Brother BAS-611 Owner's Manual

INSTRUCTION MANUAL

LK3-B434E

Please read this manual before using the machine. Please keep this manual within easy reach for quick reference.

ELECTRONIC LOCKSTITCH PATTERN TACKER

Thank you very much for buying a BROTHER sewing machine. Before using your new machine, please read the safety instructions below and the explanations given in the instruction manual.

With industrial sewing machines, it is normal to carry out work while positioned directly in front of moving parts such as the needle and thread take-up lever, and consequently there is always a danger of injury that can be caused by these parts. Follow the instructions from training personnel and instructors regarding safe and correct operation before operating the machine so that you will know how to use it correctly.

SAFETY INSTRUCTIONS

1. Safety indications and their meanings

This instruction 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

Symbols

DANGER

CAUTION

................ This symbol ( ) indicates something that you should be careful of. The picture inside the triangle indi-

cates 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

of the thing that must be done. (For example, the symbol at left means “you must make the ground connection”.)

The instructions which follow this term indicate situations where failure to follow the instructions will almost certainly result in death or severe injury.

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.

must not do.

must do. The picture inside the circle indicates the nature

LK3-B434E Mark II

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 face plate 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 high-

frequency welders. 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 electrical 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 more than 49 kg. The installation should be carried out by two or more people.

Do not connect the power cord until installation is complete, otherwise the machine may operate if the foot switch is pressed by mistake, which could result in injury.

Hold the machine head with both hands when tilting it

back or returning it to its original position.

Furthmore, after tilting back the machine head, do not

push the face plate side or the pulley side from above, as this could cause the machine head to topple over, which may result in personal injury or damage to the machine.

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.

Avoid exposure to direct sunlight during use. Exposure to direct sunlight 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 belt 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, otherwise inflammation can result. Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and diarrhoea. Keep the oil out of the reach of children.

LK3-B434E Mark II

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.

Set the needle to the needle up stop position before turning off the power. If this is not done, the wiper may strike the needle, which might cause the needle to break.

Turn off the power switch at the following times, otherwise the machine may operate if the foot switch is pressed by mistake, which could result in injury.

• When threading the needle

• When replacing the needle and bobbin

• When not using the machine and when leaving the machine unattended

Cleaning

Set the needle to the needle up stop position before turning off the power. If this is not done, the wiper may strike the needle,

which might cause the needle to break. Turn off the power switch before carrying out cleaning,

otherwise the machine may operate if the foot switch is pressed by mistake, which could result in injury.

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, 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.

Set the needle to the needle up step position before turning off the power. If this is not done, the wiper may strike the needle, which might cause the needle to break.

Turn off the power switch and disconnect the power cord from the wall outlet at the following times, otherwise the machine may operate if the foot switch is pressed by mistake, which could result in injury.

• When carrying out inspection, adjustment and

maintenance

• When 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.

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

Hold the machine head with both hands when tilting it back or returning it to its original position. Furthermore, after tilting back the machine head, do not push the face plate side or the pulley side from above, as this could cause the machine head to topple over, which may result in personal injury or damage to the machine.

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.

LK3-B434E Mark II

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.

Hazardous voltage will cause injury.

Turn off main switch and wait 5 minutes before opening this cover.

Hochspannung verletzungsgefahr!

Bitte schalten sie den hauptschalter aus und warten sie 5 minuten, bevor sie diese abdeckung öffnen.

Un voltage non adapté provoque des blessures.

Eteindrel'interrupteur et attendre 5 minutes avantd' ouvrir le capot

Safety devices

Un voltaje inadecuado puede provocar las heridas.

Apagar el interruptor principal y esperar 5 minutos antes de abrir esta cubierta.

Eye guard Finger guard

Moving parts may cause injury.

Operate with safety devices. Turn off main switch before

Thread take-up cover Thread take-up solenoid cover Belt cover Motor cover, etc.

threading, changing bobbin and needle, cleaning etc.

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

Thread take-up solenoid cover

Eye guard

Finger guard

Motor cover

Thread take-up cover

Belt cover

LK3-B434E Mark II

1. NAME OF EACH PART ............................... 01

2. SPECIFICATIONS ......................................... 02

2-1. Specifications ....................................... 2

2-2. Examples of sewing patterns ............. 3

3. INSTALLATION............................................. 04

3-1. Power table ........................................... 4

3-2. Installing the motor ............................. 5

3-3. Installing the motor pulley .................. 5

3-4. Installing the control box .................... 6

3-5. Installing the rubber cushions ............ 7

3-6. Installing the oil pan ............................ 7

3-7. Installing the cushions......................... 7

3-8. Installing the machine head ............... 8

3-9. Installing the head rest ........................ 8

3-10. Installing the liquid cooling tank,

optional ................................................. 8

3-11. Installing the operation panel ............. 9

3-12. Connecting the ground wire ............... 9

3-13. Connecting the cords........................... 10

3-14. Piping (for pneumatic) ......................... 12

3-15. Installing the V-belt .............................. 14

3-16. Installing the belt cover ....................... 15

3-17. Installing the foot switch ..................... 15

3-18. Installing the motor cover ................... 16

3-19. Installing the spool stand .................... 16

3-20. Installing the needle sub plate ........... 17

3-21. Installing the eye guard ...................... 18

4. LUBRICATION ............................................... 19

4-1. Lubrication points ................................ 19

5. OPERATION .................................................. 20

5-1. Name and function of each

operation panel item ........................... 20

5-2. Operating procedure............................ 22

5-3. Operating the foot switch ................... 23

5-4.

Operating the emergency stop switch ...

6. CHECKING THE SEWING PATTERN ....... 25

7. CORRECT USE ......................................... 26

7-1. Selecting the needle and thread ........ 26

7-2. Installing the needle ............................ 26

7-3. Threading the upper thread ................ 26

7-4. Winding the lower thread ................... 27

7-5. Replacing the bobbin case and

threading the thread ............................ 28

7-6. Sewing conditions and thread

tension................................................... 28

8. SEWING ................................................... 31

9-2. Lubrication ............................................ 33

9-3. Draining the oil..................................... 34

9-4. Cleaning the control box air inlet

port ........................................................ 34

9-5. Cleaning the eye guard ....................... 34

9-6. Checking the needle ............................ 34

10.STANDARD ADJUSTMENTS ................. 35

10-1. Adjusting the needle bar height......... 35

Adjusting the needle bar lift amount .....

10-2.

10-3. Adjusting the driver needle guard ..... 36

10-4. Adjusting the needle clearance .......... 36

10-5. Adjusting the shuttle race thread

guide...................................................... 36

10-6.

Adjusting the thread take-up amount ....

10-7. Adjusting the movable knife ............... 37

10-8.

Adjusting the work clamp lift amount ...

10-9. Work clamp interchangeability ........... 41

10-10.

Adjusting the needle up stop position ...

10-11.Adjusting the thread wiper ................. 42

10-12.Checking the input sensor and

DIP switch input ................................... 43

10-13.Checking the input voltage ................. 44

10-14.Clearing all memory settings ............. 44

10-15.Moving stitch patterns......................... 45

10-16.Adjustment of air pressure

(for pneumatic) ..................................... 46

10-17.

Adjustment of inner clamping device ....

11.USING THE COUNTERS ......................... 47

11-1. Using the bobbin thread counter ....... 47

11-2. Using the production counter ............ 47

12.CHANGING FUNCTIONS USING

THE DIP SWITCHES ................................ 48

12-1. Operation panel DIP switches ............ 48

12-2. DIP switches inside the control

box ......................................................... 49

12-3. Using user programs ........................... 50

13.CHANGING SPECIAL FUNCTIONS

USING THE MEMORY SWITCHES ........ 52

13-1. Using the cycle sewing function ........ 55

14.SETTING THE WORK CLAMP MODE .... 57

14-1. Setting solenoid work clamp mode ... 57

Setting pneumatic work clamp mode ....

14-2.

14-3. Light work clamp ................................. 58

14-4. Setting reverse work clamp mode ..... 59

15.TABLE OF ERROR CODES ...................... 60

16.GAUGE PARTS LIST ACCORDING

TO SUBCLASSES .................................... 62

9. MAINTENANCE AND INSPECTION ....... 32

9-1. Cleaning the rotary hook .................... 32

LK3-B434E Mark II

17.TROUBLESHOOTING ................................. 65

18.OPTIONAL PARTS ....................................... 68

1. NAME OF EACH PART

i !5

[LK3-B434E Mark II/Solenoid specifications]

u !1

Specifications with inner clamping device

!4 !0

[LK3-B434E Mark II/Pneumatic specifications]

Safety devices;

q Power switch !2 Finger guard w Control box !3 Eye guard e Operation panel !4 Thread take-up cover r Foot switch !5 Belt cover t Motor !6 Motor cover y Tension release lever !7 Thread take-up solenoid cover u EMERGENCY STOP switch i Pulley o Spool stand !0 Thread take-up lever !1 Wiper solenoid cover

LK3-B434E Mark II

2. SPECIFICATIONS

2-1. Specifications

2. SPECIFICATIONS

BROTHER INDUSTRIES, LTD.

LK3-B434EX-3

MADE IN JAPAN

Stitch formation

Maximum sewing speed

Maximum pattern size

Feed mechanism

Stitch length

Number of stitches

Maximum stitch number

Work clamp lifter

Work clamp height

Rotary hook

Wiper device

Medium materials

Heavy materials

Single needle lock stitch

2,500 rpm (Pitch 3 mm)

100 × 60 mm max.

R-θ intermittent feed mechanism (pulse-motor driven mechanism)

0.1 - 10.0 mm

Variable

20,000 stitches (including 10,000 stitches which can be added)

Solenoid type or pneumatic type

17 mm max. (for solenoid), 25 mm max. (for pneumatic)

(Max. 17 mm for inner clamping device)

Shuttle hook (shuttle hook 2, optional)

Standard equipment

Thread trimmer device

Thread take-up device

Safety device

Standard equipment

built-in stopping mechanism

Data storage method P-ROM (Any sewing pattern can be added using BAS-PC/300.) Number of user

programs Number of cycle

programs Number of stored

data Motor

Weights

Up to 100 patterns can be added. Total number of stitches of stored data

which can be added is within 10,000.

Three-phase 400W induction motor

Machine head: 49 kg, Operation panel: 0.6 kg,

Control box: 9 - 19 kg (depending on destination)

Single-phase 220 - 230V

Power source

3-phase 220, 380, 400, 415V

Maximum electric power consumption; 600VA

[Main use] Patterns up to a maximum size of 100 mm × 60 mm can be sewn.

