustment .............................101

7-18. Adjusting the tension release amount........102

7-19. Adjusting the backlash of the lower

shaft gear...................................................103

7-20. Adjusting the home position.......................104

7-20-1. Work clamp lift home position............104

7-20-2. X-Y feed home position .....................105

7-21. Adjusting the needle up stop home

position ......................................................107

7-22. Adjusting the needle up stop position ........108

8. ELECTRICAL MECHANISM ...............110

8-1. Precautions while carrying out

adjustments ...............................................110

8-2. Inside the control box and operation

panel structure...........................................111

8-3. Description of fuses ...................................112

8-4. Description of connectors ..........................113

8-4-1. Connector positions...........................113

8-4-2. Symptoms when there are poor

connections .......................................116

8-5. Troubleshooting.........................................119

8-5-1. Diagnosis flowchart ...........................119

8-5-2. Remedy .............................................123

9. TABLE OF ERROR CODES ...............137

10. TROUBLESHOOTING ......................141

11. 7-SEGMENT DISPLAY .....................144

BAS-311G, BAS-326G

1. SPECIFICATIONS

Sewing machine Lock stitch, pattern tacking sewing machine (with large shuttle hook)

Stitch formation Single needle lock stitch

Max. sewing speed 2,700 rpm

Sewing area (XxY) BAS-311G: Max. 130 x 100 mm, BAS-326G: Max. 220 x 100 mm

Feed mechanism Intermittent feed, pulse motor drive

Stitch length

No. of stitches 500,000-stitch internal memory (*)

Maximum no. of stitches 20,000 stitches (per program)

No. of sewing data items that can be stored

Work clamp lift method

Work clamp height Solenoid specifications: Max. 25 mm, pneumatic specifications: Max. 30 mm

2-step work clamp

Intermittent presser foot lift amount

Intermittent stroke

Internal memory: 512 (*), CF card: 900

Solenoid specifications: Pulse motor drive method

Pneumatic specifications: Pneumatic method

Solenoid specifications: Integrated-type work clamp

Pneumatic specifications: Separate-type work clamp

2 − 4.5 mm, 4.5 − 10 mm or 0 (Default setting 3 mm)

0.05 − 12.7 mm

22 mm

Rotary hook Double-capacity shuttle hook (standard shuttle hook sold separately)

Wiper device Standard equipment

Thread trimmer Standard equipment

Data storage method

User programs 50

Cycle programs 9

Motor 550 W AC servo motor

Weights

Power supply Single-phase 100 V/220 V, Three-phase 200 V/220 V/380 V/400 V 400 VA

Air pressure 0.5 MPa 1.8 l/min.

* The number of data items and stitches that can be stored will vary depending on the number of stitches in each program.

Internal memory (Flash memory), CF card (32, 64, 128, 256 MB)

[Option] 3.5 floppy disk 2HD/1.44MB, 2DD

Machine head approx. 88 kg, operation panel approx. 0.6 kg

Control box 14.2 − 16.2 kg (Differs depending on destination)

BAS-311G, BAS-326G

2. FUNCTION SETTINGS

2-1. List of special functions when power is turned on

4421Q

Memory switch setting mode (Standard)

Refer to the Instruction Manual.

Memory switch setting mode (Advanced)

Refer to “2-3. Memory Switch Setting Method (Advanced)”.

Data initialization function

Refer to the Instruction Manual.

Error log display function

Refer to “2-7. Error history checking method”.

Input checking function

Refer to “2-8. Input checking method”.

4541Q

4543Q

4544Q

4545Q

4542Q

Output checking function

Refer to “2-9. Output checking method”.

Software version display function

Refer to “2-10. Software version checking method”.

Feed plate installation mode

Refer to “7-10-1. Installing the feed plate”.

Home position adjustment mode

Refer to “7-20. Adjusting the home position”.

Needle up stop position adjustment mode

Refer to “7-22. Adjusting the needle up stop position”.

5056Q

4546Q

4547Q

5057Q

4548Q

4549Q

BAS-311G, BAS-326G

2-2. List of advanced functions

While holding down the TEST key, press the corresponding combination key.

Memory switch setting mode (Standard)

Refer to the Instruction Manual.

Lower thread counter setting mode

4489Q

4490Q

User program setting mode

Parallel movement mode

2. FUNCTION SETTINGS

4550Q

4493Q

Refer to the Instruction Manual.

4551Q

Refer to the Instruction Manual.

Production counter setting mode

Refer to the Instruction Manual.

Production counter temporary display function

When SPEED indicator is illuminated

Refer to the Instruction Manual.

4491Q

4492Q

BAS-311G, BAS-326G

Stitch counter checking mode

Refer to “2-6. Stitch counter checking method”.

CF data read/write mode

Refer to the Instruction Manual.

4552Q

4553Q

Refer to “3-4. Data read/write mode”.

2. FUNCTION SETTINGS

2-3. Memory switch setting method (Advanced)

If you would like to display only the numbers of memory switches that have been changed from default settings

Ending setting mode

ll indicators switch off

Menu indicator switches off

TEST indicator illuminates

TEST indicator switches off

• If you would like to return the setting for a single memory switch to the default setting, press the RESET key while the number for that memory switch is displayed.

• To return the settings for all memory switches to the default settings, keep pressing the RESET key for two or more seconds until the buzzer makes a long beep.

While pressing the TEST key and the SELECT key, turn on the power switch. * Keep pressing the TEST key and the SELECT key until

the model name is displayed and the buzzer beeps once.

• The memory switch number will be displayed in the PROGRAM No. display and the setting value for that number will be displayed in the menu display.

4449Q 4421Q

Press the number.

Press the

While pressing the SELECT key, press the or key.

• The numbers of memory switches that have been changed from default settings will appear in order.

• If no memory switches have been changed from their default settings, the display will not change and the buzzer will beep twice.

Press the TEST key.

• The changes will be memorized and the sewing machine will switch to home position detection standby.

or key to select the memory switch

or key to change the setting value.

4554Q

4555Q

BAS-311G, BAS-326G

2-4. List of memory switch settings

2. FUNCTION SETTINGS

No.

001

002

003

100

200

300

400

401

402

403

*1 The mm display may differ slightly from the actual sewing size.

Setting

range

Work clamp lift timing after sewing is completed

OFF Lifts at the final stitch position.

ON Lifts after moving to the home position.

Separate-type work clamp drop operation (pneumatic specifications)

0 Left and right work clamp drop at the same time. 1 2

Work clamp drop operation (solenoid specifications)

Sewing start speed

OFF

Single-stitch test feed

OFF

Production counter display

OFF Lower thread counter display

ON Production counter display

User programs

OFF Disabled

ON User program mode is enabled.

Cycle programs

OFF Disabled

ON When sewing user programs, the set programs are sewn in numeric order.

Maximum reduction ratio (mm display) (*1)

OFF Displayed as %.

ON Displayed as mm.

Split mode selection

0 Continuous split (split menu is disabled before split detection) 1 Continuous split (split menu is always enabled) 2 Independent split

Work clamp drops in the order left → right. Work clamp drops in the order right → left.

Analog dropping: Work clamp drops in direct proportion to the pedal depression amount, and sewing starts when the pedal is fully depressed 1st step drop: Work clamp drops when pedal is depressed to the 1st step, and sewing starts when pedal is depressed to the 2nd step 2nd step drop: Work clamp drops to intermediate height when the pedal is depressed to the 1st step, and work clamp drops and sewing starts when the pedal is depressed to the 2nd step.

The sewing speed for the first 1 − 5 stitches is set by memory switch numbers 151

− 155. 1st stitch at 400 rpm, 2nd stitch at 400 rpm, 3rd stitch at 600 rpm, 4th stitch at 900 rpm, 5th stitch at 2,000 rpm

Test feed starts when the foot switch (start switch) is depressed, and it continues automatically until the final stitch. Test feed is carried out one stitch at a time when the foot switch (start switch) is depressed (feed becomes continuous if the foot switch [start switch] is continuously depressed).

In addition, when the TEST indicator is illuminated, test feeding will move forward one stitch at a time when the machine pulley is turned by hand.

Setting items Initial value

OFF

BAS-311G, BAS-326G

2. FUNCTION SETTINGS

Work clamp settings

No.

Setting

range

Work clamp operating mode (*2)

1 (Standard single pedal) Work clamp rises automatically.

050

Setting items Initial value

(Single pedal with no automatic work clamp lifter) Work clamp rises in accordance with foot switch depression amount. (Standard 2 pedal) Work clamp rises automatically, and drops in accordance with work clamp switch depression amount * The left and right order can be changed using memory switch No. 002. (2 pedal with no automatic work clamp lifter) Work clamp lifts while work clamp switch is being depressed.

(Left/right work clamp → Intermittent presser foot 2-step work clamp) When the work clamp switch is depressed to the 1st step, both the left and right work clamps drop, and when it is depressed to the 2nd step, the intermittent presser foot drops. (Lifting is in the same order.) (Left and right alternating 2-step work clamp) Two-step operation, with left and right order switching for each item sewn. Starts from right → left (Forward/reverse pedal) When the start switch is depressed, the work clamp drops and the sewing machine starts in that order with forward control, and when the work clamp switch is depressed, the sewing machine reverses and the work clamp lifts. * The left and right order can be changed using memory switch No. 002. (2-step work clamp using two presses)

For solenoid specifications (1 pedal)

When the foot switch is depressed, the work clamp stops in the intermediate position → work clamp drops → sewing machine starts in that order, and the work clamp lifts when the foot switch is depressed backward. * The work clamp does not stop in the intermediate position if memory switch No.

003 is set to “1”.

For pneumatic specifications (2 pedal)

When the work clamp switch is depressed, the left work clamp drops → right work clamp drops → both work clamps lift in that order. * The left and right order can be changed using memory switch No. 002. (Standard 3 pedal)

For solenoid specifications

The left pedal lowers the work clamp in the intermediate position, the right pedal (center) lowers the work clamp, and the start pedal (right) starts the sewing machine. * The work clamp does not stop in the intermediate position if memory switch No.

003 is set to “1”.

For pneumatic specifications

The left pedal raises and lowers the left work clamp, and the right pedal (center) raises and lowers the right work clamp. The start pedal (right) starts the sewing machine. (Triple pedal with independent home detection) The right pedal (center) is used exclusively for detecting the home position. The left pedal raises and lowers the left and right work clamps, and the start pedal (right) starts the sewing machine. (Special triple pedal with independent home detection) The right pedal (center) is used exclusively for detecting the home position. The left pedal raises and lowers the left work clamp, and the start pedal (right) lowers the right work clamp and starts the sewing machine.

*2 Allowable setting values by specification

Pedal specifications Solenoid specifications Pneumatic specifications

1 pedal 1, 2, 8 1, 2 2 pedal 3, 4 3, 4, 5, 6, 7, 8 3 pedal 9 9, 10, 11

*3 Solenoid specifications: 1, Pneumatic specifications: 3

BAS-311G, BAS-326G

2. FUNCTION SETTINGS

No.

Setting

range

Setting items Initial value

Work clamp operation before home position detection

051

OFF Work clamp cannot be raised or lowered before home position is detected

ON Work clamp can be raised and lowered before home position is detected

Work clamp operation during split programs

052

053

OFF Work clamp lifts automatically when sewing pauses due to a split program

Work clamp lifts when the foot switch is depressed when sewing pauses due to a split program

Time from intermittent presser foot lifting until feed mechanism starts moving

0 − 999

Units (mS)

OFF

100

Intermittent presser foot drop timing

Presser foot drops when the work clamp switch is depressed, but it does not drop at the feed retract position.

Presser foot drops at the sewing start, regardless of the work clamp switch operation.

054

1 Presser foot drops when the work clamp switch is depressed.

Work clamp signal valve special output for pneumatic-type work clamp (pneumatic specifications)

0 Disabled

Valve output is reversed for pneumatic specifications

055

(Connect the air tubes in reverse so that the work clamp can lift when the power is turned off.)

Reverse valve output is output simultaneously for 2-position valve specifications.

(Right work clamp reverse = Option output No. 4, Left work clamp reverse = Option output No. 5)

Thread winding operation before home position is detected

056

OFF Thread winding cannot be carried out before home position is detected.

OFF

ON Thread winding can be carried out before home position is detected.

Work clamp operation when feed moves to sewing start position after home position is detected

Work clamp stays dropped after home position is detected

057

OFF

Work clamp lifts when pedal is depressed backward (for single pedal) or when work clamp switch is depressed (for 2 pedals) Work clamp lifts automatically after home position is detected. * Disabled when memory switch No. 050 = 2 or 4.

Work clamp operation at sewing end

058

OFF

Work clamp lifts automatically at the sewing end * Disabled when memory switch No. 050 = 2 or 4.

OFF

ON Work clamp does not lift automatically at the sewing end

BAS-311G, BAS-326G

2. FUNCTION SETTINGS

Sewing machine motor settings

No.

Setting

range

Setting items Initial value

Highest needle position stop

OFF Disabled

When the upper shaft stops, the motor operates in reverse to return the needle bar

150

close to its highest position. (When the motor operates in reverse to raise the needle, the thread take-up will stop at a position which is lower than its normal stopping position. As a result, the

OFF

thread take-up will rise slightly at the sewing start, and this may result in the thread pulling out under certain conditions.)