For plain stitching of small articles, curtain darts, etc.

Two-stage work clamp, light work clamp and inner clamping device can be used (for pneumatic).

For attaching items, sewing labels, etc.

If you want to sew a pattern, you can create your original pattern using the BAS-PC/300. Consult with your local Brother Sales Office for details.

LK3-B434E Mark II

2. SPECIFICATIONS

2-2. Examples of sewing patterns

The following are examples of possible patterns with the LK3-B434E Mark II.

Sewing patterns

Uses Number of stitches

Sewing patterns

Uses Number of stitches

Sewing patterns

Decorative tacking

Cross tacking

Triangular chain tacking

Open cross tacking

Rectangular decorative tacking

Buckle stitching

Uses Number of stitches

Sewing patterns

Uses Number of stitches

Square tacking

Heart-shaped tacking

Bullet-nose tacking

Half-moon tacking

LK3-B434E Mark II

Round tacking

L-shaped tacking

3. INSTALLATION

Table/ legs assembly

Model code

127-V30-00001

3. INSTALLATION

CAUTION

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 head weighs more than 49 kg. The installation should be carried out by two or more people.

Do not connect the power cord until installation is complete, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury.

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

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

Install the belt covers to the machine head and motor.

3-1. Power table

• Use the power table which has been specially designed for each sewing machines.

* If using a commercially-available table, process it as

shown in the illustration below.

NOTE:

The thickness of the table should be at least 40 mm, and it should be strong enough to bear the weight and vibration of the sewing machine. If the distance A between the insides of the legs is less than 740 mm, move the control box installation position closer to the motor (B = 247 mm). Check that the control box is at least 10 mm away from the leg. If the control box and leg are touching, it could cause the sewing machine to operate incorrectly.

Control Box

Motor

Operation panel cord hole

Section A-A

LK3-B434E Mark II

Counterbore depth 23

depth 5

3. INSTALLATION

3-2. Installing the motor

w e

Install the motor u to the work table with the four accessory bolts q, cushions w, cushion collars e, flat washers r, spring washers t and nuts y. At that time, fix by setting bolts q a little to the right of oval hole on motor.

NOTE:

Tighten the nuts y so that the clearance between the table and the cushion collars e is approximately 1 mm.

1 mm

3-3. Installing the motor pulley

r t

Table

Place the motor pulley q onto the shaft of the motor w so that the key groove is aligned, and then tighten

the set screw e so that the center of the V groove in the motor pulley q is aligned as closely as possible with the center of the belt hole in the power table.

LK3-B434E Mark II

3-4. Installing the control box

3. INSTALLATION

t y

u i o

3 mm

Table

Cushions

Cushion collars

Rubber collers

Flat washers

Nuts

1. Remove the 12 screws q, and then open the covers (panel mounting assembly w and main P.C. board

mounting plate e).

NOTE:

When opening the cover, hold it securely so that it does not fall down.

2. Install the control box with the four accessory bolts r, cushions t, cushion collars y, rubber collars u,

flat washers i and nuts o as shown in the illustration above. At this time, leave a gap of approximately 3 mm between the work table and the top of the box. * Use two nuts o at each installation location, and make sure that both nuts are tightened.

3. Close the covers (panel mounting assembly w and main P.C. board mounting plate e), and tighten them

with the screws q. * The main P.C. board mounting plate e will be opened again during “3-13. Connecting the cords”, so

provisionally tighten it with the screw q.

4. Install the power switch !0 with the two screws !1.

5. Secure the power switch cord with the three staples !2.

6. Pass the motor cord through the cord hole !3.

LK3-B434E Mark II

3. INSTALLATION

3-5. Installing the rubber cushions

3-6. Installing the oil pan

Install the rubber cushions q with the nails w.

1. Insert the tabs of the oil pan w into the holes for the cushions q, and then secure it in place with the five nails e so that the oil pan w is not at an angle.

2. While pushing the oil pan w down from above, screw in the oil container r.

3-7. Installing the cushions

Place the two cushions q into the holes in the work table so that the notches are aligned with the tabs in the oil pan, and secure them in place with the nails w.

LK3-B434E Mark II

3-8. Installing the machine head

3. INSTALLATION

1. Insert the head hinges q into the machine head so that they are parallel, and then secure them with the two set screws w.

2. Place the machine head gently on top of the rubber cushions e and cushions r.

NOTE:

Pull the cords t out as shown in the illustration above in order to prevent them from being clamped by the machine head.

3. Install the hinge presser y with the two screws u.

3-9. Installing the head rest

Tap the head rest q into the table hole.

NOTE:

Tap the head rest securely into the table hole.

3-10. Installing the liquid cooling tank, optional

LK3-B434E Mark II

1. Remove the rubber plug, and then push the liquid cooling tank q.

2. Tighten it with the set screw w.

3. INSTALLATION

3-11. Installing the operation panel

The operation panel can be installed to either the top or bottom of the work table.

Top of work table

1. Install the rear frame q to the work table (top or bottom) with the four wood screws w.

2. Install the front frame e to the rear frame q with the four screws r. * The vertical orientation of the front frame e is the same whether it is installed to the top or the bottom of

the work table.

3. Insert the connector cord t into the control box through the hole at the side of the box. Refer to “3-13.

Connecting the cords” for details on connecting the cord.

4. Secure the connector cord t with the staples (in three places).

Table

Bottom of work table

Table

3-12. Connecting the ground wire

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

Red White Black Yellow/Green

CAUTION

Connect to the power switch. However, the black wire is insulated to the inside of the box and is not used.

Connect to ground

LK3-B434E Mark II

3-13. Connecting the cords

P18

3. INSTALLATION

P14

P11

1. Gently tilt back the machine head.

NOTE:

After tilting back the machine head, do not push the face side or the pulley side from above.

2. Pass the cords q through the hole w in the work table.

3. Gently return the machine head to its original position.

4. Remove the six screws e, and then open the control box cover (main P.C. board mounting plate r).

NOTE:

When opening the cover, hold it securely so that it does not fall down.

5. Loosen the two screws t, and then open the cord presser plate y in the direction of the white arrow and

pass the cords q through the opening.

6. Loosen the screw o, and then attach the ground cord u for the machine head and the ground cord i for

the operation panel as shown in the illustration.

7. Loosen the screw !1, and then attach the ground cord !0 for the upper shaft motor as shown in the illustra-

tion.

8. Securely connect connectors P1 to P8, P11, P14 (for pneumatic) and P18 as indicated in the table.

Machine head connectors

Connection location on circuit board

Connection location

No. of pins

Cord mark X, Y, Sewing sensor Synchronizer Machine specification

select connector Thread wiper solenoid*

Thread take-up solenoid Presser solenoid

Thread trimmer solenoid Pulse motor, Y

Pulse motor, X Operation panel Upper shaft motor EMERGENCY STOP switch Solenoid valve (for pneumatic)

12-pin

5-pin

8-pin

5-pin

4-pin

4-pin (blue)

4-pin

26-pin

3-pin 6-pin

12-pin

None None

⁄8

None

P1 (ORG2) P2 (SYNCHRO)

P3 (SELECT)

P4 (SOL2)

P5 (SOL)

P6 (YPM) P7 (XPM) P8 (PANEL) P11 (UVW) P18 (HEAD) P14 (AIR)

* Provided as an option for solenoid specifications.

9. Secure the cords q with the cord clamps !2 and !3.

10. Close the cord presser plate y in the direction of the black arrow, and secure it by tightening the screws t.

NOTE:

Check that the cords do not get pulled when the machine head is tilted back gently.

LK3-B434E Mark II

3. INSTALLATION

90˚

RESET

11. Replace PROM control assembly with one which contains sewing data.

1) Use the special tool to remove the PROM control assembly !4 from the PROM socket !5. * Store the removed PROM control assembly in the special case provided.

2) Bend the pins of the PROM control assembly which contains sewing data !6 so that they are at an angle of approximately 90˚.

3) Make the directions of the PROM control assembly !6 and the PROM socket !5 same so that the portions (a) come on the same side, and press the PROM gently into the socket while checking that the pins of the PROM are going into the socket properly.

NOTE:

• If the PROM has been replaced, press the RESET switch !7 while turning on the power in order to initialize the memory. All of the user programs, cycle programs and memory switches which have been recorded will then be cleared.

• The PROM which is installed at the time of shipment from the factory does not include any sewing data. If you try to change the program number without replacing the PROM, error “E-b1” will be displayed. To create sewing data, use the BAS-PC/300 electronic pattern sewer/reader (sold separately).

12. Tighten the cover (main P.C. board mounting plate r) with the six screws e.

LK3-B434E Mark II

3-14. Piping (for pneumatic)

Cylinder L

Cylinder R

Reversal cylinder

Upper knob

Lower knob

Switch

3. INSTALLATION

Pneumatic work clamp

Reverse work clamp

Connect air tubes in accordance with the identified numbers in the figure. At this time, pass the air tubes through the hole q and then pass it through the work table hole. * After connecting the air tubes, bind them together with the fastening band. * Light work clamp mode can be used by changing over the air tube connections.

(Refer to “14. Setting the work clamp mode”.)

LK3-B434E Mark II

3. INSTALLATION

3-14-1. Installing the air unit

Make sure that the air unit does not touch the control box or the work table leg.

50 mm

120 mm

■ When installing to the underside of the work table

1. Remove the two screws q and the valve setting plate w.

2. Turn the valve setting plate w upside down, and install it to the underside of the work table using the two wood screws e and washers r which are provided as accessories.

3. Install the air unit t to the valve setting plate w with two screws q.

4. Connect the air hose y.

5. Adjust the air pressure. (Refer to “10-16. Adjusting the air pressure”.)

■ When installing to a beam

1. Make holes in the beam as shown in the illustration above. (Button hole diameter is 5.4 mm.)

Pneumatic work clamp ...... Pitch 50 mm Reverse work clamp ...... Pitch 120 mm

2. Install the air unit u to the beam with two accessory screws i and two bolts o.

3. Connect the air hose !0.

4. Adjust the air pressure. (Refer to “10-16. Adjusting the air pressure”.)

3-14-2. Adjusting the speed controller

The speeds at which the work clamps are raised and lowered can be adjusted by loosening or tightening the valve control knobs. The speeds should be adjusted to speeds which are suitable for the intended application.

• If the upper control knob is tightened, the raising speed becomes slower; if it is loosened, the raising speed

becomes faster.

• If the lower control knob is tightened, the lowering speed becomes slower; if it is loosened, the lowering

speed becomes faster.

• When the power is turned off, the work clamps can be operated by pressing the switch.

NOTE:

Pneumatic specifications

Adjust the control knobs so that the left and right work clamps both operate at the same speed.

Specifications with inner clamping device

First, adjust the speed for the reverse work clamp. (Valve 1) Next, turn on the power and then adjust the speed of the left work clamp. (Valve 2) Adjust the control knobs so that the lowering speed of the left work clamp becomes faster than that of the reverse work clamp and the raising speed of it becomes slower than that of the reverse work clamp. Next, adjust the control knobs so that the reverse work clamp operates more quickly. (Valve 3)

LK3-B434E Mark II

3-15. Installing the V-belt

Approx. 1 mm

Approx. 9 - 10 mm 10N

3. INSTALLATION

1. Gently tilt back the machine head, and then place the V-belt q into the V grooves on the machine head pulley w and the motor pulley e.

NOTE:

After tilting back the machine head, do not push the face plate side or the pulley side from above.

2. Gently return the machine head to its original position. * Be careful not to clamp the cords at this time.

3. Provisionally install the accessory tension pulley assembly r with the accessory flat washer, spring washer and bolt.

4. Adjust the belt tension by moving the tension pulley assembly to the right and left so that there is 9 - 10 mm of deflection in the V-belt q when it is gently pushed in the middle with a force of approximately 10 N. After adjusting, tighten the bolt A to secure the left pulley assembly.

5. Move the right tension pulley so that there is a gap of about 1 mm between it and the V-belt q, and then tighten the bolt B to secure the right pulley assembly.

NOTE:

Use brother specified V-belt (belt, VM). The V-belt q may stretch slightly when it is first used, so adjust the belt tension after about 3,000 cycles of use. When above belt tension is week, this will be cause of following problems;

• Noise & vibration become large.

• Needle up stop position becomes unstable.

• Error message [E-50] is displayed.

Check that the motor is positioned so that the Vbelt is straight. (Fig.1)

V-belt

Motor

Sewing machine

Fig.1

LK3-B434E Mark II

3. INSTALLATION

3-16. Installing the belt cover

1. Loosen the two screws w of the upper cover q and the two screws r of bed cover Le.

2. Insert the belt cover t in the direction of the arrow, and then secure it with the two screws w, the two screws r and the screw y. * When tilting back the machine head, loosen the screws w and r, remove the screw y and then remove

the belt cover t first.

3. Attach the rubber plug u to the belt cover.

3-17. Installing the foot switch

[A]

u i

!0 o

!4!9!5

[B]

1. Insert the connector of the foot switch e into the connector w of the control box q.

2. Install the foot switch e to the work table leg !2 with foot switch support plate A r, foot switch support plate C t, the bolt y, spring washer u, flat washer i, bolt o, spring washer !0 and flat washer !1 as shown in Figure A.

♦If foot switch support plate B !3 is used in a back-to-front position, it can be used as shown in Figure. B.

1. Remove the screw !4 and rubber plug !5. * Note that the spring !6 will come out when the screw !4 is removed.

2. Turn foot switch support plate B !3 back to front, and then install it with the bolt !7, spring washer !8 and flat washer !9 as shown in Figure. B.

NOTE:

If using the foot switch without installing it to the work table leg, move the foot switch at least 10 mm away from the leg. If the foot switch is not fully in contact with the work table leg when the foot switch is used, for example, if it is just hooked loosely onto the work table leg, it may cause the sewing machine to operate incorrectly. If using the two-pedal foot switch as an option for solenoid specifications, change the setting of DIP switch A on the operation panel while referring to “Setting the work clamp mode” on page 57.

LK3-B434E Mark II

3-18. Installing the motor cover

3. INSTALLATION

1. Install the motor cover q to the motor back cover w with the screws e and the flat washers r.

2. Pass the motor shaft through the notch in the motor back cover w, and then tighten the screws y and the washers u so that the clearance between the motor pulley t and the motor cover q is uniform.

3-19. Installing the spool stand

Assemble the spool stand q while referring to the spool stand instruction manual, and then install the spool stand q at the right side of the work table.

LK3-B434E Mark II

3. INSTALLATION

3-20. Installing the needle sub plate

1. Install the four needle sub plate supports q with the four screws w.

2. Insert the needle sub plate e from the front of the machine so that it is level.

NOTE:

Insert the needle sub plate e so that the X feed lever cap r sits on top of the needle sub plate e.

3. Install the needle sub plate e with the four screws t.

4. Loosen the screws w and make fine adjustments to the height of the needle sub plate e so that it is at the same height as the needle plate y.

5. Provisionally secure the two auxiliary plate supports u with the washers i and the screws o and !0, and then firmly tighten the screws o and !0 in that order.

i !0

LK3-B434E Mark II

3-21. Installing the eye guard

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

3. INSTALLATION

CAUTION

Install the eye guard assy w to the face plate q with the two screws e.

LK3-B434E Mark II

4. LUBRICATION

CAUTION

Turn off the power switch before starting lubricating, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury.

NOTE 1: Fill the machine with oil when the oil level is down to about one-third full in the oil sight glass.

If oil is not added and the oil drops below this level, there is the danger that the machine may seize during

NOTE 2: Be sure to let the machine operate for a while after adding the oil. NOTE 3: If there is no more oil on the felt of the shuttle race base, problems with sewing may result, so add oil to the felt

NOTE 4: Use only specified Brother oil (Nisseki Sewing Libe 10) for the machine oil.

4-1. Lubrication points

operation.

until it is slightly soaked.

1. Fill the arm-side oil tank with oil. * When setting up the sewing machine and when

it hasn’t been used for an extended period of time, be sure to add 2-3 drops of oil at the place indicated by the arrow.

3. Add oil to the felt q of the shuttle race base. * When setting up the sewing machine and when

it hasn’t been used for an extended period of time, be sure to add 2-3 drops oil to the felt.

2. Fill the bed-side oil tank with oil

4. If using the liquid cooling tank w, fill it with silicon oil (100 mm2/s).

LK3-B434E Mark II

5. OPERATION

5-1. Name and function of each operation panel item

B430E Series

POWER

PROGRAM NO.

X-SCALE

5. OPERATION

P1 P2

RESET

Y-SCALE

P4P3

SPEED

TEST

BOBBIN.WIND

q POWER indicator .................. Illuminates when the power switch has been turned on.

w RESET switch........................ Press this switch to reset the machine when an error occurs.

e TEST switch .......................... Use this switch when you want to operate only the feed mechanism in order

COUNTER

SELECT

to check a pattern.

r TEST indicator ...................... Illuminates when the TEST switch has been pressed.

t BOBBIN. WIND switch ......... Press this switch to wind the lower thread.

y SELECT switch ...................... Use this switch to select a menu (program number, X and Y feed, speed and

counter). Each time the switch is pressed, one of the menu indicators (u to !1) illuminates, and the setting for that menu item appears in the display !4.

The illiminated indicator changes as follows each time the switch is pressed.

PROGRAM NO. indicator u →X-SCALE indicator i →Y-SCALE indicator o →SPEED indicator !0 →COUNTER indicator !1

u PROGRAM NO. indicator ..... Illuminates when the SELECT switch y is pressed to shown the program

number setting.

LK3-B434E Mark II

5. OPERATION

POWER

B430E Series

PROGRAM NO.

X-SCALE

P1 P2

P4P3

RESET

Y-SCALE

SPEED

TEST

BOBBIN.WIND

i X-SCALE indicator ................ Illuminates when the SELECT switch y is pressed to shown the X-scale set-

o Y-SCALE indicator ................ Illuminates when the SELECT switch y is pressed to shown the Y-scale set-

!0 SPEED indicator ................... Illuminates when the SELECT switch y is pressed to shown the speed set-

COUNTER

SELECT

ting.

!1 COUNTER indicator ............. Illuminates when the SELECT switch y is pressed to show the bobbin thread

or production counter setting.

!2 DISPLAY SET switches ........ Used to change the menu details which are displayed in the window !4.

!3 User program switches ....... Used to set and select user programs.

!4 Display window .................... This display window will indicate the current statu for the selected menu,

error or memory switch.

LK3-B434E Mark II

5-2. Operating procedure

5. OPERATION

Preparation

Turn on the power switch. (The POWER indicator q will illuminate and the program number will flash in the display window !4.)

Program No.

X-scale (%) Y-scale (%)

Speed (rpm)

Factory default

0 * 100 100

2000

Variable range

100 - *

20 - 200 20 - 200

1,000 - 2,500

*1 For checking the origin points for X and Y feed *2 Custom-made program

5-2-1. Setting the program number

Press the SELECT switch y

123

until the PROGRAM NO. indicator illuminates.

PROGRAM NO.

X-SCALE

Y-SCALE

SPEED

COUNTER

SELECT

Press the DISPLAY SET switches !2 until the desired program number is flashing in the display window.

Depress the foot switch to the second step.

NOTE: For two-pedal foot switch,

depress the work clamp switch to lower the work clamp, before depressing the start switch.

* The display will stop flashing

and illuminates steadily, and the feed mechanism will move to the sewing start position.

1st step

2nd step

This completes the setting of the program number.

5-2-2. Setting the X-scale and Y-scale

Press the SELECT switch y

123

until the X-scale or Y-scale indicator illuminates.

PROGRAM NO.

X-SCALE

Y-SCALE

SPEED

COUNTER

SELECT

Press the DISPLAY SET switches !2 until the desired scale setting is flashing in the display window.

(The setting is displayed as a percentage.)

Depress the foot switch to the second step.

NOTE: For two-pedal foot switch,

depress the work clamp switch to lower the work clamp, before depressing the start switch.

* The display will stop flashing

and illuminates steadily, and the feed mechanism will move to the sewing start position.

1st step

2nd step

This completes the setting of the X-scale or Y-scale.

5-2-3. Setting the sewing speed

Press the SELECT switch y

until the SPEED indicator illuminates.

Press the DISPLAY SET switches !2 until the desired speed setting is flashing in the display window.

PROGRAM NO.

X-SCALE

Y-SCALE

SPEED

COUNTER

SELECT

NOTE:

* Be sure to check the sewing pat-

tern (refer to page 25) after setting has been completed to make sure that the needle hole does not go out of the area circumscribed by the work clamp.

* The needle racking width for

backtack stitches (with stitch widths of 1 mm or less) is not enlarged or reduced. If this results in problems, set memo-0d to “ON”.