151

152

153

154

155

156

157

158

159

1st stitch sewing speed at the sewing start

4 − 27

(Units x100 rpm)

2nd stitch sewing speed at the sewing start

4 − 27

(Units x100 rpm)

3rd stitch sewing speed at the sewing start

4 − 27

(Units x100 rpm)

4th stitch sewing speed at the sewing start

4 − 27

(Units x100 rpm)

5th stitch sewing speed at the sewing start

4 − 27

(Units x100 rpm)

5th last stitch sewing speed at the sewing end

4 − 27

(Units x100 rpm)

4th last stitch sewing speed at the sewing end

4 − 27

(Units x100 rpm)

3rd last stitch sewing speed at the sewing end

4 − 27

(Units x100 rpm)

2nd last stitch sewing speed at the sewing end

4 − 20

(Units x100 rpm)

Piercing force boosting operation

161

OFF Disabled

Piercing force boosting operations are carried out when the sewing machine motor is locked

OFF

Regulation of sewing speed changes due to sewing pitch changes

OFF Sewing speed varies depending on sewing pitch of the sewing data

162

Speed is fixed at the minimum sewing speed for the maximum pitch of the sewing data (Set to ON if there may be a problem with sewing speed changes as a result of

OFF

pitch changes.)

163

Limits the maximum sewing speed.

12 − 27

(Units x100 rpm)

Thread trimming disabled

164

OFF Thread trimming is carried out in accordance with the sewing data.

OFF

ON All thread trimming operations are disabled.

Highest needle position stop angle (Units 2 degree steps) (*4)

165

-15 − 0

0: Normal needle up position: Needle bar height increases for values in the negative direction.

*4 If the setting value becomes to large in the negative direction, error “E110” may be generated at the first sewing start

after the power is turned on.

BAS-311G, BAS-326G

Feed settings

No.

Mechanism home position return when sewing is finished

250

Feed speed

251

High-speed test feeding

252

Home position detection method

253

Movement path from mechanism home position to start position

254

260

261

262

263

264

265

266

Changes the overall feed timing

-10 − 10 -10: Early ← 0: Standard → 10: Late

Changes the feed timing for the 1st stitch at the sewing start

-10 − 10 -10: Early ← 0: Standard → 10: Late

Changes the feed timing for the 2nd stitch at the sewing start

-10 − 10 -10: Early ← 0: Standard → 10: Late

Changes the feed timing for the 3rd stitch at the sewing start

-10 − 10 -10: Early ← 0: Standard → 10: Late

Changes the feed timing for the 3rd stitch before the sewing end

-10 − 10 -10: Early ← 0: Standard → 10: Late

Changes the feed timing for the 2nd stitch before the sewing end

-10 − 10 -10: Early ← 0: Standard → 10: Late

Changes the feed timing for the 1st stitch before the sewing end

-10 − 10 -10: Early ← 0: Standard → 10: Late If the overall feed timing (setting for No. 260) is changed from the default value, specify the number of applicable stitches.

267

Changes feed timing standard

268

269

Adjusts the feed motor output

2. FUNCTION SETTINGS

Setting

range

Setting items Initial value

OFF When sewing is finished, the feed plate returns to the start position.

When sewing is finished, the feed plate moves via the machine home position to the start position.

1 100 mm/s Slow 2 200 mm/s 3 300 mm/s 4 400 mm/s 5 500 mm/s Fast

Feeding is normally slow, and becomes faster when the foot switch is depressed

OFF

to the 1st step (For 2 pedals, it becomes faster when the work clamp switch is depressed.)

Test feeding is at the same speed as sewing. * This does not apply to checking stitch by stitch.

OFF Depress the foot switch (start switch) while the PROGRAM No. display is flashing.

Press the special external input switch (EXIN3) while the PROGRAM No. display is flashing. (Foot switch/start switch are disabled.)

Moves to the start position simultaneously for X and Y, in the order of in front of Y → middle of X. Moves to start position in the order of X start point → Y start point in the order of in front of Y → middle of X. Moves to start position in the order of right edge of X → Y start point → X start point in the order of right edge of X → in front of Y. Moves to start position in the order of left edge of X → Y start point → X start point in the order of left edge of X → in front of Y.

0 No limit

1 − 99

The feed timing returns to the standard feed timing once the specified number of stitches has been sewn.

0 [Feed start reference] Makes the timing uniform at the start of feed.

[Needle up reference] Changes the timing at the start of feed so that the needle

zigzagging is even. 2 [Feed end reference] Makes the timing uniform at the end of feed. 3 [Linked to speed] Feed timing is uniform even if the sewing speed changes.

-5 − 5 -5: Low← 0: Standard → 5: High

OFF

BAS-311G, BAS-326G

2. FUNCTION SETTINGS

Operation panel settings

No.

Setting

range

Operation panel changing limitation

0 No limits on changing setting values using the operation panel.

350

3 Program numbers cannot be changed. 4 Program numbers and XY scale settings cannot be changed. 5 Program numbers, XY scale and sewing speed settings cannot be changed. 6 XY scale settings cannot be enlarged. (They can be reduced.) 7 Sewing speed setting cannot be changed.

Changing memory switches

351

OFF Allowed

ON Forbidden

Counting method for lower thread counter and production counter

352

0 Counted for each item of sewing data 1 Counted for each thread trimming operation. 2 Counted when sewing data ends or when split stops

Counter timing for lower thread counter

353

OFF Counted at the end of sewing.

ON Counted at the start of sewing.

Switching program numbers using an external switch

0 Disabled

354

1 − 9

Switches split numbers using an external switch

355

OFF Disabled

Setting items Initial value

Program numbers, XY scale, sewing speed, lower thread counter, work clamp

height, intermittent height and digital tension values cannot be changed.

Program numbers, XY scale, sewing speed, work clamp height, intermittent height

and digital tension values cannot be changed.

Program number is switched by means of the 5 bits of option input (EXIN6 −

EXIN10).

Applicable numbers are: Setting number = 3rd digit, last two digits can be 1 − 31.

Split number is switched by means of the 5 bits of option input (EXIN6 − EXIN10).

Applicable numbers are 1 − 31 (only enabled for independent split mode)

OFF

User program settings

No.

Setting

range

Moving to start point when switching user programs

450

OFF Feed moves to the start point after starting and switching.

Limitations on changing settings for user programs

452

OFF No limit

ON User program contents cannot be changed.

Setting items Initial value

Feed moves to the next sewing start point at the same time as the user program

switches.

OFF

BAS-311G, BAS-326G

Data editing settings

No.

Setting

range

Sewing area limit in X direction [Units mm]

460

0 − 130 0 − 220

461

Sewing area limit in Y direction

0 − 100

Enlargement/reduction reference point

462

0 Center of sewing frame 1 Sewing start point 2 Center of pattern

Enlargement/reduction for bar tacking

463

OFF Bar tacking stitches (pitch approx. 1 mm or less) cannot be enlarged or reduced.

ON Bar tacking stitches (pitch approx. 1 mm or less) are also enlarged or reduced.

Enlargement/reduction ratio in XY directions

464

OFF Disabled

Storing parallel movement amount for sewing pattern

465

OFF

Reading sewing data from eternal media into internal memory

0 [Normal mode] Programs are copied one by one into internal memory.

466

Changing gear ratio correction method when reading from a 2DD floppy disk.

467

1 BAS-311A data is read. 2 BAS-326A data is read. 3 BAS-341A/BAS-342A data is read.

Retract point switching at parallel movement point

468

OFF Disabled

ON The position moved to by parallel movement is recorded as the retract point.

2. FUNCTION SETTINGS

Setting items Initial value

BAS-311G setting value 130

BAS-326G setting value 220

[Units mm] 100

OFF

Enlargement/reduction ratio setting is the same for X and Y

OFF

(Disabled for user programs)

Initialized when program number or enlargement/reduction ratio is changed and

when power is turned off.

OFF Initialized when program number or enlargement/reduction ratio is changed but not when power is turned off.

[Overwrite mode] Sewing data is overwritten into the temporary buffer area. If sewing data with the same program number already exists in internal memory, it is deleted. [Assignment mode] Sewing data is overwritten into the temporary buffer area.

If sewing data with the same program number already exists in internal memory, it is not deleted, but only the data in the temporary buffer is used. (If sewing data with the same program number already exists in internal memory and the setting is changed to “0” or “1”, the data in the temporary buffer will be cleared.)

Automatic conversion as specified by sewing machine model. (For the BAS-311G, data is read as BAS-311A data and then converted.)

OFF

Device settings

No.

Setting

range

Needle cooler device

550

OFF Disabled

ON Needle cooler device is used. (Option output No. 12)

Tension release setting at the sewing start

551

OFF Disabled

ON Enabled

552

553

Tension release timing during thread trimming [Units 8 degree steps]

-10 − 1 -10: Early ← 0: Standard → 1: Late

Thread nipping timing (*5)

1 − 4 1: Early ← 2: Standard → 4: Late

*5 Not used for the BAS-311G and BAS-326G.

Setting items Initial value

BAS-311G, BAS-326G

OFF

2. FUNCTION SETTINGS

No.

Setting

range

Thread breakage detector

554

OFF Disabled

ON Fiber-type thread breakage detector used

Thread breakage detector detection sensitivity

555

OFF 5 stitches at sewing start, 3 stitches while sewing

ON 10 stitches at sewing start, 3 stitches while sewing

Inner clamping device (Option output No. 13)

0 Disabled

Inner clamping device is used.

556

(Retract operation is carried out at the sewing end to prevent interference with the needle.)

2 Inner clamping device is used. (No retract operation at the sewing end.)

Inner clamping device operates for 1/4 of the sewing pattern and returns for the

other 3/4. (No retract operation)

External wiper device

557

0 Disabled 1 Solenoid-type wiper device is used. 2 Pneumatic-type wiper device is used. (Option output No. 2)

External error monitoring input

558

OFF Disabled

ON Enabled (P10, option input No. 13 [AIRSW])

Operating indicator output

OFF Disabled

559

Option output No. 9: Output ON while operating Option output No. 10: ON during lower thread conversion and during test mode Option output No. 11: ON when error is generated

Automatic ejector (Option output No. 3 output, option input No. 1 = right sensor, input No. 2 = left sensor) [Pneumatic specifications]

560

0 Disabled 1 Standard operation 2 Sewing starts when cassette sensor is ON 3 Start switch is enabled even if cassette sensor is OFF.

Timer from sensor detection to sewing start when automatic ejector automatic starting is set

561

(memory switch No. 560 = 2) [Pneumatic specifications]

0 − 999

Time from after the cassette is chucked until automatic starting

Changes the digital tension setting value.

562

OFF Tension number can be changed regardless of the sewing data.

Only tension No. 0 and the tension numbers detected in the sewing data can be changed.

2-step tension is possible (When using spring-type main tension)

563

OFF Disabled

ON 2-step tension is used.

Increases maximum tension release force when using a spring-type main tension

0 Disabled (Tension release is open at the sewing end.)

564

Increases the force (Tension release is closed at the sewing end. If tension release is open, it will be closed in approximately 5 minutes.) Increases force to the maximum. (Tension release is closed at the sewing end. If tension release is open, it will be closed in approximately 1 minute.)

Thread nipper device (*6)

565

OFF Disabled

Thread nipper device installed (Memory switch No. 500 must also be set to ON or OFF.)

*6 Not used for the BAS-311G and BAS-326G.

Setting items Initial value

OFF

100

OFF

BAS-311G, BAS-326G

Error processing settings

No.

Setting

range

Error release method when operation has stopped

650

0 Press the RESET key. 1 Press the RESET key or the STOP switch. 2 Press the RESET key or input a signal from the external switch (EXIN3).

Needle stop position when sewing is interrupted by the STOP switch

651

0 Needle stops in the down position. 1 Needle stops in the up position. 2 Needle stops in the up position after thread trimming.

Thread trimming operation when sewing is paused

652

OFF Thread trimming is carried out when the pause is canceled.

ON Thread trimming is not carried out when the pause is canceled.

Resuming sewing after sewing is paused

653

OFF

STOP switch → RESET key → STOP switch → RESET key → Sewing starts

Disables the needle up stop position monitoring sensor

655

OFF Sensor is enabled and needle up stop position errors [E110] are detected.

ON Disabled

Home position return when sewing is paused

656

OFF Mechanism moves to home position and then moves to sewing start position.

Mechanism steps back to the sewing start position along the sewing path without moving to the home position.

2. FUNCTION SETTINGS

Setting items Initial value

OFF

key → Sewing starts

OFF

Maintenance settings

No.

Setting

range

Run-in operation mode

0 Disabled

While the foot switch is being depressed, the work clamp moves up and down

once and then continuous operation starts. (Work clamp does not move up or down if memory switch No. 050 = 2 or 4)

750

While the foot switch is being depressed, the work clamp moves up and down twice and then continuous operation starts. (Work clamp does not move up or down if memory switch No. 050 = 2 or 4) While the foot switch is being depressed, the work clamp moves up and down

three times and then continuous operation starts. (Work clamp does not move up or down if memory switch No. 050 = 2 or 4)

751

752

Run-in operation cycle time adjustment timer

0 − 255

00 − 99

Units [x10 ms] Sewing machine ID code Sewing data specified on CF card

Reading/writing sewing data for old models

755

OFF Only compatible with floppy disks.

ON Reading and writing using CF cards is possible in data read/write mode.

Main shaft angle display mode

756

OFF Disabled

ON Main shaft angle is displayed when sewing machine starts.

Specifications and destination settings

No.

Setting

range Specification code setting (This memory switch does not return to the initial value when all settings are reset.)

Specifications at the time of shipment from the factory (Specifications shown on the model plate on the machine head)

850

1 Heavy-weight material specifications 2 Medium-weight material specifications 3 Extra heavy-weight material specifications

Setting items Initial value

OFF

Setting items Initial value

BAS-311G, BAS-326G

2. FUNCTION SETTINGS

Unique machine settings

No.

950

951

Setting

range Automatic start for extended option output No. 1

OFF Disabled

ON Sewing machine starts when extended option output No. 1 is ON.

Program number output

OFF Disabled

When the last two digits of the program number are 1 to 15, the program number is output in 4 bits to extended option output 4 − 7.