LK3-B434E Mark II

5. OPERATION

5-3. Operating the foot switch

1st step

2nd step

■ Single-pedal foot switch (two steps)

When the foot switch is depressed to step 1, the work clamp is lowered, and when it is depressed to step 2, sewing starts.

■ Two-pedal foot switch (one step + one step)

When the work clamp switch (left side) is depressed, the work clamp is lowered, and when the start switch (right side) is depressed, sewing starts.

1st step

2nd step

Start switch

Work clamp switch

Start switch

■ Two-pedal foot switch (two steps + one step)

* For pneumatic

When the work clamp switch (left side) is depressed to step 1, the work clamp on one side is lowered, and when it is pressed to step 2, the work clamps on both sides are lowered. * The work clamp lowering pattern can be set to a

variety of different patterns. (Refer to “14. SETTING THE WORK CLAMP MODE”. When the start switch (right side) is depressed, sewing starts.

LK3-B434E Mark II

5. OPERATION

5-4. Operating the emergency stop switch

If the emergency stop switch is pressed while normal sewing or test sewing is being carried out, the sewing machine will immediately stop operating.

Canceling an emergency stop

1. Turn the emergency stop switch q clockwise and

then pull it out to release the lock.

2. Press the RESET switch w on the control panel. * The electronic alarm will stop sounding.

3. If not joining a new thread, press the RESET switch w once more so that the display panel flashes. Turn the pulley by hand to set the needle to the needle up stop position, and then continue with sewing.

RESET

BOBBIN.WIND

TEST

Continuing sewing from a stopping point

If the emergency stop switch was pressed because a thread breakage occurred or the lower thread ran out, sewing can be resumed from the point where the thread ended.

1. Turn the emergency stop switch q clockwise and then pull it out to release the lock.

2. Press the RESET switch w on the control panel. * The electronic alarm will stop sounding.

3. Press the BOBBIN. WIND switch e to trim the thread.

4. Press the BOBBIN. WIND switch e once more. * The work clamp will move backward one stitch

at a time while this switch is being pressed. If the work clamp moves back too far, press the TEST switch r to move the work clamp forward. Press the TEST switch r once more when you would like the work clamp to stop.

5. Once the work clamp has returned to the desired position, depress the foot switch. The sewing machine will then resume sewing.

LK3-B434E Mark II

6. CHECKING THE SEWING PATTERN

■ When checking by operating only the feed mechanism

1. Turn on the power switch.

(The POWER indicator will illuminate and the program number will flash in the display window.)

2. Press the TEST switch.

(The TEST indicator will illuminate.)

3. Depress the foot switch to the second step.

* For two-pedal foot switch, lower the work clamp before depressing the start switch (right

side). (The feed mechanism will move to the sewing start position and the program number will stop flashing.)

* This operation is only carried out the first time that a program has been selected or the size

ratio has been changed.

TEST

1st step

2nd step

4. Depress the foot switch to the second step. Only the feed mechanism will move.

[Check that the needle hole q does not protrude past the frame of the work clamp w.] * If you depress the foot switch again and keep it depresses after the feed mechanism has started to

move, the feeding speed will increase.

* If you would like to stop the feed while it is moving, press the TEST switch.

5. Press the TEST switch.

(The TEST indicator will switch off and the test mode will be cleared.)

6. Depress the foot switch.

The work clamp will rise and the preparation for sewing will be completed.

To ensure safety during use ......

You can prevent accidental changes being made to programs by setting DIP switches 7 and 8 to ON. When DIP switch 7 is ON

... The sewing pattern cannot be enlarged.

When DIP switch 8 is ON

... The program number cannot be changed.

1st step

2nd step

TEST

LK3-B434E Mark II

7. CORRECT USE

7-1. Selecting the needle and thread

Different needles and threads are used for different sewing applications. Refer to the table at right for details on which needle and thread to select.

NOTE:

For inner clamping device, use only the DP × 17 needle.

7-2. Installing the needle

7-3. Threading the upper thread

Needle

DP × 5 #14

DP × 17NY #19

Thread #80 - #50 #50 - #20

Main application

Medium materials

Heavy materials

CAUTION

Turn off the power switch before installing the needle, otherwise the machine may operate of the foot switch is depressed by mistake and serious injury could result.

Loosen the set screw q, insert the needle w as far as it will go so that the groove is facing toward you, and then tighten the set screw q.

CAUTION

Turn off the power switch before threading the thread, otherwise the machine may operate if the foot switch is depressed by mistake and serious injury could result.

Thread the upper thread correctly as shown in the illustration below. * If the tension release lever q is raised in the direction of the arrow, it will be easier to open the tension disc

w and pull the thread through.

[Two holes] Spun rayon yarn

Synthetic thread

[When using the liquid cooling tank]

[One hole]

Approx. 40 mm

LK3-B434E Mark II

7. CORRECT USE

7-4. Winding the lower thread

CAUTION

Do not touch or place anything against any of the moving parts while winding the lower thread, otherwise personal injury or damage to the machine may result.

1. Place the bobbin all the way onto the shaft.

2. Thread the thread as shown in the illustration at right, wind the thread around the bobbin several times in the direction of the arrow, and then press the bobbin presser q.

3. Turn on the power switch. (The POWER indicator on the operation panel will illuminate.)

4. Check that the needle is not touching the presser foot, and then while pressing the BOBBIN. WIND switch w, depress the foot switch e to start the machine. Keep depressing the foot switch e until the lower thread stops being wound onto the bobbin.

Release the BOBBIN. WIND switch w after the machine starts operating. If you release the foot switch before winding is completed, depress it once more while pressing and holding the BOBBIN. WIND switch w.

5. The bobbin presser q will automatically return to its original position after a set amount of thread (80 90% of the bobbin capacity) has been wound on.

6. Release the foot switch e.

7. Remove the bobbin, hook the thread onto the knife r, and then pull the bobbin in the direction of the arrow to cut the thread.

BOBBIN.WIND

8. To wind more thread onto the bobbin, loosen the set screw t and pull the bobbin presser q outward.

<<If the thread winds onto the bobbin unevenly>> If the thread winds onto the bobbin unevenly, loosen the nut q and turn the bobbin winder thead tension stud w to adjust. * If the thread winds on as shown in A, turn the bob-

bin winder thread tension stud w clokwise; if it winds on as shown in B, turn the bobbin winder thead tension stud w counterclockwise.

LK3-B434E Mark II

Case A

Case B

7-5. Replacing the bobbin case and threading the thread

CAUTION

Turn off the power switch before removing and replacing the bobbin case, otherwise the machine may operate if the foot switch is depressed by mistake and serious injury could result.

7. CORRECT USE

Pull the shuttle race cover q toward you to open it.

Insert a new bobbin into the bobbin case, and then pass the thread through the slot w and pull it out from the thread hole e. Check that the bobbin turns in the direction of the arrow when the thread is pulled at this time.

7-6. Sewing conditions and thread tension

Medium materials

Use

Standard hook

Large hook

Pass the thread through the lever thread hole r, and then pull out approximately 30 mm of thread.

Heavy materials

Standard hook

30 mm

Large hook

Upper thread

Lower thread

Upper thread tension (N)

Lower thread tension (N)

Thread take-up spring height (mm)

Thread take-up spring tension (N)

Pre-tension (N)

Needle

The sewing conditions given in the above table may need to be changed depending on the article being sewn.

#50 or

equivalent

#60 or

equivalent

0.6 - 0.9

0.2 - 0.3

6 - 8

0.15 - 0.35

0.1 - 0.3

DP × 5 #14

← ←

1.0 - 1.3

← ← ← ← ←←

#30 or

equivalent

#50 or

equivalent

1.2 - 1.6

0.2 - 0.3

6 - 8

0.4 - 0.6

0.3 - 0.5

DP × 17NY #19

←

1.4 - 1.8

← ← ← ←

LK3-B434E Mark II

7. CORRECT USE

7-6-1. Guide to maximum sewing speed

Use

8 layers of denim

Max. sewing speed (rpm)

2,500

NOTE:

The thread may break due to heat under some sewing conditions. If this happens, reduce the sewing speed, or use the liquid cooling tank (option).

12 layers of denim

Ordinary materials

Use

8 layers of denim

Ordinary materials

7-6-2. Lower thread tension

weaker stronger

2,300

2,500

Max. sewing speed (rpm)

2,500

Adjust the thread tension to the weakest possible tension by turning the thread tension nut q until the bobbin case will not drop by its own weight while the thread end coming out of the bobbin case is held.

7-6-3. Upper thread tension

Weaker

Stronger

Turn the tension nut q (main tension) to adjust the tension as appropriate for the material being sewn. Furthermore, turn the thread nut w (sub-tension) to adjust the remaining length of upper thread to 35 - 40 mm, when the thread take-up lever is not used.

LK3-B434E Mark II

7-6-4. Thread take-up spring height 7-6-5. Thread take-up spring tension

Lower Higher

7. CORRECT USE

Loosen the set screw q and turn the tensioner body to adjust the thread take-up spring height.

7-6-6. Adjusting arm thread guide R

Become greater

Become less

Stronger

Weaker

Turnthetensionstudqwithascrewdriver.

The standard position of arm thread guide Rq is the position where the screw w is in the center of the adjustable range for arm thread guide Rq. To adjust the position, loosen the screw w and then move arm thread guide Rq. * When sewing thick material, move arm thread guide

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

* When sewing thin material, move arm thread guide

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

7-6-7. Thread take-up amount

Become less

Become greater

Loosen the screw q and move the stopper (3.57 nut) w to adjust the operating angle of the thread take-up

solenoid e. * To reduce the thread take-up amount, move the

stopper w upward.

* To increase the thread take-up amount, move the

stopper w downward.

LK3-B434E Mark II

8. SEWING

CAUTION

Turn off the power switch at the following times, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury.

• Threading

• When replacing the needle

• When not using the machine and when leaving the machine unattended. 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.

Before starting sewing ......

• Check that the needle bar is at its highest position. Turn the machine pulley so that the index mark q on the pulley is between the marks w on the belt cover.

* If the machine pulley stop position is incorrect,

error “E-50” may be displayed, or the wiper may come into contact with the needle and break the tip of the needle.

1. Turn on the power switch. (The POWER indicator will illuminate and the program number will flash in the display.)

2. Depress the foot switch to the 2nd step. * For two-pedal foot switch, depress the start

switch (right side). The feed mechanism will move to the starting position and the work clamp will rise. * Note that if the foot switch is pressed to the

2nd step while the display is illuminated, the machine will start operating.

3. Place the material to be sewn under the work clamp e, and then depress the foot switch.

When the foot switch is pressed to the 1st step, the work clamp e will lower. If you would like to shift the position of the material, release the foot switch. The work clamp e will then rise again. When the foot switch is pressed to the 2nd step, the machine will start operating. * Fot two-pedal foot switch, depress the work

clamp switch (left side) to lower the work clamp before depressing the start switch (right side) in order to start the machine.

1st Step 2nd Step

4. Once sewing is completed and the thread has been trimmed, feed will move automatically to the next starting point and the work clamp e will rise.

LK3-B434E Mark II

9. MAINTENANCE AND INSPECTION

CAUTION

Turn off the power switch before carrying out cleaning, otherwise the machine may operate if the foot switch is pressed by mistake, which could result in injury.

9-1. Cleaning the rotary hook

1. Pull the shuttle race cover toward you to open it, and then remove the bobbin case.

9. MAINTENANCE AND INSPECTION

2. Open the setting claw q in the direction indicated by the arrow, and then remove the shuttle race body w and the shuttle hook e.

3. Clean all the dust and thread ends from around the driver r, the top of the rotary hook thread guide and the shuttle race.

LK3-B434E Mark II

9. MAINTENANCE AND INSPECTION

9-2. Lubrication

NOTE1: Fill the machine with oil when the oil level is down to about one-third full in the oil sight glass.

NOTE2: Be sure to let the machine operate for a while after adding the oil. NOTE3: If there is no more oil on the felt of the shuttle race base, problems with sewing may result, so add oil to the felt

NOTE4: Use only specified Brother oil (Nisseki Sewing Libe 10) for the machine oil.

If oil is not added and the oil drops below this level, there is the danger that the machine may seize during operation.

until it is slightly soaked.

1. Fill the arm-side oil tank with oil. * When setting up the sewing machine and when

it hasn’t been used for an extended period of time, be sure to add 2-3 drops of oil at the place indicated by the arrow.

2. Fill the bed-side oil tank with oil.

3. Add oil to the felt q of the shuttle race base. * When setting up the sewing machine and when

it hasn’t been used for an extended period of time, be sure to add 2-3 drops oil to the felt.

4. If using the liquid cooling tank w, fill it with silicon oil (100 mm2/s).

LK3-B434E Mark II

9-3. Draining the oil

9-4. Cleaning the control box air inlet port

9. MAINTENANCE AND INSPECTION

1. Remove and empty the waste oil container q whenever it is full.

2. After emptying the waste oil container q, screw it back into its original position.

Use a vacuum cleaner to clean the filter in the air inlet port w of the control box q at least once a month.

9-5. Cleaning the eye guard

9-6. Checking the needle

* If the machine is used while the air inlet port is

blocked, the inside of the control box will overheat. When this happens, the overheating error code (“Ed0”) will be displayed and you will not be able to operate the sewing machine.

Wipe the eye guard clean with a soft cloth.

NOTE:

Do not use solvents such as kerosene or thinner to clean the eye guard.

Always check that the tip of the needle is not broken and also the needle is not bent before starting sewing.

LK3-B434E Mark II

10. STANDARD ADJUSTMENTS

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.

Turn off the power switch and disconnect the power cord from the wall outlet at the following times, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury.

· When carring out inspection, adjustment and maintenance

· When replacing consumable parts such as the rotary hook and knife

10-1. Adjusting the needle bar height

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.

(DP × 5)

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

DP × 17

10-2. Adjusting the needle bar lift amount

(DP × 5) DP × 17

Adjust the needle bar lift amount as described below so that the tip of the rotary hook is aligned with the center of the needle when the machine pulley is turned to raise the needle bar from its lowest position until the lowest reference line on the needle (reference line B) is aligned with the lower edge of the needle bar bush q. * If using a DP × 5 needle, use the second reference line from the top of the needle (reference line b).

1. Open the support w in the direction of the arrow, and remove the felt support e.

2. Loosen the screw r, and move the driver to adjust so that the tip of the rotary hook is aligned with the needle center line. * When returning the felt support e, place it as shown in the illustration so as not to clamp the felt t, and

then gently press the felt t and the wick y until they are at the same height as the rotary hook race.

* Return the support w to its original position.

LK3-B434E Mark II

10. STANDARD ADJUSTMENTS

10-3. Adjusting the driver needle guard

Needle center line

Tip

Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw w and turn the eccentric shaft e to adjust so that the driver needle guard q contacts the needle. If the needle contact pressure is too great, skipped stitches may occur. On the other hand, if the driver needle guard q is not touching the needle, the tip of the inner rotary hook will obstruct the needle, resulting in an excessively high amount of friction.

10-4. Adjusting the needle clearance

0.01 - 0.08 mm

Turn the machine pulley to align the tip of the rotary hook with the needle center line. Then loosen the set screw q and turn the eccentric shaft w to adjust so that the clearance between the needle and the rotary hook is 0.01 - 0.08 mm.

10-5. Adjusting the shuttle race thread guide

Install the shuttle race thread guide q 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 catching of the thread may occur.

LK3-B434E Mark II

10. STANDARD ADJUSTMENTS

10-6. Adjusting the thread take-up amount

Thread take-up amount (stroke)

Become less

Become greater

At the time of shipment from the factory, the thread take-up amount (stroke) of the thread take-up lever q is set to the standard setting of 5 mm. You may need to adjust this setting depending on the sewing conditions to prevent the thread from pulling out at the sewing start. [Adjustment method]

Loosen the screw w and move the stopper (3.57 nut) e to adjust the operating angle of the thread take-up solenoid r. * To reduce the thread take-up amount, move the stopper e upward. * To increase the thread take-up amount, move the stopper e downward.

NOTE:

Do not increase the stroke of the thread take-up lever any more than is necessary. If the sub-thread tension is too high, the needle thread length may become too short and the thread may come out of the needle. Furthermore, if the sub-thread tension is too weak, the needle thread length may become too long and the underside of the article being sewn may become untidy.

10-7. Adjusting the movable knife

Loosen the nut w and move the connecting rod lever e to the left or right to adjust so that the V section A is aligned with the index mark B on the needle plate when the sewing machine is in the stopped position and the movable knife q is pushed to the machine pulley side so that there is no play.

LK3-B434E Mark II

10-7-1. Replacing the movable knife and fixed knife

10. STANDARD ADJUSTMENTS

1. Open the large shuttle hook cover, remove the bolts q and the feed plate w.

2. Remove the two screws e and the two screws r, and then remove the needle plate t.

3. Remove the thread trimmer connecting rod y from the connecting rod lever pin u.

0.5 mm

4. Remove the movable knife i and replace it with a new one. At this time, check that the movable knife i and the fixed knife o cut the thread cleanly. If necessary, adjust by using the appropriate movable knife washer !0 (supplied as accessories). * Apply grease to the outside of the collar !1 at this time.

5. Install the fixed knife o at a distance of 0.5 mm from the needle hole plate !2.

6. Place the thread trimming connecting rod y onto the connecting rod lever pin u, and then install to the needle plate t.

LK3-B434E Mark II

10. STANDARD ADJUSTMENTS

10-7-2. Adjusting the engagement of the movable knife and fixed knife

Fig. 1

Cutting edge

Movable knife

Fix knife

Cutting edge

A. After the movable knife and fixed knife are properly engaged, tighten the screw as shown in Fig.1. B. Turn the movable knife (in the direction of the arrow) while the screw is still tightened. C. Loosen the screw. D. Turn the movable knife (in the direction of the arrow) while the screw is still loosened. Repeat above steps A, B, C and D four or five times to maintain the cutting performance of the knife.

LK3-B434E Mark II

10-8. Adjusting the work clamp lift amount

The maximum work clamp lift amount is 17 mm (25 mm for pneumatic, 17 mm for machines with inner clamping device) from the top of the needle plate. The lift amount is adjusted as shown in the table at the time of shipment.

[Solenoid type]

10. STANDARD ADJUSTMENTS

Uses

Lift amount

Medium

materials

10 mm

Heavy

materials

14 mm

17 mm max.

To adjust the work clamp lift amount, loosen the bolt q and move the presser arm lever plate w up or down. * If movement is sluggish when the work clamp e is being raised and lowered, it may not be possible to

increase the work clamp e lift amount. Apply grease to the bottom of the presser plate r to the top of the presser arm lever plate w and to the sliding part of the work clamp e (grease is already applied at the time of shipment), and check that the

movement becomes easier. * If the work clamp e cannot be raised or lowered, error code “E-61” or “E-63” will be displayed. * Check that there is a gap between the presser arm lever plate w and the presser plate r when the presser

foot is lowered.

[Pneumatic type]

25 mm max.

(17 mm max. for machines with inner clamping device)

1. Raise the work clamp q and loosen the screws w.

2. Adjust the work clamp lift by moving the presser levers e and r up and down and then tighten the screws

w. * If movement is sluggish when the work clamp q is being raised and lowered, it may not be possible to

increase the work clamp q lift amount. Apply grease to the sliding part of the work clamp q (grease is already applied at the time of shipment), and check that the movement becomes easier.

LK3-B434E Mark II

10. STANDARD ADJUSTMENTS

10-9. Work clamp interchangeability

10-10. Adjusting the needle up stop position

t u

The BAS-311E work clamp can also be used with the B434E Mark ll. Replace the feed bar guide cover q with the feed bar guide cover assembly, LL w (optional). Then, change the installation position for the presser arm assembly e from the standard installation position A to installation position B.

The needle up stop position is adjusted so that the index mark w on the machine pulley q is inside the mark r on the belt cover e. If adjustment is necessary, loosen the screw t at the “U” mark of the machine pulley q and adjust the po- sition of the machine pulley q. The machine pulley q stops later if it is turned clockwise, and it stops earlier if it is turned counterclockwise.

NOTE:

The screw y at the “D” mark is an adjusting screw for the needle down detection function and is adjusted to match the feed timing, so it should not be loosened. The screw u is a screw for detecting the machine stop position, and should not be loosened.

* If the index mark w is not inside the mark r when

the sewing machine is started, error code “E-50” will be displayed. Turn the machine pulley to move the index mark w to the correct position and then start the sewing machine.

LK3-B434E Mark II

10-11. Adjusting the thread wiper

[Solenoid type]

10. STANDARD ADJUSTMENTS

2 ± 0.5 mm

Approx. 20 mm

1. Loosen the set screw w and move the wiper arm support e up or down to adjust so that the clearance

between the top of the thread wiper and the needle point q is 2 ± 0.5 mm when the thread wiper is aligned with the center of the needle.

* Before carrying out this adjustment, check that the needle bar is lowered 5 to 5.5 mm from the needle up

stop position when the sewing machine stops.