Setting items Initial value

OFF

2-5. Setting the work clamp mode

Combinations of memory switch settings can be used to switch the work clamp operating mode to any one of the following

modes.

Operating mode Memory switch setting

Drop operation

Analog drop

1st step drop

2nd step drop

(*) If memory switch No. 057 is OFF, the work clamp will lift when the pedal is depressed backward.

Drop operation

1st step drop Yes

2nd step drop Yes

(*) Work clamp lifts when pedal is depressed backward.

Automatic work

clamp lifting

Yes

No Dropped (*) Dropped (*) 0 2

Yes

No Dropped (*) Dropped (*) 1 2

Yes

No Dropped (*) Dropped (*) 2 2

Automatic work

clamp lifting

After home position detection After sewing start 003 050 057 058

Automatic lift

Dropped (*)

Automatic lift

Dropped (*)

Automatic lift

Dropped (*)

Operating mode Memory switch setting

After home position detection After sewing start 003 050 057 058

Automatic lift

Dropped (*)

Automatic lift

Dropped (*)

Automatic lift 0 1 ON OFF

Dropped 0 1 ON ON

Automatic lift 0 1 OFF OFF

Dropped (*) 0 1 OFF ON

Automatic lift 1 1 ON OFF

Dropped 1 1 ON ON

Automatic lift 1 1 OFF OFF

Dropped (*) 1 1 OFF ON

Automatic lift 2 1 ON OFF

Dropped 2 1 ON ON

Automatic lift 2 1 OFF OFF

Dropped (*) 2 1 OFF ON

Automatic lift 1 8 ON OFF

Dropped (*) 1 8 ON ON

Automatic lift 1 8 OFF OFF

Dropped (*) 1 8 OFF ON

Automatic lift 2 8 ON OFF

Dropped (*) 2 8 ON ON

Automatic lift 2 8 OFF OFF

Dropped (*) 2 8 OFF ON

− −

BAS-311G, BAS-326G

Operating mode Memory switch setting

Work clamp operation

Work clamp lifts automatically and drops when the work clamp switch is depressed.

After home position

detection

Automatic lift

Dropped

After sewing start 002 050 057 058

Automatic lift 3 ON OFF

Automatic lift 3 OFF OFF

2. FUNCTION SETTINGS

Work clamp drop

Dropped 3 ON ON

Dropped

sequence selection 0: Left and right

simultaneously 1: Left → Right 2: Right → Left

3 OFF ON

Work clamp rises while work clamp switch is depressed

Work clamp switch 1st step: Both left and right work clamps drop 2nd step: Intermittent presser foot drops Lifting is simultaneous

Work clamp drop sequence at work clamp switch 1st and 2nd steps alternates each time an article is sewn. Initially right → left

Operating mode Memory switch setting

Work clamp operation

When start switch is depressed, work clamp drops → sewing starts Lifts in reverse order using work clamp switch

Work clamp switch Left (right) work clamp → Right (left) work clamp → Both work clamps lift

Dropped Dropped

Automatic lift

Dropped

Automatic lift

Dropped

After home position

detection

Automatic lift

Dropped

Automatic lift

Dropped

Automatic lift 5 ON OFF

Automatic lift 5 OFF OFF

Automatic lift 6 ON OFF

Automatic lift 6 OFF OFF

After sewing start 002 050 057 058

Automatic lift 7 ON OFF

Automatic lift 7 OFF OFF

Automatic lift 5 ON OFF

Automatic lift 5 OFF OFF

−

Dropped 5 ON ON

Dropped

Dropped 6 ON ON

Dropped

Work clamp drop

Dropped 7 ON ON

Dropped

Dropped 5 ON ON

Dropped

sequence selection 0: Left and right

simultaneously 1: Left → Right 2: Right → Left Work clamp drop sequence selection 0: Left and right

simultaneously 1: Left → Right 2: Right → Left

−

5 OFF ON

6 OFF ON

7 OFF ON

5 OFF ON

− −

2-6. Stitch counter checking method

5058Q

BAS-311G, BAS-326G

1. While holding down the TEST key (1), press the key (2). “Cnt” will be displayed in the PROGRAM No. display (3), and the cumulative number of stitches will be displayed in the menu display (4) in units of 100,000 stitches. (While the key (5) is being pressed, the cumulative number of stitches will be displayed in units of 100 stitches in all 7 digits of the PROGRAM No. display and the menu display (4).)

2. When the TEST key (1) is pressed, the display will return to the normal display.

1. When “Cnt” is displayed, press the cumulative number of stitches will change to “0000” and the display will flash.

2. Press the RESET key (7) for two seconds or more. (The cumulative number of stitches “0000” will stop flashing and illuminate, and the setting will be cleared. )

3. When the TEST key (1) is pressed, the display will return to the normal display.

key (6). The

2. FUNCTION SETTINGS

2-7. Error history checking method

The past error history can be checked by the following procedure.

TEST indicator illuminates, Menu indicator switches off

1. While pressing the * Keep pressing the key (1) until the model name is displayed and the buzzer beeps once.

The error history sequence number will be displayed in the PROGRAM No. display (2) and the error code will be displayed in the menu display (3).

2. Press the or key (4) to switch the error history sequentially.

3. When the TEST key (5) is pressed, the display will return to the normal display and the sewing machine will change to home position standby.

If there is no error history [000] Error [E110] is displayed first. [001] [E110]

• While the key (6) is being pressed, the COUNTER indicator will illuminate and the stitch number counter value at the

point where the error occurred will be displayed in the PROGRAM No. display (2) and the menu display (3) in units of 100 stitches.

key (1), turn on the power switch.

Details PROGRAM No. display (2) Menu display (3)

[E − − −]

4564Q

BAS-311G, BAS-326G

2. FUNCTION SETTINGS

2-8. Input checking method

Use this to check for any malfunctions of the operation panel keys, circuit boards or sensors, and for checking for broken cords and for adjusting sensor positions. You can check whether the CPU is correctly reading the signals from keys and sensors.

4565Q

1. While pressing the

key (1), turn on the power switch. * Keep pressing the key (1) until the model name is displayed and the buzzer beeps once. The check code will be displayed in the PROGRAM No. display (2), and the input status will be displayed in the menu display (3).

2. Press the key (1) or key (4) to select the desired check code. If no operations are carried out for 5 seconds after a check code has been selected, the check code and the abbreviated input name will flash alternately in the PROGRAM No. display (2).

3. Refer to the input check list for key and sensor responses.

4. To return to normal operation, turn off the power switch and then turn it back on again.

PROGRAM No. display Menu display

Check code Name Input status

[ 1] [orX] [ H] / [ L]

[ 2] [EnX]

[-999] − [999]

[ 3] [orY] [ H] / [ L]

[ 4] [EnY]

[-999] − [999]

[ 5] [orP] [ H] / [ L]

[ 6] [EnP]

[ 7] [Enn]

[-999] − [999]

[ 0] − [180]

X-axis motor home position sensor signal Move the feed mechanism by hand in the X direction. X-axis motor encoder counter value Move the feed mechanism by hand in the X direction. Y-axis motor home position sensor signal Move the feed mechanism by hand in the Y direction. Y-axis motor encoder counter value Move the feed mechanism by hand in the Y direction. Work clamp motor home position sensor signal Raise the work clamp by hand. Work clamp motor encoder counter value Raise the work clamp by hand. Upper shaft 180 degree rotation signal Turn the pulley by hand.

Check item and checking method

4566Q

BAS-311G, BAS-326G

2. FUNCTION SETTINGS

PROGRAM No. display Menu display

Check code Name Input status

[ 8] [ UP] [ on] / [ oFF]

[ 9] [ dn] [ on] / [ oFF]

[ 10] [voL]

[ 0] − [ 300]

Needle up signal Turn the pulley by hand. Needle drop signal Turn the pulley by hand. Power supply voltage Displayed as %

Check item and checking method

Operation panel input check

[ 11] [PnL] [*] / [ oFF]

While a key is being pressed, the name of the key will be displayed.

*ON display Key name

[rESt] RESET key [tESt] TEST key [tHrE] THREAD/CLAMP key

[ tEn] TENSION/WIND key [SELE] SELECT key [UP-M] key

[dn-M] key [ F1] Function key F1 [ F2] Function key F2 [ F3] Function key F3 [ F4] Function key F4 [ CF] R/W key

[ 12] [FtA]

[ 0] − [ 255]

[ 13] [CL1] [ on] / [ oFF]

[ 14] [CL2] [ on] / [ oFF]

[ 15] [Stt] [ on] / [ oFF]

[− − on]

[ 16] [EMC]

[on − −]

Foot switch analog value (Single pedal specifications) Depress the foot switch. Work clamp 1st step (2 pedal specifications) Depress the foot switch to the 1st step. Work clamp 2nd step (2 pedal specifications) Depress the foot switch to the 2nd step. Start switch (2 pedal specifications) Depress the foot switch to the 2nd step. STOP switch Press the STOP switch.

[− − − −]

[ 17] [HEd] [ on] / [ oFF]

Machine head switch Tilt back the machine head.

[ 18] [EXE] [ on] / [ oFF] External input error detection (IN13)

Thread nipper hope position sensor (IN14) (*1)

key to move the thread nipper in the home position

key to move the thread nipper in the retract

[ 19] [CAH] [ on] / [ oFF]

Press the direction. Press the direction. Thread nipper retract sensor (IN15) (*1) Press the key to move the thread nipper in the home position

[ 20] [rEL] [ on] / [ oFF]

direction. Press the

key to move the thread nipper in the retract

direction. [ 21] [in1] [ on] / [ oFF] Option input (IN1) [ 22] [in2] [ on] / [ oFF] Option input (IN2) [ 23] [in3] [ on] / [ oFF] Option input (IN3) [ 24] [in4] [ on] / [ oFF] Option input (IN4) [ 25] [in5] [ on] / [ oFF] Option input (IN5) [ 26] [rot] [ on] / [ oFF] Option input (IN11) [ 27] [Fib] [ on] / [ oFF] Fiber-type thread breakage detection [Option compatibility]

*1 Not used for the BAS-311G and BAS-326G.

BAS-311G, BAS-326G

PROGRAM No. display Menu display

Check code Name

Input status

Check item and checking method

[ 28] [Por] [ on] / [ oFF] Work clamp home position sensor [ 29] [Xor] [ on] / [ oFF] X-feed home position sensor [ 30] [Yor] [ on] / [ oFF] Y-feed home position sensor [ 31] [in6] [ on] / [ oFF] Option input (IN6) [ 32] [in7] [ on] / [ oFF] Option input (IN7) [ 33] [in8] [ on] / [ oFF] Option input (IN8) [ 34] [in9] [ on] / [ oFF] Option input (IN9) [ 35] [in10] [ on] / [ oFF] Option input (IN10)

2. FUNCTION SETTINGS

BAS-311G, BAS-326G

2. FUNCTION SETTINGS

2-9. Output checking method

Use this to check for any malfunctions of the circuit boards, and for checking for problems with drive mechanisms and broken cords. You can check whether the signals being output by the CPU are driving the mechanisms correctly.

4567Q

1. While pressing the * Keep pressing the key (1) until the model name is

displayed and the buzzer beeps once. The check code will be displayed in the PROGRAM No. display (2), and the abbreviated name of the output will be displayed in the menu display (3).

2. Press the key (4) or key (1) to select the desired check code.

3. The operations for check codes 51 to 54 can be checked by pressing the or key (5).

4. For check codes 55 and onward, depress the foot switch to the 2nd step. (If using a two-pedal foot switch, lower the work clamp before depressing the start switch (6). )

The corresponding operation for the check code will be carried out while the foot switch is being depressed (while the foot switch has been depressed once for check code 60).

2nd step

5. To return to normal operation, turn off the power switch and then turn it back on again.

4441Q 4953Q

PROGRAM No. display

Check code Name

[ 51] [PM-X]

[ 52] [PM-y]

[ 53] [PM-F]

[ 54] [CAtH]

Menu display

Operating details

When the

key is pressed, the work clamp moves to the left. When the key is pressed, the work clamp moves to the right. When the

key is pressed, the work clamp moves forward. When the key is pressed, the work clamp moves back. When the When the When the When the

key is pressed, the work clamp lifts.

key is pressed, the work clamp drops.

key is pressed, the thread nipper moves to the home position.

key is pressed, the thread nipper moves to the retract position. [Option compatibility]

[ 55] [CL-r] Right clamp valve turns on. (OUT16) (*1) [ 56] [CL-L] Left clamp valve turns on. (OUT15) (*1) [ 57] [Foot] Intermittent presser foot valve turns on. (OUT14) (*1) [ 58] [FLiP] Inner clamping device valve turns on. (OUT13) (*1) [ 59] [CooL] Needle cooler valve turns on. (OUT12) (*1)

[ 60]

The panel LEDs illuminate in order, and then the seven segments of the PROGRAM No. display and the menu display illuminate one by one.

*1 Applies for pneumatic specifications when corresponding devices are installed.

key (1), turn on the power switch.

BAS-311G, BAS-326G

PROGRAM No. display

Menu display

Check code Name

[ 61] [ CUt] Turns on the thread trimming solenoid.

Turns on the tension release solenoid/digital tension solenoid.

[ 62] [ rEL] / [dtEn]

(*2) However, in the case of digital tension, the solenoid turns on at the tension that has been set.