2. Loosen the screw r and move the thread guide connecting plate t up or down so that the thread wiper is

approximately 20 mm from the needle when it is at the standby position.

[Pneumatic type]

2 ± 0.5 mm

Approx. 30 mm

1. Loosen the set screw w and move the wiper arm support e up or down to adjust so that the clearance

between the top of the thread wiper and the needle point q is 2 ± 0.5 mm when the thread wiper is aligned with the center of the needle.

* Before carrying out this adjustment, check that the needle bar is lowered 5 to 5.5 mm from the needle up

stop position when the sewing machine stops.

2. Loosen the two bolts r and move the wiper solenoid cover t up or down so that the thread wiper is

approximately 30 mm from the needle when it is at the standby position.

LK3-B434E Mark II

10. STANDARD ADJUSTMENTS

10-12. Checking the input sensor and DIP switch input

B430E Series

PROGRAM NO.

POWER

X-SCALE

P1 P2

RESET

TEST

BOBBIN.WIND

Y-SCALE

SPEED

COUNTER

SELECT

P4P3

1. When the X-SCALE indicator q is illuminated and the RESET switch e is pressed while the TEST switch w

is being pressed, the state of the X home position signal will appear on the display window r.

· When sensor is ON · When sensor is OFF

2. Each time the SELECT switch t is pressed, a different indicator will illuminate and the operating condition

for the corresponding item will appear on the display window r.

· When X-SCALE indicator is illuminated...... X home position sensor (ON when home position detected)

· When Y-SCALE indicator is illuminated ...... Y home position sensor (ON when home position detected)

· When SPEED indicator is illuminated ......... Synchronizer ( * 1)

· When COUNTER indicator is illuminated ... Presser sensor (ON when presser is lowered) ... For solenoid

specification

*1 The synchronizer display simultaneously displays the needle up signal (3rd digit), the 24-section signal

(2nd digit) and the needle down signal (1st digit).

[ H L L] “H” when the sensor is on, and “L” when the sensor is off

Needle down signal 24-section signal Needle up signal

If the DIP switches at the side of the operation panel are changed at this time, the number of the DIP switch which was changed will be displayed in the 4th digit position of the display window r for about one second.

NOTE:

The DIP switch can be changed at this time without turning off the power so that you can check the DIP switch input. However, you should normally always turn off the power when changing DIP switch settings.

3. Press the TEST switch w again to return the display to the normal condition.

LK3-B434E Mark II

10-13. Checking the input voltage

POWER

RESET

B430E Series

PROGRAM NO.

X-SCALE

Y-SCALE

SPEED

10. STANDARD ADJUSTMENTS

P1 P2

P4P3

Specifications

200V

220V

230V

100V 380V 400V 415V

TEST

BOBBIN.WIND

COUNTER

SELECT

Display

Notes

[090 - 110]

[100 - 120]

“100” is displayed when the input voltage is 200 V.

[105 - 125]

“110” is displayed when the input voltage is

[100 - 120]

100V (for 100-V specs.), 380V (for 380-V specs.), 400V (for 400-V specs.) or 415V (for 415-V specs.).

1. Turn on the power switch.

2. Press the SELECT switch q until the Y-SCALE indicator w illuminates.

3. While pressing the TEST switch e, press the RESET switch r.

4. If the input voltage is normal, the input voltage conditions will be shown in the display window t as

indicated in the table above.

5. Press the TEST switch e again to return the display to the normal condition.

10-14. Clearing all memory settings

If the sewing machine stops operating normally, the cause may be that an incorrect memory setting may have been made by means of the memory switch, for instance. In such cases, carry out the following procedure to clear the memory, and also check the DIP switch settings. [ Method ] While pressing the RESET switch, turn on the power. This will clear all of the memory setting.

NOTE:

This operation causes memory switches to be returned to their initial settings, and user program setting to be cleared.

LK3-B434E Mark II

10. STANDARD ADJUSTMENTS

10-15. Moving stitch patterns

• Programs which have already been programmed can be moved up, down and to the left and right. (How-

ever, such patterns will be reset if the power supply is turned off or the program number is changed.)

• The feed position can be set to the any position desired.

B430E Series

PROGRAM NO.

POWER

RESET

TEST

BOBBIN.WIND

X-SCALE

Y-SCALE

SPEED

COUNTER

SELECT

P1 P2

P4P3

1. Select the program number, and then press the start switch once to move the feed mechanism to the

sewing start position.

2. Press the SELECT switch q until the PROGRAM NO. indicator w illuminates.

3. While pressing the TEST switch e, press the RESET switch r.

* The TEST indicator t will illuminate and < > will appear in the display window y.

4. Press the SELECT switch q so that either the X-SCALE indicator u or Y-SCALE indicator i illuminates.

5. Press the DISPLAY SET switches o to move the feed mechanism one pulse at a time.

• If the DISPLAY SET ( ) switch is pressed while the X-SCALE indicator is illuminated, the feed mechanism will move to the left.

• If the DISPLAY SET ( ) switch is pressed while the X-SCALE indicator is illuminated, the feed mechanism will move to the right.

• If the DISPLAY SET ( ) switch is pressed while the Y-SCALE indicator is illuminated, the feed mechanism will move down.

• If the DISPLAY SET ( ) switch is pressed while the Y-SCALE indicator is illuminated, the feed mechanism will move up.

6. When the TEST switch e is pressed after the above fine adjustments have been made, the TEST indicator t and display window y will both switch off and movement of the stitch pattern will be completed.

NOTE:

When moving the stitch pattern, take the whole of the pattern area into consideration so that no parts extend outside the sewing area when the pattern is sewn.

* If you would like to set the feed position to a desired position, carry out steps 2. to 6. above while the display window

y is flashing. The stitch pattern will not be moved at this time.

LK3-B434E Mark II

10-16. Adjustment of air pressure (for pneumatic)

Increase pressure

1. Air pressure should be 0.5 Mpa.

2. Adjust the air pressure for the reversal cylinder to

3. If water stands in the bottle of the integrator q,

10. STANDARD ADJUSTMENTS

The air pressure can be adjusted by pulling up and turning the control knob w on the integrator q. After adjustment is complete, push the control knob w downward to lock it.

stay within such a range that the presser crank r rotates reversely when pressing the sewing material with the pressure plate e. (Approx. 0.3 Mpa) For adjustment, pull up and, turn the control knob y on the air regulator t. After adjustment is complete, push the control knob y downward to lock it.

turn the drain cock u in the direction indicated by an arrow to drain the water.

10-17. Adjustment of inner clamping device

(B)”

”(A)

■ Adjustment of the positioning plates

Loosen the screws w, and adjust the position of the positioning plate R e so that the label q can be evenly laid out between the front and back seams (A). Next, loosen the screws r, and adjust the position of the positioning plate L t so that the presser plate can be evenly laid out between the left and right seams (B).

■

Adjustment of the presser crank horizontal position

Loosen the nut e and push in or pull out the adjusting bolt r so that the presser crank w can be horizontal when the reversal cylinder plunger q is moved to the left extreme.

LK3-B434E Mark II

11. USING THE COUNTERS

11-1. Using the bobbin thread counter

If you use the bobbin thread counter to set the number of articles which can be sewn with the amount of bobbin thread available, you can stop the bobbin thread running out in the middle of sewing a pattern.

1. Press the SELECT switch q until the COUNTER indicator w illuminates.

2. While pressing the TEST switch e, press the RESET switch r.

B430E Series

PROGRAM NO.

POWER

RESET

TEST

BOBBIN.WIND

X-SCALE

Y-SCALE

SPEED

COUNTER

SELECT

P1 P2

P4P3

5. Each time the sewing of a single article is completed, the number being displayed in the display window y will become smaller. When the number of articles set by the bobbin thread counter have all been sewn, “0000” will be displayed in the display window y, and an alarm will start sounding continuously. * The sewing machine will not operate during this time, even if the foot switch is depressed.

6. Replace the bobbin, and then press the RESET switch r. * The alarm will then stop sounding, and the number which was set in step 3. above will be re-displayed in

the display window y.

* The COUNTER indicator w will flash and the

counter will switch to bobbin thread counter setting mode.

3. Press the DISPLAY SET switches t to set the number of articles to be sewn.

• The bobbin thread counter can be set to sew a

number of articles from one (“0001”) through to 9999 (“9999”).

If the bobbin thread counter is set to “0000”, sewing is carried out without the number of articles sewn being counted.

• If you press the RESET switch r while setting the bobbin thread counter, the setting will return to “0000”.

4. Press the TEST switch e. * The number displayed in the display window y

will then be stored as the bobbin thread counter setting.

11-2. Using the production counter

The production counter can be displayed in the display window y separately from the bobbin thread counter.

1. Press the SELECT switch q until the SPEED indicator w illuminates.

2. While pressing the TEST switch e, press the RESET switch r.

B430E Series

PROGRAM NO.

X-SCALE

Y-SCALE

SPEED

COUNTER

SELECT

POWER

RESET

TEST

BOBBIN.WIND

P1 P2

P4P3

* The COUNTER indicator t and the SPEED indi-

cator w will illuminate, and the production counter will be displayed in the display window y.

• Press the RESET switch r to reset the produc-

tion counter to “0000”.

• You can also press the DISPLAY SET switches

u to set the production counter to the desired value.

3. When the foot switch is depressed, the sewing machine will start sewing.

4. If you press the TEST switch e or the SELECT switch q, the display will return to showing the bobbin thread counter.

LK3-B434E Mark II

12. CHANGING FUNCTIONS USING THE DIP SWITCHES

12-1. Operation panel DIP switches

The functions shown in the table below can be changed by means of these DIP switches q. * All DIP switches are set to OFF at the time of ship-

ment.

NOTE:

Always turn off the power before setting the DIP switches.

Switch

DIPA-1

DIPA-2 DIPA-3 DIPA-4 DIPA-5

DIPA-6

DIPA-7 DIPA-8

Motion when set to ON

Presser does not automatically lift after sewing is completed.

Pedal mode is switched. User program mode is available.

–

The presser does not rise automatically when a split is found. Displays the enlargement/reduction ratio in millimeter units instead of as a

percentage. (After changing this setting, be sure to carry out the auto-clear operation by referring to page 44.)

Enlargement of pattern size is not available. Program number is fixed.

See “14. Setting the presser mode”

LK3-B434E Mark II

12. CHANGING FUNCTIONS USING THE DIP SWITCHES

12-2. DIP switches inside the control box

DANGER

The functions can be changed as shown in the table below by changing the positions of the DIP switches q. * All DIP switches are set to OFF at the time of ship-

ment.