[ 63] [ WiP] Turns on the thread wiper solenoid. [ 64] [StEP] Turns on the option solenoid. [Option compatibility] [ 65] [ oP1] Turns on option output 1. [ 66] [ oP2] Turns on option output 2. [ 67] [ oP3] Turns on option output 3. [ 68] [ oP4] Turns on option output 4. [ 69] [ oP5] Turns on option output 5. [ 70] [ oP6] Turns on option output 6. [ 71] [ oP7] Turns on option output 7. [ 72] [ oP8] Turns on option output 8. [ 73] [ oP9] Turns on option output 9. [ 74] [oP10] Turns on option output 10. [ 75] [oP11] Turns on option output 11. [ 76] [oP17] Turns on option output 17. [ 77] [oP18] Turns on option output 18. [ 78] [oP19] Turns on option output 19. [ 79] [oP20] Turns on option output 20.

*2 Can be determined automatically using a connector shorting pin.

2. FUNCTION SETTINGS

Operating details

BAS-311G, BAS-326G

2. FUNCTION SETTINGS

2-10. Software version checking method

TEST indicator illuminates, Menu indicator switches off

1. While pressing the * Keep pressing the key (1) until the model name is displayed and the buzzer beeps once.

2. The display in the PROGRAM No. display (4) switches as follows each time the or key (3) is pressed.

PROGRAM No. display (4) Software

[1.Mn] Main CPU

[2.Mt] Motor CPU [3.PL] Panel CPU

[4.iP] Main CPU (IPL)

[5.PG] Programmer

3. When the TEST key (5) is pressed, the display will return to the normal display and the sewing machine will change to home position standby.

key (1), turn on the power. The software version will be displayed in the menu display (2).

5059Q

BAS-311G, BAS-326G

3. READING / WRITING DATA

3-1. Handling data

Program numbers (100 − 999) are read from CF cards. Program numbers (0 − 99) are older BAS-300 series, BAS-300A series and BAS-300E/F series data and can be read from floppy disks. However, when memory switch No. 755 is set to ON, data for older series models (program numbers 0 − 99) can be transferred from a floppy disk to a CF card using a computer and then be read from the CF card. * In such cases, the effective reading mode will be [r 1].

Option

0 − 99

or r9 mode

0 − 99

Old model series data range

(BAS***.SEW)

100 − 999

or r1 mode

100 − 999

BAS-311G, BAS-326G data range

ISM***.SEW

Sewing machine internal memory

Old model series data copied from floppy

r1 mode

disk to CF card

(0 − 99)

When memory switch

No. 755 = ON

100 − 999

or r1 mode

BAS-311G, BAS-326G

3. READING / WRITING DATA

3-2. Notes on handling CF cards (sold separately)

• Use a CF card with a memory capacity of 32, 64, 128 or 256 MB.

• Do not disassemble or modify the CF card.

• Do not bend, drop or scratch CF cards or place heavy objects on top of them.

• Avoid contact with liquids such as water, oil, solvents or drinks.

• Use and store CF cards in locations that are free from strong static electricity and electrical interference.

• Do not use or store CF cards in places where they may be subject to vibrations or shocks, direct sunlight, high

temperature or humidity or strong magnetic fields from equipment such as speakers, or places which are dusty from thread scraps, etc.

• Do not subject CF cards to shocks or impacts or remove them from the sewing machine while data is being loaded or

written.

• The data on the CF cards may become lost or corrupted due to some malfunction or accident. It is recommended that you

make a backup of important data.

• CF cards should only be removed after the power for the sewing machine has been turned off.

• CF cards are already formatted when they are purchased, and so you should not reformat them.

• The recommended CF cards are commercially-available ones from SanDisk or HAGIWARA SYS-COM. CF cards from

other manufacturers can be used, but different formatting methods may mean that loading from or writing to such cards may not be possible.

For more information, refer to the documentation provided with the CF card.

* This product is compatible with CF cards that have been formatted using the FAT16 method. Cards that have been

formatted using the FAT32 method cannot be used.

* CF * Company names and product names appearing in this manual are trademarks or registered trademarks of the

is a trademark of SanDisk Corporation.

respective owners. However, no TM or other similar symbols appear in the main text of this manual.

3-3. Structure of a CF card folder

\BROTHER\ISM\ISMSYS\ISM02MN.MOT : Control program \BROTHER\ISM\ISMDB00\ISMMSW.SEW : Memory switch data *1 \ISMUPG.SEW : User program data \ISMHST.SEW : Error log data \ISMS0100.SEW : Sewing data P No. = 100 \ISMS0101.SEW : Sewing data P No. = 101 \ISMS0102.SEW : Sewing data P No. = 102

*1 The underlined portion of the name of the \BROTHER\ISM\SMDB00 folder for sewing data can be changed by

changing the setting for memory switch No. 752 in order to change the folder name. Change the folder name if you would like to store sewing data for different sewing machines on a single CF card.

BAS-311G, BAS-326G

3-4. Data read/write mode

Turn on the power switch.

Switch to data read/write mode.

TEST indicator and CF media indicator illuminate

3. READING / WRITING DATA

With the power turned off, insert the CF card into the CF slot.

NOTE:

• Make sure the CF card is facing the correct way.

• Always be sure to keep the cover closed except

when inserting and removing the CF card. If this is not done, dust may get inside and cause problems with operation.

• If no valid data can be found, the CF media indicator will not illuminate.

4453Q

While pressing the TEST key, press the R/W key.

• The mode number will appear in the PROGRAM No. display, and the setting details for that mode will appear in the menu display.

• The initial mode is sewing data reading mode. (Refer to the read/write mode list)

4574Q

Press the or key to select the mode.

4575Q

[Read/write mode list]

PROGRAM No.

display

r 1 [-SEd] Sewing data is read from the CF card. (*1)

w 2 [SEd-] Sewing data is written to the CF card.

r 3 [-MEM] Memory switch settings are read from the CF card.

w 4 [MEM-] Memory switch settings are written to the CF card.

r 5 [-UPG] User programs are read from the CF card.

w 6 [UPG-] User programs are written to the CF card.

r 7 [-SyS] Control programs are read from the CF card and used to update the firmware version.

w 8 [LoG-] Error log data is written to the CF card.

r 9 [-Fdd] Sewing data is read from the floppy disk. (*2) (*3)

w 10 [Fdd-] Sewing data is written to the floppy disk. (*2)

r 11 [-EoP] Extended option output (*4) data is read from the CF card.

w 12 [EoP-] Extended option output data is written to the CF card.

r 13 [oPFd] Extended option output data is read from the floppy disk. (*2)

*1 The sewing data that can be use with this sewing machine is data that has been created for the BAS-311G/BAS-326G. *2 Only valid when using an optional floppy disk drive. *3 Sewing data for the BAS-300 series, BAS-300A series and BAS-300E/F series can be read. *4 Refer to the instruction manual for the programmer for details on extended option output.

Menu display Setting items

BAS-311G, BAS-326G

3. READING / WRITING DATA

3-5. Reading sewing data from CF cards

End data read/write mode

TEST indicator switches off

Press the R/W key.

• [-SEd] will change to [ ALL].

Press the read. * If [ ALL] is selected, all sewing data (Nos. 100—999) will be read at

once.

[When memory switch No. 755 is ON] The program number (0 − 99) is also displayed and can be selected. If you select [ ALL] at this time, all sewing data (Nos. 0 − 999) will be read at once.

Press the R/W key.

• The buzzer will sound and the selected sewing data will be loaded from the CF card and copied into the sewing machine's internal memory.

• The program numbers that have been read will be displayed in the menu display.

* If there is a large volume of data in the CF card, it will take some time

for all of it to be read. To halt the reading of data, press the STOP switch. If you then press the RESET key, the display will change back to [ ALL].

Press the TEST key. Turn off the power switch, remove the CF card, and then close the cover of the CF slot.

or key to select the program number (100 − 999) to be

Select the [r 1] data read/write mode.

4576Q

4577Q

4976Q

BAS-311G, BAS-326G

3-6. Writing sewing data to CF cards

Press the R/W key.

• [SEd-] will change to [ ALL].

Press the written. * If you select [ ALL], all sewing data (Nos. 100 − 999) will be written at

once.

3. READING / WRITING DATA

Select the [w 2] data read/write mode.

4578Q

or key to select the program numbers (100 − 999) to be

End data read/write mode

Writing

TEST indicator switches off

[When memory switch No. 755 is ON]

The program numbers (0 − 99) will also be displayed and can be selected. If you select [ ALL] at this time, all sewing data (Nos. 0 − 999) will be written at once.

Press the R/W key.

• The buzzer will sound and the selected sewing data will be copied from the internal memory onto the CF card.

• The program numbers that have been written will appear in the PROGRAM No. display.

* If there is a large volume of data in the internal memory, it will take

some time for all of it to be written. To halt the writing of data, press the STOP switch. If you then press the RESET key, the display will change back to [ ALL].

Press the TEST key. Turn off the power switch, remove the CF card, and then close the cover of the CF slot.

4577Q

4977Q

BAS-311G, BAS-326G

3. READING / WRITING DATA

3-7. Reading memory switch data from CF cards

Select the [r 3] data read/write mode.

Press the R/W key.

• The buzzer will sound and the memory switch data will be loaded from the CF card and copied into the sewing machine's internal memory.

When [ End] is displayed, the process is complete. Turn off the power switch, remove the CF card, and then close the cover of the CF slot.

4580Q

4498Q

3-8. Writing memory switch data to CF cards

End data read/write mode

Writing

TEST indicator switches off

Select the [w 4] data read/write mode.

Press the R/W key.

• The buzzer will sound and the memory switch data will be copied from the internal memory onto the CF card.

Press the TEST key. Turn off the power switch, remove the CF card, and then close the cover of the CF slot.

4581Q

4582Q

4579Q

BAS-311G, BAS-326G

3-9. Reading user program data from CF cards

Select the [r 5] data read/write mode.

Press the R/W key.

• The buzzer will sound and the user program data will be loaded from the CF card and copied into the sewing machine's internal memory.

When [ End] is displayed, the process is complete. Turn off the power switch, remove the CF card, and then close the cover of the CF slot.

3-10. Writing user program data to CF cards

End data read/write mode

Writing

TEST indicator switches off

Select the [w 6] data read/write mode.

Press the R/W key.

• The buzzer will sound and the user program data will be copied from the internal memory onto the CF card.

Press the TEST key. Turn off the power switch, remove the CF card, and then close the cover of the CF slot.

3. READING / WRITING DATA

4583Q

4498Q

4581Q

4584Q

4579Q

BAS-311G, BAS-326G

3. READING / WRITING DATA

3-11. Updating the control program

Select the [r 7] data read/write mode.

4585Q

Press the R/W key.

• [-SyS] will be displayed for a certain amount of time, and then the display will change to [ vEr], and after that the version number of the control program that is stored on the CF card will be displayed.

5060Q

4581Q

Press the R/W key.

• [ P] will flash in the PROGRAM No. display and the control program will be updated.

NOTE:

If the filename and folder name for the control program are incorrect, error [E421] will be displayed.

When [ End] is displayed, the process is complete. Turn off the power switch, remove the CF card, and then close the cover of the CF slot.

NOTE:

• Version updating may take about 3 − 10 minutes. (The time taken will vary depending on the manufacturer and storage capacity of the CF card being used. )

• Never remove the CF card or turn off the power switch while reading of the CF card is in progress.

If the version updating did not complete normally, such as because of a power outage, the sewing machine will not operate correctly. If this happens, restore the control program by the following procedure.

1. Insert the CF card containing the control program data into the CF card slot.

2. Turn on the power switch. The operation panel will switch off and the version updating will be carried out.

3. When the initial screen turns back on, the updating is complete. Turn off the power switch, remove the CF card, and then close the cover of the CF slot.

BAS-311G, BAS-326G

3-12. Writing error log data to CF card

End data read/write mode

Writing

TEST indicator switches off

Select the [w 8] data read/write mode.

Press the R/W key.

• The buzzer will sound and the error log data will be copied from the internal memory onto the CF card.

Press the TEST key. Turn off the power switch, remove the CF card, and then close the cover of the CF slot.

3-13. Reading sewing data from floppy disks

3. READING / WRITING DATA

5061Q

4579Q

Insert the floppy disk into the floppy disk drive.

1 2

Select the [r 9] data read/write mode.

5062Q

Press the R/W key.

• [-Fdd] will change to [ ALL].

Press the * Program numbers that contain no data will also be displayed at this

time.

* If [ ALL] is selected, all sewing data will be read at once.

or key to select the program number to be read.

4577Q

BAS-311G, BAS-326G

3. READING / WRITING DATA

End data read/write mode

TEST indicator switches off

Press the R/W key.

• The buzzer will sound and the selected sewing data will be loaded from the floppy disk and copied into the sewing machine's internal memory.

• The program numbers that have been read will appear in the menu display.

* If there is a large volume of data in the floppy disk, it will take some

time for all of it to be read. To halt the reading of data, press the STOP switch. If you then press the RESET key, the display will change back to [ ALL].

NOTE:

If there is no data in the selected program number, error [E421] will be displayed. Press the RESET key and then select another program number.

Press the TEST key. Turn off the power and remove the floppy disk.

3-14. Writing sewing data to floppy disks

5063Q

Insert the floppy disk into the floppy disk drive.

1 2

Select the [w 10] data read/write mode.

5064Q

Press the R/W key.

• [Fdd-] will change to [ ALL].

Press the be written. * If [ ALL] is selected, all sewing data will be written at

once.

or key to select the program number to

4577Q

BAS-311G, BAS-326G

3. READING / WRITING DATA

End data read/write mode

Writing

TEST indicator switches off

Press the R/W key.

• The buzzer will sound and the selected sewing data will be copied from the internal memory onto the floppy disk.

• The program numbers that have been written will appear in the menu display.

* If there is a large volume of data in the internal

memory, it will take some time for all of it to be written. To halt the writing of data, press the STOP switch. If you then press the RESET key, the display will change back to [ ALL].

Press the TEST key. Turn off the power and remove the floppy disk.

3-15. Reading extended option output data from a CF card

Select the [r 11] data read/write mode.

Press the R/W key.

• The buzzer will sound and the extended option output data will be loaded from the CF card and copied into the sewing machine's internal memory.

When [ End] is displayed, the process is complete. Turn off the power switch, remove the CF card, and then close the cover of the CF slot.

5065Q

5066Q

4498Q

4581Q

BAS-311G, BAS-326G

3. READING / WRITING DATA

3-16. Writing extended option output data to CF cards

End data read/write mode

Writing

TEST indicator switches off

Select the [w 12] data read/write mode.

Press the R/W key.

• The buzzer will sound and the extended option output data will be copied from the internal memory onto the CF card.

Press the TEST key. Turn off the power switch, remove the CF card, and then close the cover of the CF slot.

3-17. Reading extended option output data from floppy disks

5067Q

4579Q

Insert the floppy disk into the floppy disk drive.

1 2

Select the [r 13] data read/write mode.

5068Q

Press the R/W key.

• The buzzer will sound and the extended option output data will be loaded from the floppy disk and copied into the sewing machine's internal memory.

5069Q

When [ End] is displayed, the process is complete. Turn off the power and remove the floppy disk.

5070Q

BAS-311G, BAS-326G

4. MECHANICAL DESCRIPTIONS

The mechanisms operate in the order of the numbers given in the illustrations.

4-1. Needle bar and thread take-up mechanisms

4. MECHANICAL DESCRIPTIONS

5041Q

1. Motor assy

2. Upper shaft

3. Thread take-up crank

4. Needle bar crank

5. Needle bar connecting rod <5> Thread take-up lever assy

6. Needle bar clamp <6> Thread take-up support

7. Needle bar

4-2. Lower shaft and shuttle race mechanisms

5042Q

1. Motor assy

2. Upper shaft

3. Crank rod assy

4. Rock gear

5. Lower gear

6. Lower shaft

7. Driver

8. Shuttle hook

BAS-311G, BAS-326G

4. MECHANICAL DESCRIPTIONS

4-3. Work clamp lifter mechanism (Solenoid specifications)

1. Work clamp pulse moto

2. Work clamp driving gear

3. Work clamp cam gear

4. Work clamp cam

5. Work clamp driving lever

6. Work clamp lifter link

7. Work clamp lifter lever

8. Work clamp lifter plate assy

5044Q

5043Q

9. Slider

10. Work clamp lifter lever

11. Connecting rod

12. Connecting link

13. Work clamp lifter lever

14. Work clamp

BAS-311G, BAS-326G

4. MECHANICAL DESCRIPTIONS

4-4. Work clamp lifter mechanism (Pneumatic specifications)

1. Air cylinde

2. Work clamp lifter lever

3. Work clamp lifter lever

4. Work clamp

5045Q

4-5. Intermittent presser foot lifter mechanism

5046Q

1. Work clamp pulse moto

2. Work clamp driving gear

3. Work clamp cam gear

4. Stepping foot driving lever

5. Stepping clamp lifter rod

6. Stepping clamp lifter

7. Stepping clamp lifter link

8. Stepping clamp link

9. Stepping clamp link B

10. Presser bar clamp

11. Presser bar

12. Presser foot

BAS-311G, BAS-326G

4. MECHANICAL DESCRIPTIONS

4-6. Intermittent presser foot stroke mechanism

5047Q

1. Motor assy

2. Upper shaft

3. Stepping clamp cam

4. Stepping clamp connecting rod

5. Stepping clamp arm R

6. Stepping clamp arm F

7. Stepping clamp link A

8. Stepping clamp link A

9. Stepping clamp link B

10. Presser bar clamp

11. Presser bar

12. Presser foot

BAS-311G, BAS-326G

4-7. Feed mechanism

Sewing patterns are created through combinations of X and Y movements.

X direction

Y direction

4. MECHANICAL DESCRIPTIONS

5052Q

1. X-feed motor assy

2. Gear

3. X-feed gear

4. Y-ball spline

5. X-GT belt

6. Feed bracket X

5053Q

1. Y-feed motor L assy

2. Gear

3. Y-feed gear

4. Y-GT belt

5. Feed bracket assy

BAS-311G, BAS-326G

4. MECHANICAL DESCRIPTIONS

4-8. Thread trimmer mechanism

5048Q

1. Thread trimmer solenoid

2. Solenoid lever

3. Pushing lever

4. Driving lever

5. Thread trimmer collar

6. Thread trimmer cam

7. Thread trimmer rod V

8. Thread trimmer lever V

9. Thread trimmer lever H

10. Thread trimmer rod H

11. Movable knife lever

12. Movable knife connecting plate

13. Movable knife

14. Fixed knife

BAS-311G, BAS-326G

4-9. Tension release mechanism

5049Q

4. MECHANICAL DESCRIPTIONS

1. Tension release solenoid

2. Bolt

3. Tension release bar

4. Tension release pin

4-10. Thread wiper mechanism

5050Q

1. Thread wiper solenoid assy

2. Thread wiper rod

3. Thread wiper crank assy

4. Wiper

When the thread wiper solenoid assembly is turned off, the wiper operates in the opposite direction.

BAS-311G, BAS-326G

5. DISASSEMBLY

Disassembly should only be carried out by a qualified technician.

Turn off the power switch before carrying out disassembly. If the foot switch is depressed by mistake, the sewing machine might start operating and injury could result.

Disassemble each part in order of the numbers.

CAUTION

Use only the proper replacement parts as specified by Brother.

If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that they operate correctly before using the machine.

Any problems in machine operation which result from unauthorized modifications to the machine will not be covered by the warranty.

5-1. Covers

1. Top cove

2. Motor cover

3. Motor cover R

4. Motor cover L

5. Eye guard

6. Face plate

7. Shuttle race cover assy

5051Q

BAS-311G, BAS-326G

5-2. Thread wiper mechanism

5. DISASSEMBLY

5090Q

1. Thread wiper solenoid harness (Pull out)

2. STOP switch harness (Pull out)

3. Bolt

4. Plain washer

5. Removed washer (Assemble)

6. Removed bolt (Assemble)

7. Bolts with washer [2 pcs]

8. Thread wiper unit

BAS-311G, BAS-326G

5. DISASSEMBLY

5-3. Work clamp arm mechanism

Pneumatic specifications

5054Q

5055Q

1. Set screw

2. Needle

3. Needle bar thread guide

4. Bolts [4 pcs]

5. Work clamp assy

6. Bolts with washer [2pcs]

7. Feed plate

BAS-311G, BAS-326G

5-4. Intermittent presser foot lifter mechanism (1)

1. Adjusting screw nut (Loosen)

2. Presser adjusting screw

3. Presser bar spring guide

4. Presser bar spring

5. Presser bar spring collar

6. Screw

7. Shoulder screw

8. Screw

9. Plain washers [2 pcs]

10. Finger guard

11. Presser foot

12. Bolt (Loosen)

13. Presser bar (Pull downward from presser bar clamp)

14. Set screw (Loosen)

15. Link shaft (Pull out)

16. Washer

17. Stepping clamp lifter link (Remove as unit)

18. Presser bar

19. Bolt (Loosen)

20. Stepping clamp arm F

5. DISASSEMBLY

5091Q

BAS-311G, BAS-326G

5. DISASSEMBLY

5-5. Needle bar mechanism

Left-hand thread

1. Rubber cap

2. Screw

3. Needle bar

4. Needle bar clamp (Pull out)

5. Slide block

6. Rubber caps [2 pcs]

7. Set screws [2 pcs] (Loosen)

8. Thread take-up support shaft assy

9. Thread take-up support

10. Screw (Loosen)

5092Q

5093Q

Do not remove the slide block guide i possible to prevent the machine from overheating due to needle bar rubbing.

11. Needle bar connecting rod

12. Needle bearing

13. Rubber cap

14. Set screws [3 pcs] (Loosen)

15. Needle bar crank

16. Needle bearing

17. Thread take-up lever assy

18. Washer

19. Bolts [2 pcs]

20. Slide block guide

BAS-311G, BAS-326G

5-6. Upper shaft mechanism

Be careful not to drop the needle bearing.

1. Screw (Loosen)

2. Set screw (Loosen)

3. Thread take-up crank

4. Screws [3 pcs] (Loosen)

5. Crank cover

6. Bolts [2 pcs]

7. Crank rod [Upper part]

8. Needle bearing

9. Crank rod [Lower part] (Lower downward)

10. Rubber cap

11. Set screws [2 pcs] (Loosen)

12. Set screws [2 pcs] (Loosen)

13. Set screws [2 pcs] (Loosen)

14. Set screws [2 pcs] (Loosen)

15. Set screws [2 pcs] (Loosen)

5. DISASSEMBLY

If the motor assembly cannot be removed, insert bolts into these two tapping holes and gradually tighten them to remove the motor assembly.

5094Q

16. Set screws [2 pcs] (Loosen)

17. Set screws [2 pcs] (Loosen)

18. Set screws [2 pcs] (Loosen)

19. Screws [3 pcs] (Loosen)

20. Fries wheels [2 pcs]

21. Bolts [4 pcs] (Loosen)

22. Motor assy

23. Thread trimmer cam

24. Joint assy

25. Upper shaft

26. Pulley gear R

27. Bobbin winder driving wheel

28. Stepping clamp cam assy

29. Set screw (Loosen)

30. Pulley assy

BAS-311G, BAS-326G

5. DISASSEMBLY

5-7. Lower shaft mechanism

5095Q 5096Q

Remove the rock gear and the crank rod together as a single unit.

5098Q

If the adjusting stud will not pull out, insert a M3 screw into the tap hole and then pull out the adjusting stud.

1. Bolt (Loosen)

2. Driver

3. Retaining ring E

4. Set screw (Loosen)

5. Adjusting stud (Pull out)

6. Lower shaft assy [Pull out from the rear of the machine]

7. Adjusting stud (Pull out)

8. Set screw (Loosen)

9. Screw (Loosen)

10. Shuttle race base assy

5097Q

11. Set screws [2 pcs] (Loosen)

12. Set screw (Loosen)

13. Set screw collar, R

14. Set screws [2 pcs] (Loosen)

15. Set screw collar, B

16. Rock gear shaft [Pull out from the rear of the machine]

17. Rock gear

18. Crank rod [Lower part]

BAS-311G, BAS-326G

5-8. Feed covers

1. Bolts with washer [10 pcs]

2. Auxiliary plate

3. Screws [4 pcs]

4. Bellow assy

5. Screws [2 pcs]

6. Cover connecting plate

7. Screws [16 pcs]

8. Cover rails [2 pcs]

9. Inside covers [2 pcs]

10. Outside covers [2 pcs]

11. Fixed covers [2 pcs]

5. DISASSEMBLY

5101Q

5102Q

BAS-311G, BAS-326G

5. DISASSEMBLY

5-9. Feed mechanism

5104Q

5103Q

BAS-311G, BAS-326G

1. Bolts with washer [2 pcs] (Loosen)

2. Screws [5 pcs], flat screws [3 pcs]

3. Oil cover

4. Screws with washer [4 pcs]

5. Y belt cover

6. Bolts with washer [3 pcs]

7. Y-feed motor L assy

8. Set screws [2 pcs] (Loosen)

9. Y-feed gear

10. Retaining ring E

11. Set screws [2 pcs] (Loosen)

12. Y-pulley driving shaft

13. Y-pulley assy

14. Y-pulley collar

15. Ball bearings [2 pcs]

16. Bolts [4 pcs]

17. Bolts [4 pcs]

18. Y-belt presser plate

19. Y-belt support plate

20. Set screws [2 pcs] (Loosen)

21. Y-pulley bracket

22. Y-pulley fulcrum shaft

23. Y-pulley assy

24. Y-GT belt

25. Ball bearings [2 pcs]

5105Q

5. DISASSEMBLY

5117Q

26. Bolts with washer [3 pcs]

27. X-feed motor assy

28. Set screws [2 pcs] (Loosen)

29. X-feed gear

30. Rubber cap

31. Y-ball spline

32. Retaining ring C

33. Plain washer

34. Ball bearing

35. Ball bearings [2 pcs]

36. Bolts [4 pcs]

37. Washers [4 pcs]

38. Bolts [8 pcs]

39. Spring washers [8 pcs]

40. Plain washers [8 pcs]

41. Y-LM guides [2 pcs]

42. Flat screws [16 pcs]

43. Y-LM spacers [2 pcs]

5106Q

5107Q

BAS-311G, BAS-326G

5. DISASSEMBLY

44. Bolts [10 pcs]

45. Flat screws [8 pcs]

46. Feed bracket X

47. Bolts [16 pcs]

48. X-LM guide [2 pcs]

49. Bolts [2 pcs]

50. X-belt holder

51. X-belt holder plate

52. Bolts [2 pcs]

53. Plain washers [2 pcs]

54. Set screws [2 pcs] (Loosen)

55. X-pulley fulcrum shaft

56. X-pulley bracket

57. X-right pulley assy

58. Plain washer

59. X-GT belt

5118Q

BAS-311G, BAS-326G

5-10. Work clamp lifter mechanism (Solenoid specifications)

1. Shoulder screw

2. Work clamp spring

3. Rubber cap

4. Link shoulder screws [2 pcs]

5. Work clamp lifter link (Pull backward)

6. Bolts [4 pcs]

7. Work clamp pulse motor (Disconnect the harness)

8. Set screws [2 pcs] (Loosen)

9. Work clamp driving gear

10. Bolts [2 pcs]

11. Work clamp motor plate

12. Set screw (Loosen)

13. Work clamp lever shaft

14. Work clamp driving leve

15. Washer

16. Stepping foot driving lever

17. Set screws [2 pcs] (Loosen)

18. Set screws [2 pcs] (Loosen)

19. Screw

20. Plain washer

21. Retaining ring C

22. Work clamp fulcrum shaft

23. Work clamp cam gear

24. Work clamp cam

25. Ball bearings [2 pcs]

5. DISASSEMBLY

5108Q

BAS-311G, BAS-326G

5. DISASSEMBLY

26. Set screws [2 pcs] (Loosen)

27. Retaining ring E

28. Work clamp lever shaft B

29. Plain washer

30. Work clamp lifter lever

31. Slide block

32. Work clamp lifter plate assy

33. Bolts [4 pcs]

34. Slide bush

Note:

Hold the work clamp lifter plate assembly when removing work clamp lifter lever, otherwise the work clamp lifter plate assembly may fall down.