NOTE:

When opening the cover, hold it securely so that it does not fall down.

Switch

DIPB-1 DIPB-2 DIPB-3 DIPB-4 DIPB-5 DIPB-6

DIPB-7

DIPB-8

*NOTE:

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

First two stitches are sewn at a low speed of 260 rpm. Last two stitches are sewn at a low speed of 260 rpm.

–

Last two stitches are sewn at a low speed of 700 rpm. First two stitches are sewn at a low speed of 400 rpm. Low speed sewing is not performed at the start of sewing.

The motor operates in reverse when the upper shaft stops, to return the needle bar to close to its highest position.

–

Motion when set to ON

*NOTE

LK3-B434E Mark II

12. CHANGING FUNCTIONS USING THE DIP SWITCHES

12-3. Using user programs

User program ... It can store sixteen different programs which can include details such as the program number, X scale, Y scale and sewing speed. If you are sewing certain patterns over and over again, it is useful to record the settings for these patterns into a user program.

Recording a user program

1. Turn off the power switch and then set DIP switch A-3 of the DIP switches q to ON.

2. Turn on the power switch. While pressing the TEST switch w, press the SELECT switch e.

* All of the menu indicators (r to i) will illuminate and the

mode will switch to recording mode.

* In addition, “PP 1” will appear in the display window o to

indicate that user program No.1 is being recorded. (Once recording of No.1 is completed, No.2 will be displayed; once No.2 is completed, No.3 will be displayed. Thus the next unrecorded program letter is always displayed.)

POWER

RESET

TEST

BOBBIN.WIND

B430E Series

PROGRAM NO.

X-SCALE

Y-SCALE

SPEED

COUNTER

SELECT

P1 P2

P4P3

3. Press the SELECT switch e.

* The PROGRAM NO. indicator r will illuminate.

4. Press the DISPLAY SET switches !0 to select the number for the program that you would like to record.

5. Press the SELECT switch e. * The X-SCALE indicator t will illuminate.

6. Press the DISPLAY SET swithes !0 to select the X scale setting that you would like to record.

7. Press the SELECT switch e. * The Y-SCALE indicator y will illuminate.

8. Press the DISPLAY SET switches !0 to select the Y scale setting that you would like to record.

9. Press the SELECT switch e. * The SPEED indicator u will illuminate.

10. Press the DISPLAY SET switches !0 to select the speed setting that you would like to record.

11. Press the SELECT switch e. * This completes the recording of user program No.1.

* “PP 2” will then appear in the display window o, to indicate that user program No.2 is now being recorded.

Repeat steps 3. through to 11. to record further programs as desired.

12. Press the TEST switch w. This completes the recording.

* The menu indicators (e to i) will all illuminate and “p1” will appear in the display to indicate that user program No.1 is currently

selected.

LK3-B434E Mark II

12. CHANGING FUNCTIONS USING THE DIP SWITCHES

Using a user program

1. Press the DISPLAY SET switches !0 to select the speed program number for the user program that you would like to use.

*The user program numbers P1 to P4 can also be selected using the user program switches !1.

2. Depress the foot switch to the second step.

3. Check the sewing pattern (see P.25), and then sew the pattern selected.

Clearing the user programs

1. Switch the machine to recording mode by the procedure in steps 2. of recording a user program.

2. Use the DISPLAY SET switches !0 to specify the user program number which is to be cleared of data.

3. Press the RESET switch !2. * The buzzer will sound and the user program with the number selected will be cleared. * If you press and hold the RESET switch !2 until after the buzzer has sounded twice, all user programs

will be cleared.

NOTE:

If data has been recorded in user programs P1, P2, P3 and P4 and you then clear the data in user program P2, the contents of P3 will be transferred to P2, and the contents of P4 will be transferred to P3.

LK3-B434E Mark II

13. CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES

13.

CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES

The functions of the switches on the operation panel q can be changed to carry out special functions.

NOTE:

After changing the memory switch settings, press the power switch to turn the power off and then back on again.

1. Turn on the power switch.

2. While pressing the TEST switch w, press the BOBBIN. WIND switch e. * “00 - - ” will appear in the display window r.

3. Press the DISPLAY SET switches t to set the two digits at the left of the display window r to the corresponding number (00 to 4F) of the function shown in the table below that you would like to select.

4. When the BOBBIN. WIND switch e is pressed, the two spaces at the right in the display window will change from “ - - ” to “ON”.

POWER

RESET

TEST

B430E Series

PROGRAM NO.

X-SCALE

Y-SCALE

SPEED

COUNTER

P1 P2

P4P3

* If you press the RESET switch y at this time,

memory switches will be returned to their initial settings (factory default settings).

5. Press the TEST switch w.

BOBBIN.WIND

SELECT

* The display will return to normal.

■ Memory switches 00 - 0F

Switch

memo-00

memo-01

Motion when set to ON

At the end of sewing, the feed plate will be returned to the sewing start point via mechanical home position.

Work clamp will move to the sewing start point, and then will be lifted.

Initial value

Solenoid

Pneumatic

Feed will move automatically to the next starting point at the same time as

memo-02

a user program is switched.

(Normally it moves to the starting point after sewing starts.)

memo-03

memo-04

memo-05

memo-06 memo-07 memo-08

memo-09

memo-0A

memo-0b memo-0c

memo-0d

memo-0E

memo-0F

When sewing using programs, the programs which have been set will be sewn in numerical order. (Cycle sewing mode is set.)

The sewing speed will be fixed at the minimum speed for the maximum pitch of the sewing data. (Set this to ON if you are concerned that vartations in pitch may cause changes in the sewing speed.)

Increases the presser solenoid lifting force (Set to ON when using the optional spring for extra-heavy material)

Enlargement and reduction ratio settings for X and Y become the same. The inner clamping device can be used with pneumatic specifications. Test feeding is carried out stitch by stitch when the foot switch is depressed.

The sewing start point becomes the reference point for enlargements and reductions. (The reference point for enlargements and reductions is normally the center of the sewing frame.)

– –

Needle stops in up position during emergency stop. The bar tacking stitches (with a pitch of less than 1 mm) are also enlarged

and reduced. (Normally stitches with a pitch of less than 1 mm are not enlarged or reduced.)

Test feeding will be performed at the same speed as that for actual sewing. (This is used for checking feeding operation.)

After sewing is finished, the work clamp automatically opens and closes once (practice operation).

*1ON for solenoid/heavy material specifications, and “--” for solenoid/medium material specifications *2ON when the inner clamping device is being used, and “--” at other times

LK3-B434E Mark II

13. CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES

■ Memory switches 10 - 1F

Switch

Motion when set to ON

memo-10

–

memo-11

memo-12

memo-13

memo-14

Pneumatic wiper can be used. (Pneumatic wiper is available by special order.)

The inner clamping device moves forward at the 1/4-way mark and returns at the 3/4-way mark for the pattern being sewn.

Solenoid wiper can be used. When using the inner clamping device, shunting to prevent interference

memo-15

between the inner clamping device and the needle is not carried out after the sewing end.

Initial value

Solenoid

Pneumatic

memo-16

memo-17 memo-18 memo-19

memo-1A

Needle cooler output is enabled. (Needle cooler is available by special order.)

Thread take-up device is not operated at the sewing end. Thread take-up device operates one stitch before the sewing end. For solenoid specifications, presser position errors are not detected. Needle up stop position errors are not detected.

Presser can be moved up and down before the home position is detected.

memo-1b

(Normally the presser cannot be moved up and down until after the home position has been detected.)

memo-1c

memo-1d

memo-1E

memo-1F

–

For pneumatic specifications, the air pressure detection switch is enabled. (The air pressure sensor is a special-order option.)

Errors can be reset using the EMERGENCY STOP switch. Thread is not trimmed when an emergency stop occurs during sewing.

■ Memory switches 20 - 2F

Switch

memo-20

memo-21

memo-22

memo-23

memo-24

Machine head from previous B430E series is used. (Only the operation panel and box are Mark II.)

Rotating-type thread breakage detector operates. (Device is available by special order.)

During thread breakage detection, sensitivity is decreased from 8 to 14 stitches at the sewing start. (Sensitivity during sewing is three stitches.)

When DIP switch A-8 is simultaneously ON, setting values changed using the operation panel are ignored.

The lower thread sensor operates. (The lower thread sensor is a specialorder option.)

memo-25

–

memo-2F

Motion when set to ON

Initial value

Solenoid

Pneumatic

LK3-B434E Mark II

13. CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES

■ Memory switches 30 - 4F

30 to 4F are set by entering two-digit values. These values are incremented using the P2 switch, and decremented using the P4 switch.

Switch

memo-30

memo-31 memo-32

memo-33

memo-34

memo-35 memo-36

memo-37

memo-38 memo-39

memo-3A

memo-3b

memo-3c

memo-3F

memo-40

memo-41

memo-42

memo-43

memo-44

memo-45

memo-4F

Possible setting range

0 - 99

0 - 60

12 - 25

1 - 10

0 - 5

3 - 9

—

1 - 20

1 - 20 1 - 20 1 - 20 1 - 20

—

1 - 5

—

0.5 - 10

1 - 3

0 - 3

—

× 100rpm

Units

× 7.5°

Needle

—

× 7.5° × 7.5°

× 7.5° × 7.5° × 7.5°

—

Initial value

Limits the maximum area in the horizontal direction (X)

60 25

—

10 10 10 10

—

(If the value is set to 99, the maximum length allowed will be 100 mm.)

Limits the maximum area in the vertical direction (Y) Changes the maximum sewing speed. Changes the feed timing

1 (Fast) ←5 (Standard) →10 (Slow) The sewing speed at the sewing start is 400 rpm for the

specified number of stiches. Changes the sewing start speed specified by memo-34.

—

Changes the feed timing one stitch before the sewing end. 1 (Fast) ←10 (Standard)→20 (Slow)

Changes the feed timing two stitches before the sewing end. Changes the feed timing for the third stitch at the sewing start. Changes the feed timing for the second stitch at the sewing start. Changes the feed timing for the first stitch at the sewing start.

—

Changes the test feeding speed (with no material).

1 (Fast) ←→5 (Slow)

—

Changes the work clamp operating mode for pneumatic specifications. Refer to “14. Setting the work clamp

mode” for details on the setting values. When set to “0”, the mode is selected according to the settings for DIP switches A-1 and A-2.

5 Specification with inner clamping device

Changes the allowable speed/sewing pitch.