5109Q

5-11. Work clamp lifter mechanism (Pneumatic specifications)

1. Shoulder screw

2. Bolts [4 pcs]

3. Work clamp pulse motor (Disconnect the harness)

4. Set screws [2 pcs] (Loosen)

5. Work clamp driving gear

6. Bolts [2 pcs]

7. Work clamp motor plate

8. Set screws [2 pcs] (Loosen)

9. Set screw

10. Work clamp lever shaft

11. Set screw collar

12. Stepping foot driving lever

13. Set screw (Loosen)

14. Set screw (Loosen)

15. Screw

16. Plain washer

17. Retaining ring C

18. Work clamp fulcrum shaft

19. Work clamp cam gear

20. Ball bearings [2 pcs]

5110Q

BAS-311G, BAS-326G

5-12. Tension release mechanism

5. DISASSEMBLY

1. Set screw (Loosen)

2. Tension bracket assy (Pull out)

3. Tension release pin

4. Shoulder screws [2 pcs]

5. O rings [2 pcs]

6. Solenoid cover

7. Tension release solenoid

8. Bolts [2 pcs]

9. Spring washers [2 pcs]

10. Plain washers [2 pcs]

11. Solenoid setting plate

12. Bolt

13. Nut

14. Plain washer

15. Solenoid cushion

16. Tension release bar

17. Plain washer

18. Spring

19. Retaining ring E

5111Q

5-13. Intermittent presser foot lifter mechanism (2)

5112Q

1. Flat screw

2. Set screw (Loosen)

3. Stepping clamp lifter shaft (Pull out)

4. Stepping clamp lifter (Pull forward)

BAS-311G, BAS-326G

5. DISASSEMBLY

5-14. Thread trimmer mechanism

1. Set screws [2 pcs] (Loosen)

2. Thread trimmer cam

3. Screws [3 pcs]

4. Fan

5. Bolts with washer [2 pcs]

6. Set screw

7. Solenoid lever

8. Washer

9. Solenoid cushion

10. Bolts [2 pcs]

11. Spring washers [2 pcs]

12. Plain washers [2 pcs]

13. Solenoid setting plate

14. Thread trimmer solenoid

15. Shoulder screw

16. Pushing lever

17. Nut

18. Set screw

19. Set screw

20. Guide shaft

21. Spring

22. Cushion

5113Q

5114Q

23. Nut

24. Shoulder screw B

25. Driving lever

26. Set screw

27. Retaining ring E

28. Collar shaft

29. Thread trimmer collar

30. Screws [2 pcs]

31. Flat screws [2 pcs]

32. Needle plate

BAS-311G, BAS-326G

33. Movable knife shoulder screw

34. Thrust washer

35. Movable knife collar

36. Movable knife assy

37. Movable knife spacer

38. Screws [2 pcs]

39. Plain washers [2 pcs]

40. Fixed knife

41. Shoulder screw

42. Connecting plate

43. Spring hook

44. Spring

45. Bolt

46. Spring washer

47. Plain washer

48. Nut

49. Shoulder screw B

50. Thread trimmer rod V

51. Nut

52. Shoulder screw B

53. Set screws [2 pcs] (Loosen)

54. Thread trimmer lever shaft

55. Spacers [2 pcs]

56. Retaining ring, C

5. DISASSEMBLY

5115Q

57. Thread trimmer lever V

58. Thread trimmer lever H

59. Set screw (Loosen)

60. Movable knife lever shaft

61. Movable knife lever

62. Shoulder screw

63. Thread trimmer rod H

5-15. Shuttle hook mechanism

BAS-311G, BAS-326G

5116Q

1. Bobbin case assy

2. Shuttle race base setting claw [Open to right and left]

3. Shuttle race base

4. Shuttle hook

6. ASSEMBLY

ssemble each part in order of the numbers.

Apply grease to the required places when reassembling the parts and once every two years.

6-1. Thread trimmer mechanism (1)

Apply grease <GREASE BZL-301 (SA2694-001)> specified by Brother to the portions indicated by the white arrows.

When the ball joint assembly of thread trimmer rod H has been disassembled, assemble it so that the distance between the centers of the holes is 376

0.5 mm.

5134Q

Tighten the set screw on the screw flat while lightly pressing the movable knife lever shaft.

1. Movable knife leve

2. Thread trimmer rod H

3. Shoulder screw

4. Movable knife lever shaft

5. Set screw

6. Thread trimmer lever shaft

7. Retaining ring, C

8. Spacers [2 pcs]

Tighten the set screw on the screw flat while lightl pressing the thread trimmer lever shaft.

9. Thread trimmer lever H

10. Thread trimmer lever V

11. Set screws [2 pcs]

12. Shoulder screw B

13. Nut

14. Spring

15. Spring hook

5135Q

BAS-311G, BAS-326G

Tighten the set screw on the scre flat while lightly pressing the colla shaft. Check that the thread trimmer colla turns smoothly.

4853Q

Apply grease.

16. Driving leve

17. Thread trimmer collar

18. Collar shaft

19. Retaining ring, E

20. Set screw

21. Thread trimmer rod V

22. Shoulder screw B

23. Nut

24. Guide shaft

25. Spring

26. Cushion

27. Set screw

28. Thread trimmer solenoid

29. Solenoid setting plate

30. Plain washers [2 pcs]

31. Spring washers [2 pcs]

32. Bolts [2 pcs]

ssemble so that the wick is

hanging down.

33. Solenoid cushion

34. Washer

35. Solenoid lever

36. Set screw

37. Bolts with washer [2 pcs]

38. Pushing lever

39. Shoulder screw

40. Set screw

41. Nut

42. Connecting plate

43. Shoulder screw

44. Shoulder screw B

45. Nut

46. Plain washer

47. Spring washer

48. Bolt

6. ASSEMBLY

5136Q

When the ball joint assembly o thread trimmer rod V has been disassembled, assemble it so tha the distance between the centers o the holes is 287.5 ± 0.5 mm.

4615Q

BAS-311G, BAS-326G

6. ASSEMBLY

6-2. Intermittent presser foot lifter mechanism (1)

Tighten the set screw on the screw flat while lightly pressing the stepping clamp lifter shaft.

Screw the stepping clamp lifter rod in as far as it will go, then turn it back 3 times.

1. Stepping clamp lifter (Insert from the front)

2. Stepping clamp lifter shaft

3. Set screw

4. Flat screw

5138Q

Place the oil tube into the groove.

5137Q

6-3. Tension release mechanism

5139Q

djust while referring to “7-18. Adjusting

the tension release amount”.

djust the thread take-up spring height while referring to “7-2. Standard thread tension”.

1. Tension release ba

2. Retaining ring, E

3. Plain washer

4. Spring

5. Tension release solenoid

6. Solenoid setting plate

7. Solenoid cushion

8. Plain washer

9. Nut

10. Bolt

11. Plain washers [2 pcs]

12. Spring washers [2 pcs]

13. Bolts [2 pcs]

14. Solenoid cover

15. O rings [2 pcs]

16. Shoulder screws [2 pcs]

17. Tension release pin

18. Tension bracket

19. Set screw

BAS-311G, BAS-326G

6. ASSEMBLY

6-4. Work clamp lifter mechanism (Solenoid specifications)

Apply grease <GREASE BZL-301 (SA2694-001)> specified by Brother to the portions indicated by the white arrows.

1. Ball bearings [2 pcs]

2. Work clamp cam

3. Work clamp cam gear

4. Work clamp fulcrum shaft

5. Retaining ring C

6. Plain washer

7. Screw

8. Set screws [2 pcs]

9. Set screws [2 pcs]

10. Work clamp driving lever

11. Plain washer

12. Stepping foot driving lever

13. Work clamp lever shaft

14. Set screw

15. Work clamp lifter link (Insert from the back)

16. Link shoulder screw

17. Shoulder screw

lign the screw stop, and then tighten the screw so that there is no play in the work clamp driving lever and the stepping foot driving lever. Check that the work clamp driving lever and stepping foot driving leve turn smoothly.

1) Set the work clamp cam gear so that there is no clearance between it and the ball bearing in the shaft direction, and then align the V groove in the work clamp fulcrum shaft with the thread on the hole side of the work clamp cam gear. Then tighten the set screw.

2) Set the work clamp cam so that there is no clearance between it and the work clamp cam gea in the shaft direction, and then align the V groove in the work clamp fulcrum shaft with the index mark on the work clamp cam. Then tighten the set screw.

3) Lastly, tighten the two set screws (9).

Index mark

5159Q

5161Q5160Q

BAS-311G, BAS-326G

6. ASSEMBLY

5162Q

Place the slide block onto the pin of the work clamp lifter lever. The pin and the surface of the slide block should be aligned. While aligning the slide block with the groove in the work clamp lifter plate assembly, pass the work clamp lever shaft B through the work clamp lifter lever.

NOTE:

When the work clamp lifter plate assembly is lowered, the slide block moves away, so hold the work clamp lifter plate assembly in place until the link shoulder screw is tightened.

18. Slide bush

19. Bolts [4 pcs]

20. Work clamp lifter plate assy

21. Slide block

22. Work clamp lifter lever

23. Work clamp lever shaft B

24. Plain washer

25. Retaining ring E

26. Set screws [2 pcs]

27. Link shoulder screw

28. Rubber cap

lign the set screw with the screw stop and then tighten it so that there is no play in the work clamp lifter lever. Check tha the work clamp lifter lever moves smoothly.

Align

5163Q

BAS-311G, BAS-326G

1) With the screw stop of the work clamp pulse motor facing downward and the index mark on the work clamp driving gea facing to the right, adjust so that the clearance between the work clamp pulse motor and the work clamp driving gear is 6.2 mm, and then tighten the two set screws.

Index mark

Index mar

2) Install the work clamp pulse motor to the work clamp motor plate with the four bolts so that the moto connector is facing downward.

3) Align the index marks on the work clamp cam gea and the work clamp driving gear, and then install the work clamp motor plate with the two bolts so tha there is no backlash.

5167Q

5164Q

6. ASSEMBLY

5165Q

Hook the spring into the arm hole as shown in the illustration.

5166Q

29. Work clamp pulse moto

30. Work clamp driving gea

31. Set screws [2 pcs]

32. Work clamp motor plate

33. Bolts [4 pcs]

34. Bolts [2 pcs]

35. Work clamp spring

BAS-311G, BAS-326G

6. ASSEMBLY

6-5. Work clamp lifter mechanism (Pneumatic specifications)

Apply grease <GREASE BZL-301 (SA2694-001)> specified by Brother to the portions indicated by the white arrows.

Set the work clamp cam gear so that there is no clearance between it and the ball bearing in the shaf direction, and then align the V groove in the work clamp fulcrum shaft with the thread on the hole side of the work clamp cam gear. Then tighten the set screw.

lign the screw stop, and then tighten the screw so that there is no play in the stepping foot driving lever and the set screw collar. Check that the stepping foot driving lever turns smoothly.

1. Ball bearings [2 pcs]

2. Work clamp cam gear

3. Work clamp fulcrum shaft

4. Retaining ring C

5. Plain washer

6. Screw

7. Set screw

8. Set screw

9. Stepping foot driving lever

10. Set screw collar

11. Work clamp lever shaft

12. Set screw

13. Set screws [2 pcs]

14. Shoulder screw

5168Q

5169Q

BAS-311G, BAS-326G

Index mark

2) Install the work clamp pulse motor to the work clamp motor plate with the four bolts so that the moto connector is facing downward.

3) Align the index marks on the work clamp cam gea and the work clamp driving gear, and then install the work clamp motor plate with the two bolts so tha there is no backlash.

5171Q

6. ASSEMBLY

5170Q

5172Q

15. Work clamp pulse moto

16. Work clamp driving gear

17. Set screws [2 pcs]

18. Work clamp motor plate

19. Bolts [4 pcs]

20. Bolts [2 pcs]

BAS-311G, BAS-326G

6. ASSEMBLY

6-6. Feed mechanism

Apply grease (AFC manufactured by THK or equivalent) to the areas indicated by the white arrows.

5173Q

8. X-feed gea

9. Ball bearings [2 pcs]

10. Y-ball spline

11. Set screws [2 pcs]

12. Ball bearing

13. Plain washer

14. Retaining ring C

5175Q

NOTE:

lign the ridges in the packing of the nu with the grooves in the shaft when inserting the shaft. If they are not aligned, the steel balls inside the nut will fall out.

1. X-pulley bracket

2. X-GT belt

3. X-right pulley assy

4. Ball bearings [2 pcs]

5. Plain washer

6. X-pulley fulcrum shaft

7. Set screws [2 pcs]

Packing

15. Retaining rings C [2 pcs]

16. Plain washers [2 pcs]

17. Bolts [2 pcs] (Temporarily tighten)

5174Q

BAS-311G, BAS-326G

Engage.

Push the X-LM guide against the positioning pins of the feed bracket and then tighten the bolts.

Install the X-belt holder in between the X-LM guides as shown in the diagram.

5215Q

Provisionally tighten the bolts so that their heads do not protrude from the top of the X-LM guide on the inside.

18. Y-LM spacers [2 pcs]

19. Flat screws [16 pcs]

20. Y-LM guides [2 pcs]

21. Plain washers [8 pcs]

22. Spring washers [8 pcs]

23. Bolts [8 pcs]

24. X-LM guide [2 pcs]

25. Bolts [8 pcs]

6. ASSEMBLY

5176Q

5177Q

26. Feed bracket X

27. Bolts M3X6 [8 pcs]

28. Bolts M4X8 [2 pcs]

29. Flat screws [8 pcs]

30. X-belt holder

31. X-belt holder plate

32. Bolts [2 pcs]

BAS-311G, BAS-326G

6. ASSEMBLY

33. Y-pulley bracket

34. Ball bearings [2 pcs]

35. Y-pulley assy

36. Y-GT belt

37. Y-pulley fulcrum shaft

38. Set screws [2 pcs]

39. Y-belt support plate

40. Y-belt presser plate

Place the Y-LM guide against the wall of the bed, and then tighten the bolts.

5179Q

Engage.

41. Bolts [4 pcs]

42. Y-pulley assy

43. Y-pulley collar

44. Ball bearings [2 pcs]

45. Y-feed gear

46. Y-pulley driving shaft

47. Retaining ring E

48. Set screws [4 pcs]

5178Q

Provisionally tighten the bolts so that their heads do not protrude from the top of the Y-LM guide a the right.

49. Washers [4 pcs]

50. Bolts [4 pcs]

51. Bolts [4 pcs]

52. Bolts with washers [2 pcs] (Temporarily tighten)

BAS-311G, BAS-326G

6. ASSEMBLY

–

Install so that the backlash is 0.01

0.05.

5180Q

Install so that the backlash is 0.01

0.05.

53. X-feed motor assy

54. Bolts with washer [3 pcs] (Temporarily tighten)

55. Y-feed motor L assy

56. Bolts with washer [3 pcs] (Temporarily tighten)

57. Y belt cover

58. Screws with washer [4 pcs]

59. Oil cover

60. Screws [5 pcs]

61. Flat screws [3 pcs]

5181Q

BAS-311G, BAS-326G

6. ASSEMBLY

<X-GT belt tension adjustment>

Measurement position

5183Q

1. Move the X feed bracket (1) so that it is in the middle of the sewing area in the Y direction and at the left edge of the sewing area in the X direction.

2. Loosen the two bolts (3) of the X-pulley bracket (2), and then provisionally tighten them at 19.6 mN·m.

3. Pass the M5x25 screw through the countersunk hole in the side of the bed and screw it into the tap hold in the X-pulley bracket (2). Then adjust the belt tension to the following value. [For a new belt: 290 – 330 N; For a reused belt: 220 – 250 N]

4. Tighten the two bolts (3), and then remove the M5x25 screw.

5. Measure the belt tension once more and check that it is at the following value. [For a new belt: 400 – 440 N; For a reused belt: 320 – 350 N]

* Be sure to use a belt tension gauge to measure the belt tension, and measure from the bottom of the belt. * The belt tension gauge should be set to measure a unit weight of 0.04 kg/m, a belt width of 30 mm and a span length of

370 mm.

* The recommended belt tension gauge to use is the Dr. TENSION TYPE-ll manufactured by MITSUBOSHI BELTING

LTD.

BAS-311G, BAS-326G

6. ASSEMBLY

<Y-GT belt tension adjustment>

Measurement position

5184Q

1. Move the X feed bracket (1) so that it is in the middle of the sewing area in the Y direction and at the left edge of the sewing area in the X direction.

2. Loosen the two bolts (3) of the Y-pulley bracket (2), and then provisionally tighten them at 19.6 mN·m.

3. Pass the M5x25 screw through the countersunk hole in the side of the bed and screw it into the tap hold in the Y-pulley bracket (2). Then adjust the belt tension to the following value. [For a new belt: 250 – 320 N; For a reused belt: 160 – 240 N]

4. Tighten the two bolts (3), and then remove the M5x25 screw.

5. Measure the belt tension once more and check that it is at the following value. [For a new belt: 500 – 600 N; For a reused belt: 400 – 480 N]

370 mm.

* The recommended belt tension gauge to use is the Dr. TENSION TYPE-ll manufactured by MITSUBOSHI BELTING

LTD.

BAS-311G, BAS-326G

6. ASSEMBLY

5185Q

5186Q

1. With tension applied to the X-GT belt and the X-feed motor assembly installed, use a push-pull tension gauge to push the X feed bracket (1) from one edge to the other in the X direction.

2. Tighten the eight bolts (2) at the place where the load is 29 – 59 N (variation within 20 N).

1. With tension applied to the Y-GT belt and the Y-feed motor L assembly installed, use a push-pull tension gauge to push the X feed bracket (1) from one edge to the other in the Y direction.

2. Tighten the two bolts (2) at the place where the load is 39 – 78 N (variation within 20 N).

BAS-311G, BAS-326G

6-7. Feed covers

1) Place the inside cover into the groove in the X feed bracket. Apply grease (MOLYKOTE LONGTERM W2 manufactured by Dow Corning or equivalent) to the areas indicated by the white arrows.

Feed bracket X

2) Set so that the rubber part of the inside cover is on the outside of the rubber part of the outside cover and so that the stopper of the inside cover is on the inside of the fixed cover.

5188Q 5189Q

1. Fixed cover R

2. Fixed cover L

3. Cover rail

4. Screws M4X10 [6 pcs]

5. Screws M4X4 [2 pcs]

6. Inside cover R assy (Place into cover rail.)

7. Inside cover L assy (Place into cover rail.)

8. Outside cover assemblies [2 pcs] (Place into cover rail.)

9. Cover connecting plate

10. Screws [2 pcs]

11. Cover rail

12. Screws M4X10 [6 pcs]

13. Screws M4X4 [2 pcs]

14. Bellow assy

15. Screws [4 pcs]

6. ASSEMBLY

Place the inside cover into the upper cove rail, and place the outside cover into the lowe cover rail.

5187Q

5190Q

BAS-311G, BAS-326G

6. ASSEMBLY

5191Q

Needle plate

5193Q

fter installing, carry out the adjustments in "7-20-2. X-Y feed home position ".

5192Q

16. Auxiliary plate brackets [6 pcs]

17. Bolts with washer [6 pcs]

18. Auxiliary plate

19. Support plate guides [2 pcs]

20. Auxiliary plate cushions [10 pcs]

21. Screws [10 pcs] (Tighten to 0.5 N·m.)

22. Nuts [10 pcs]

23. Bolts with washer [4 pcs]

BAS-311G, BAS-326G

6-8. Upper shaft mechanism

1） Tighten the screw of the thread take-up crank so tha

it is aligned with the upper shaft hole.

2） While pressing the thread take-up crank so that there

is no play in it, tighten the two set screws (8).

pply adhesive (Threebond 1401 or similar) to the thread

section of the screw.

Install the bobbin winder driving wheel so that it is in phase with the thread take-up crank and aligned with the reference line on the uppe shaft.

6. ASSEMBLY

pply adhesive (Threebond 1324 or similar) to the

outside of the bearing of joint assy.

5140Q

Reference line

5204Q

1. Upper shaft

2. Pulley gear R

3. Bobbin winder driving wheel

4. Stepping clamp cam assy

5. Thread take-up crank

6. Screw

7. Set screw

8. Set screws [2 pcs]

9. Set screws [2 pcs]

10. Rubber cap

11. Set screws [2 pcs]

12. Joint assy

13. Set screws [2 pcs]

BAS-311G, BAS-326G

6. ASSEMBLY

djust while referring to “6-10. Intermitten

presser foot lifter mechanism (2)”.

14. Motor assy

15. Bolts [4 pcs]

16. Fries wheels [2 pcs]

17. Screws [3 pcs]

18. Set screws [2 pcs]

19. Thread trimmer cam

20. Set screws [2 pcs]

21. Set screws [2 pcs]

22. Set screws [2 pcs] (Temporarily tighten)

23. Pulley assy

24. Set screw

Tighten the set screw so that the screw stop A on the motor shaft is in the same phase as the screw stop B on the thread trimmer cam. Tighten the set screw so that the screw stop C on the upper shaft is at a phase of approximately 180 degrees from the screw stop A on the motor shaft.

4644Q

Install the motor assembly so that the harness is facing downward.

5141Q

1） Align the index mark D on the thread trimmer cam and

the index mark E on the joint assembly, and then provisionally tighten the set screw at the index mar side.

2） After tightening the set screw at the screw stop side,

fully tighten the set screw at the index mark side.

3） Carry out the adjustments in "7-17. Adjusting the

thread trimmer cam position".

pply the specified grease (GREASE BZL-301) to the

grooves.

5182Q

BAS-311G, BAS-326G

6. ASSEMBLY

6-9. Needle bar mechanism

Apply grease <GREASE BZL-301 (SA2694-001)> specified by Brother to the portions indicated by the white arrows.

Inside hole

Left-hand thread

Fit the chamfering side of the slide block into the groove on the slide block guide.

Set so that this hole faces upward, and then push in gently while tightening the set screw to install.

fter securing the needle bar, position the slide block guide so that the machine pulle turns smoothly, and then tighten the bolts.

1. Slide block guide

2. Bolts [2 pcs] (Temporarily tighten)

3. Washer

4. Thread take-up lever assy

5. Needle bearing

6. Needle bar crank

7. Set screws [2 pcs]

8. Set screw

9. Needle bearing

5142Q

While gently pushing the needle ba crank in the shaft direction, align the set screw with the screw stop and then tighten the set screw.

10. Needle bearing

11. Screw

12. Thread take-up support

13. Thread take-up support shaft assy

14. Set screws [2 pcs]

15. Rubber caps [2 pcs]

16. Rubber cap

17. Slide block

BAS-311G, BAS-326G

6. ASSEMBLY

Inside hole

Cut section

lign the needle bar so that reference line A (the second lowest reference line on the needle bar) or reference line a (top reference line) is aligned with the lower edge of the needle bar bush when the machine pulley is turned to raise the needle bar from its lowest position, and then set the cut section so that it is facing forward and tighten the screw.

4647Q

18. Needle bar clamp

19. Needle bar (Insert from above)

20. Screw

21. Rubber cap

5143Q

Needle bar bush

BAS-311G, BAS-326G

6-10. Intermittent presser foot lifter mechanism (2)

Install the presser bar spring collar as shown in the illustration, and then adjust the height of the presser adjusting screw to 32 mm.

Notes on the installation position (Refer to “7-13. Changing the intermittent stroke”.)

Tighten the set screw on the screw fla while lightly pressing the link shaft.

5194Q

5195Q

1) With the needle bar lowered approximately 6.5 mm from its highest position, set the stepping clamp arm F to the position of the straight line in the illustration.

2) Place a bushing in between stepping clamp arm F and stepping clamp arm R so that there is no play, and then tighten the bolt.

5196Q

6. ASSEMBLY

t the needle bar timing position, align the index marks of the stepping clamp cam and the stepping clamp connecting rod, and then tighten the set screw.

5197Q

1. Stepping clamp arm F

2. Stepping clamp arm R

3. Set screws [2 pcs]

4. Bolt

5. Presser bar clamp

6. Presser bar

7. Bolt (Temporarily tighten)

8. Stepping clamp lifter link

9. Washer

10. Link shaft (with retaining ring)

11. Set screw

12. Shoulder screw

13. Screw

14. Shoulder screw

15. Screw

16. Presser bar spring collar

17. Presser bar spring

18. Presser bar spring guide

19. Adjusting screw nut

20. Presser adjusting screw

21. Presser foot

22. Plain washers [2 pcs]

23. Finger guard

24. Screw (Temporarily tighten)

BAS-311G, BAS-326G

6. ASSEMBLY

After installing the needle plate while referring to “6-13. Thread trimmer mechanism (2)”, carry out the following adjustments.

5198Q

5199Q

1. Turn the work clamp cam gear (1) to move the stepping foot driving lever (2) to the solid line position shown in the illustration.

2. Loosen the two nuts (4) and turn the joint (5) to adjust the height of the roller (3) so that it is 155.5 mm above the top of the needle plate.

3. Lower the needle bar approximately 6.5 mm from its highest position.

4. Set the height of the presser bar (6) to 41 mm above the needle plate, align the center of the presser foot (7) and the needle hole, and then tighten the bolt (8).

5. Set the height of the presser foot (7) to 22 mm above the needle plate, and then tighten the screw (9).

6. Turn the work clamp cam gear (1) to move the stepping foot driving lever (2) to the dotted line position shown in the illustration.

7. Set the needle bar to the timing position.

8. Loosen the nut (10) and turn the bolt (11) to set the height of the presser foot (7) to 0.5 mm above the needle plate.

BAS-311G, BAS-326G

6-11. Lower shaft mechanism

Tighten the set screw until the head o the screw is flush with the edge of the bed. (Refer to “7-8. Rotary hoo lubrication amount”.)

1. Shuttle race base assy

2. Set screw

3. Set screw

4. Adjusting stud

djust while referring to “7-19. Adjusting

the backlash of the lower shaft gear”.

6. ASSEMBLY

5144Q

While turning the machine pulley, move the rock gear back and forth to the position where it turns smoothly. Place set screw collar R against the edge of the bed and tighten the set screw.

5145Q

5. Rock gear shaft (Insert from the rear of the machine head)

6. Rock gear

7. Set screw collar, B

8. Set screws [2 pcs]

9. Set screw collar, R

10. Set screw (Temporarily tighten)

11. Set screws [2 pcs] (Temporarily tighten)

BAS-311G, BAS-326G

6. ASSEMBLY

5146Q

Provisionally tighten the bolt while lightl pressing the driver against the retaining ring.

Mating

mar

Insert the crank rod (lower part) into the crank of the upper shaft, and then align the mating mark on the crank rod (upper part) from above and gently tighten the bolts. * Check that the machine pulley turns smoothly.

12. Lower shaft assy (Insert from the rear of the machine head)

13. Retaining ring E

14. Driver

15. Bolt (Temporarily tighten)

16. Adjusting stud

17. Set screw

18. Crank rod [Lower part] (Insert into upper shaft crank)

19. Needle bearing

20. Crank rod [Upper part] (Align the mating mark)

21. Bolts [2 pcs]

22. Crank cover

23. Screws [3 pcs]

5147Q

5148Q

BAS-311G, BAS-326G

6-12. Shuttle hook mechanism

5149Q

fter installing the shuttle hook, carry out the adjustments in “7-4. djusting the needle bar lift amount”, “7-5. Adjusting the driver needle

guard” and “7-6. Adjusting the needle clearance”.

6. ASSEMBLY

5150Q

1. Needle bar thread guide

2. Needle

3. Set screw

4. Shuttle hook

5. Shuttle race base

6. Shuttle race base setting claw (Close)

7. Bobbin

8. Bobbin case

6-13. Thread trimmer mechanism (2)

Apply grease <GREASE BZL-301 (SA2694-001)> specified by Brother to the portions indicated by the white arrows.

5151Q

1. Fixed knife

2. Plain washers [2 pcs]

3. Screws [2 pcs]

4. Movable knife spacer

5. Movable knife assy

6. Movable knife collar

7. Thrust washer

8. Movable knife shoulder screw

9. Needle plate

10. Screws [2 pcs]

11. Flat screws [2 pcs]

Movable knife connecting plate

Insert the pin of the movable knife assembly into the hole in the movable knife connecting plate, and then install the needle plate with the screws and flat screws so that the needle drops into the center of the needle hole.

5152Q

BAS-311G, BAS-326G

6. ASSEMBLY

6-14. Work clamp arm mechanism

Pneumatic specifications

5200Q

1. Feed plate

2. Bolts with washer [2pcs]

3. Work clamp assy

4. Plain washers [4 pcs]

5. Spring washers [4 pcs]

5201Q

fter installing, carry out test feeding and check that the needle hole is inside the work clamp and the feed plate

frame. If the needle hole is not inside the frame, adjust the position of the work clamp arm assembly and feed plate.

6. Bolts [4 pcs]

BAS-311G, BAS-326G

6. ASSEMBLY

6-14-1. Adjustments after work clamp arm installation

Solenoid specifications

5202Q 5203Q

1. Screw in the M4 tap (1) on the side of the work clamp arm to apply pressure.

2. Adjust so that the sliding load of the retainers (2) is 40 – 80 N.

1. Set the work clamp height to “25” on the operation panel.

2. Loosen the bolt (3).

3. Set the height of the work clamp (4) to 25 mm above the top of the needle plate, and with the stopper (5) touching the connecting link (6), tighten the bolt (3).

1. Raise the work clamp arm electronically.

2. Loosen the bolt (7), lift the work clamp lifter lever (8) by hand to its maximum height, and then tighten the bolt (7).

3. Loosen the nut (9) of the air cylinder.

4. Turn the shaft of the air cylinder until the work clamp (10) is 30 mm above the top of the needle plate, and then tighten the nut (9).

1. Loosen the bolt (11).

2. Lower the work clamp arm electronically, and in that condition, tighten the work clamp (12) with the bolt (11).

1. Loosen the nut (13), and tighten the set screw (14). (Up to a maximum of 0.3 mm)

2. When the work clamp pressure is even at the front and back of the work clamp, tighten the nut (13).

Pneumatic specifications

BAS-311G, BAS-326G

6. ASSEMBLY

6-15. Thread wiper mechanism

lign the thread wiper shaft bracke and the bottom of the arm and then tighten the two bolts with washer.

1. Thread wiper unit

2. Bolts with washer [2 pcs]

3. Bolt (Remove)

4. Plain washer (Remove)

5. Removed plain washer

6. Removed bolt

7. STOP switch harness

8. Thread wiper solenoid harness

djust the thread wiper after installing. (Refer to “7-11. Adjusting the thread wiper”.)

5153Q

BAS-311G, BAS-326G

6-16. Covers

1. Shuttle race cove

2. Screws [2 pcs]

3. Face plate assy

4. Screws [3 pcs]

5. Eye guard assy

6. Plain washers [2 pcs]

7. Screws [2 pcs]

assy

8. Motor cover L

9. Screws [4 pcs]

10. Motor cover R

11. Screws [4 pcs]

12. Motor cover

13. Screws [4 pcs]

14. Top cover

15. Screws [6 pcs]

6. ASSEMBLY

5154Q

BAS-311G, BAS-326G

7. ADJUSTMENT

CAUTION

Maintenance and inspection of the sewing machine should only be carried out by a qualified technician.

Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system.

• Inspection, adjustment and maintenance

• Replacing consumable parts such as the rotary

hook

7-1. Checking the machine head switch

Check that the machine head switch is turned on as shown in the illustration.

NOTE:

5226Q

Hold the machine head with both hands when tilting it back or returning it to its original position. In addition, do not apply excessive force when tilting back the machine head. The sewing machine may become unbalanced and fall down, and serious injury or damage to the sewing machine may result.

If the power switch needs to be left on when carrying out some adjustment, be extremely careful to observe all safety precautions.

If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that they operate correctly before using the machine.

If the machine head switch is not turned on, errors "E050", "E051" and "E055" will be generated.

BAS-311G, BAS-326G

7-2. Standard thread tension

Specifications Heavy-weight materials (-01) Medium-weight materials (-02)

Upper thread #20 or similar #50 or similar

Lower thread #20 or similar #50 or similar

7. ADJUSTMENT

Upper thread tension (N)

Lower thread tension (N)

Thread take-up spring height

(mm)

Thread take-up spring

tension (N)

Pre-tension (N)

Needle DP x 17 #19 DP x 5 #16

Normal sewing speed 2,000 rpm 2,000 rpm

1.4 − 1.8 0.8 − 1.2

0.2 − 0.3

7 − 10

0.6 − 1.2 0.2 − 0.5

0.1 − 0.6 0.1 − 0.3

7-2-1. Upper and lower thread tension

5155Q4661Q

BAS-311G, BAS-326G

7. ADJUSTMENT

7-2-2. Thread take-up spring

Lower

4664Q

Turn the tension stud (2) with a screwdriver to adjust the tension.

Higher

5022Q

Loosen the set screw (1) and turn the adjuster to adjust.

Stronger

Weaker

5023Q

NOTE:

If the thread tension spring is not adjusted correctly, the upper thread trailing length will be uneven after thread trimming.

7-2-3. Arm thread guide R

The standard position of arm thread guide R (1) is when the screw (2) is aligned with the index mark. Loosen the screw (2) and move arm thread guide R (1) to adjust.

* When sewing heavy material, move arm thread guide R

(1) to the left. (The thread take-up amount will become greater.)

* When sewing light material, move arm thread guide R (1)

to the right. (The thread take-up amount will become less.)

More thread

Less thread

Index mark

5030

BAS-311G, BAS-326G

7. ADJUSTMENT

7-3. Adjusting the needle bar height

2552Q 4992Q

Turn the machine pulley to move the needle bar to the lowest position. Then remove the rubber plug (2), loosen the screw (3) and then move the needle bar up or down to adjust so that the second reference line from the bottom of the needle bar (reference line A) is aligned with the lower edge of the needle bar bush (1). * If using a DP X 5 needle, use the highest reference line (reference line a).

7-4. Adjusting the needle bar lift amount

2554Q 4993Q

Turn the machine pulley to raise the needle bar from the lowest position until the lowest reference line on the needle bar (reference line B) is aligned with the lower edge of the needle bar bush (1), and then loosen the bolt (2) and move the driver (3) so that the tip of the rotary hook is aligned with the center of the needle. * If using a DP X 5 needle, use the second reference line from the top of the needle bar (reference line b).

Needle center

Rotary hook tip

0135Q

7-5. Adjusting the driver needle guard

Turn the machine pulley to align the tip of the rotary hook with the center of the needle, and then loosen the set screw (2) and turn the eccentric shaft (3) to adjust so that the driver needle guard (1) is touching the needle.

NOTE:

Needle center

Rotary hook tip

2555Q

5227Q 0135Q

If it crosses the needle more than necessary, it will place a load on the needle, or it may cause poor thread tension. Furthermore, if it does not cross the needle at all, the tip of the rotary hook will interfere with the needle and skipped stitches may occur.

BAS-311G, BAS-326G

7. ADJUSTMENT

7-6. Adjusting the needle clearance

0138Q 4995Q

Turn the machine pulley to align the tip of the rotary hook with the center of the needle, and then loosen the set screw (1) and turn the eccentric shaft (2) to adjust so that the clearance between the needle and the rotary hook is 0.01 − 0.08 mm.

0.01 − 0.08mm

7-7. Adjusting the shuttle race thread guide

3574Q

Install the shuttle race thread guide (1) by pushing it in the direction of the arrow so that the needle groove is aligned with the center of the needle plate hole.

NOTE:

If the shuttle race thread guide is in the wrong position, thread breakages, soiled thread or tangling of the thread may occur. The position of the shuttle race thread guide is adjusted at the time of shipment from the factory. It should not be changed if possible.

7-8. Rotary hook lubrication amount

The optimum position is when the head of the set screw (1)

Less oil More oil

Aligned

4996Q

is aligned with the edge of the bed. The rotary hook lubrication amount can be adjusted within three turns to the right from that position.

• If the set screw (1) is turned clockwise, the lubrication amount becomes smaller.

• If the set screw (1) is turned counterclockwise, the lubrication amount becomes greater.

BAS-311G, BAS-326G

7. ADJUSTMENT

7-9. Adjusting the position of the movable knife

4950Q

Reverse position

5255Q

1. Open the top cover and tilt back the machine head.

2. Turn the pulley (1) by hand to lower the needle bar to its lowest position, and push the thread trimmer solenoid (2) as far as it will go.

3. With the collar (3) inserted into the groove of the thread trimmer cam (4), turn the pulley (1) by hand to set the driving lever (5) to the reverse position (when the thread take-up (6) is close to its lowest position).

5235Q

4. Loosen the bolt (7).

5. Move the thread trimming rod H (9) forward or back to adjust so that the distance from the ridge line on the right side of the needle plate to the ridge line on the movable knife (8) is 9.5 − 9.9 mm.

6. After tightening the bolt (7), check the above position once more.

5232Q 5234Q

5233Q

5236Q

BAS-311G, BAS-326G

Brother BAS-311G User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INSTRUCTIONS

CONTENTS

1. SPECIFICATIONS

2. FUNCTION SETTINGS

2-1. List of special functions when power is turned on

2-2. List of advanced functions

2-3. Memory switch setting method (Advanced)

2-4. List of memory switch settings

2-5. Setting the work clamp mode

2-6. Stitch counter checking method

2-7. Error history checking method

2-8. Input checking method

2-9. Output checking method

2-10. Software version checking method

3. READING / WRITING DATA

3-1. Handling data

3-2. Notes on handling CF cards (sold separately)

3-3. Structure of a CF card folder

3-4. Data read/write mode

3-5. Reading sewing data from CF cards

3-6. Writing sewing data to CF cards

3-7. Reading memory switch data from CF cards

3-8. Writing memory switch data to CF cards

3-9. Reading user program data from CF cards

3-10. Writing user program data to CF cards

3-11. Updating the control program

3-12. Writing error log data to CF card

3-13. Reading sewing data from floppy disks

3-14. Writing sewing data to floppy disks

3-15. Reading extended option output data from a CF card

3-16. Writing extended option output data to CF cards

3-17. Reading extended option output data from floppy disks

4. MECHANICAL DESCRIPTIONS

4-1. Needle bar and thread take-up mechanisms

4-2. Lower shaft and shuttle race mechanisms

4-3. Work clamp lifter mechanism (Solenoid specifications)

4-4. Work clamp lifter mechanism (Pneumatic specifications)

4-5. Intermittent presser foot lifter mechanism

4-6. Intermittent presser foot stroke mechanism

4-7. Feed mechanism

4-8. Thread trimmer mechanism

4-9. Tension release mechanism

4-10. Thread wiper mechanism

5. DISASSEMBLY

5-1. Covers

5-2. Thread wiper mechanism

5-3. Work clamp arm mechanism

5-4. Intermittent presser foot lifter mechanism (1)

5-5. Needle bar mechanism

5-6. Upper shaft mechanism

5-7. Lower shaft mechanism

5-8. Feed covers

5-9. Feed mechanism

5-10. Work clamp lifter mechanism (Solenoid specifications)

5-11. Work clamp lifter mechanism (Pneumatic specifications)

5-12. Tension release mechanism

5-13. Intermittent presser foot lifter mechanism (2)

5-14. Thread trimmer mechanism

5-15. Shuttle hook mechanism

6. ASSEMBLY

6-1. Thread trimmer mechanism (1)

6-2. Intermittent presser foot lifter mechanism (1)

6-3. Tension release mechanism

6-4. Work clamp lifter mechanism (Solenoid specifications)

6-5. Work clamp lifter mechanism (Pneumatic specifications)

6-6. Feed mechanism

6-7. Feed covers

6-8. Upper shaft mechanism

6-9. Needle bar mechanism

6-10. Intermittent presser foot lifter mechanism (2)

6-11. Lower shaft mechanism

6-12. Shuttle hook mechanism

6-13. Thread trimmer mechanism (2)

6-14. Work clamp arm mechanism

6-14-1. Adjustments after work clamp arm installation

6-15. Thread wiper mechanism