1 (Fast) ←→3 (Standard) Changes the path taken when moving from the machine

home position to the start position.

0: Across inside of work clamp 1: Top-left 2: Bottom-left 3: Bottom-right

Specification with inner clamping device

(Does not pass across inside of clamp)

—

Explanation

LK3-B434E Mark II

13. CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES

13-1. Using the cycle sewing function

What is the cycle sewing function?

The cycle sewing function lets you program up to four patterns for cycle sewing of patterns in a predeter mined order.

Recording a cycle sewing program

1. Set DIP switch q-3 to ON, and then record the patterns which you would like to use for cycle sewing. (Refer to “12-3. Using user programs”.)

* Cycle sewing cannot be performed using patterns (P1 to P16)

which have not had a user program assigned.

2. Set the memo-03 switch to ON. (Refer to page 52 for how to do this.)

3. While pressing the TEST switch w, press the SELECT switch e.

* All of the menu indicators (r to i) will illuminate and the

mode will switch to recording mode.

4. Press the P1 switch o.

•“Pc 1” will appear in the display window !0 to indicate that cycle sewing program No. 1 is being recorded.

* Programs P2, P3 and P4 switches can also be used for pro-

gramming.

POWER

RESET

TEST

BOBBIN.WIND

B430E Series

PROGRAM NO.

X-SCALE

Y-SCALE

SPEED

COUNTER

SELECT

P1 P2

P4P3

5. Press the SELECT switch e. *The PROGRAM No. indicator r will illuminate and “1- -” will appear in the display window !0.

6. Press the DISPLAY SET switches !1 to select the number for the user program that you would like to record.

7. Press the SELECT switch e. *“2- -” will appear in the display window !0.

8. Press the DISPLAY SET switches !1 to select the number for the user program that you would like to record.

9. Repeat steps 5. and 6. to record all programs which you would like to include for cycle sewing.

* After “9- -” is displayed, “A- -”, “b- -”, “c- -”, “d- -”, “E- -” and “F- -” will be displayed in that order so that up to the 15th pattern can

be recorded.

* If you would like to return to a previous number during the recording procedure, press the P1 switch so that “Pc 1” is displayed, and

then return to step 4.

10. Press the TEST switch w.

• This completes the setting of cycle sewing program No. 1.

* The menu indicators (r to i) will all illuminate and “c1-1” will appear in the display window !0 to indicate that the cycle sewing

program No.1 is currently selected.

LK3-B434E Mark II

13. CHANGING SPECIAL FUNCTIONS USING THE MEMORY SWITCHES

Using a cycle sewing program

1. When “c1-1” is flashing in the display window !0, press the foot switch to the second step.

2. Start sewing.

3. “c1-1”, “c1-2”, “c1-3” are sewn in order for each article, and when the last-recorded pattern has been sewn, the display returns to “c1-1".

* If you press one of the DISPLAY SET switches !1 when “c1-*” is displayed, you can return to the previous stitch pattern or skip a

stitch pattern.

* If you press the SELECT switch e when “c1-*” is displayed, you can check the contents of the recorded user program.

Clearing a cycle sewing program

1. Switch the machine to recording mode by the procedure in step 3. of recording a user program.

2. Use one of the P* switches (user program switches) to specify which cycle sewing program to clear.

* Press the P1 switch o if you would like to clear cycle sewing program No. 1. (“Pc 1” will be displayed.)

3. Press the RESET switch !2.

* The recorded contents of the specified cycle sewing program will then be cleared. * If you press and hold the RESET switch !2 until after the buzzer has sounded twice, all cycle sewing programs will be cleared.

NOTE:

If you clear a user program after any cycle sewing programs have been recorded, all recorded cycle sewing programs will also be cleared.

LK3-B434E Mark II

14. SETTING THE WORK CLAMP MODE

14-1. Setting solenoid work clamp mode

Through the combination of DIP switches A-1 and A-2 on the operation panel, presser motions can be set as follows:

DIPA-1

–

DIPA-2

– –

Pedal specifications

Single pedal Single pedal

Two pedals

Raising the presser at the sewing end Presser is raised automatically. (factory default settings) Presser is raised by pressing the pedal.

Presser is raised automatically, then it is lowered by pressing the pedal.

Presser is kept lifted while the presser pedal is pressed.

14-2. Setting pneumatic work clamp mode

Through the combination of DIP switches A-1 and A-2 on the operation panel, presser motions can be set as follows:

■ When memo-42 = 0 (initial value for all specifications other than inner clamping specifications)

DIPA-1

–

■ Special memo-42 settings for pneumatic specifications

DIPA-2

ON ON

–

Pedal specifications

Single pedal Single pedal

Two pedals

Raising the presser at the sewing end Presser is raised automatically. Presser is raised by pressing the pedal.

Presser is raised automatically, then it is lowered by pressing the pedal. (factory default settings)

Presser is kept lifted while the presser pedal is pressed.

memo-42

Pedal specification

Two pedals

Three pedals

(Option)

Two pedals9

Two pedals10

Raising the presser at the sewing end

Left presser drops when presser pedal is at the 1st step, and right presser drops when presser pedal is at the 2nd step. Raising is carried out in the reverse order. * Initial value for inner clamping specifications only * Setting used when using the light work clamp function (Refer to “14-3.

Light work clamp”.)

Right presser drops when presser pedal is at the 1st step, and left presser drops when presser pedal is at the 2nd step. Raising is carried out in the reverse order.

The left/right operating sequence changes alternately for each item sewn when using two-pedal operation. Starts with right → left.

The left pedal is used to raise and lower the left presser, and the right (center) pedal is used to raise and lower the right presser. The start (right) pedal is used to start sewing. Furthermore, when DIP switch A-2 is at ON, and if one presser is already lowered, pressing the start pedal causes the other presser to be lowered and then sewing starts.

When the presser pedal is depressed to the 1st step, both left and right pressers are raised simultaneously. When it is pressed to the 2nd step, sewing starts.

When the start pedal is depressed, both left and right pressers are lowered simultaneously. When the start pedal is released, sewing starts.

When memo-42 has been used to make a special setting, DIP switches A-1 and A-2 function as follows.

• When DIP switch A-1 is at ON, the pressers are not raised automatically at the sewing end.

• DIP switch A-2 is ignored except when memo-42 = 8.

LK3-B434E Mark II

14. SETTING THE WORK CLAMP MODE

14-3. Light work clamp

For pneumatic specifications, the hose connections can be changed so that the pressers are made to lower gently when the presser pedal is depressed to the 1st step, and firmly when the presser pedal is depressed to the 2nd step. This makes it easier to carry out position matching when attaching small articles such as labels.

[Memory switch setting]

Set memo-42 to 5 for two-pedal mode so that the pressers lower in the order of left then right for the standard hose connection. (Refer to “13. Changing special functions using the memory switches”.)

■ Hose connections for light work clamp operation by both pressers

Branch

Plug

[How to use]

1. Depress the presser pedal to the 1st step to lower the pressers and apply a light pressure. You can then position small articles such as labels at this time.

2. After checking that everything is positioned correctly, depress the presser pedal to the 2nd step to firmly clamp the article being sewn.

3. Press the start pedal to start sewing.

■ Other hose connections and corresponding operations

The hoses can be connected in combinations other than the one shown above so that only one side of the presser operates in light work clamp mode.

Branch and plug

connectors

Branch: 1B, 2A

Plug: 1A, 2B

Branch: 1B

Plug: 2B

Branch: 1B

Plug: 2B

Branch: 2A

Plug: 1A

Branch: 2A

Plug: 1A

Cylinder connectors

ABCD

LK3-B434E Mark II

Operation when presser pedal is depressed to the 1st step

Both pressers operate in light work clamp mode (example shown above)

Only left presser lowers, and it lowers in light work clamp mode

Only right presser lowers , and it lowers in light work clamp mode

Both pressers lower, but only left presser lowers in light work clamp mode

Both pressers lower, but only right presser lowers in light work clamp mode

14. SETTING THE WORK CLAMP MODE

14-4. Setting reverse work clamp mode

Basic setting

1. If installing the inner clamping device as a later option, set the memory switches as follows. (This will complete inner clamping specification settings.)

• Set the memo-07 switch to ON.

• Set the memo-42 switch to “5”.

2. Make the following settings if necessary.

1. 1/2 reverse mode The inner clamping device operates at the 1/2-way mark for the pattern being sewn.

Example

start

memo-13

–

reverse

2. 1/4 reverse mode The inner clamping device operates at the 1/4-way and 3/4-way marks for the pattern being sewn.

Example

end

start

reverse

memo-13

[Notes to sewing]

1. Reverse stitching is possible within 4.5 mm left and

Reference point

right from the reference point. However, note that if a non-standard work clamp is being used, the reverse stitching area will be-

4.5 mm4.5 mm

come smaller.

Lift

15 mm

Thickness of material

19 mm

LK3-B434E Mark II

2. When the work clamp q reverses after sewing is completed, the work clamps are retracted so that they do not touch the needle. However, sometimes it is not necessary to retract the work clamps if the material is thin. In such cases, if memory switch memo-15 is set to on, the work clamps will not be retracted so that the cycle time can be shortened. However, if making this change to the setting, move the work clamp to the sewing end position (release the air and move the work clamp by hand) to check that the work clamps do not touch the needle.

15. TABLE OF ERROR CODES

DANGER

If a malfunction should occur with the sewing machine, a buzzer will sound and an error code will appear in the display window. Follow the remedy procedure to eliminate the cause of the problem.

Code

E-10

E-11

E-12

E-13

E-20

E-21

E-30

E-31

Cause

Emergency stop switch was pressed.

Emergency stop switch was pressed during sewing.

Emergency stop switch is being continually pressed, or emergency switch connection error.

Machine specification select connector is not connected properly.

Problem with machine motor stopping, or synchronizer connection error.

Machine motor operation error.

Data is outside possible sewing area due to enlargement ratio setting.

Stitch pattern data overlaps the sewing area when area limiting is active.

Remedy

Turn the EMERGENCY STOP switch clockwise to release the lock, and then press the RESET switch to reset the error.

Turn the EMERGENCY STOP switch clockwise to release the lock, and then press the RESET switch to reset the error. You can then press the BOBBIN. WIND switch to repeat the sewing.

Turn off the power and check.

Turn off the power and check if connectors P3 is disconnected.

Turn off the power, and then turn the machine pulley to check if the machine has locked up. Check the synchronizer connection. Check if connectors P11, P12 and P13 are disconnected.

Turn off the power and check the ground wire connection.

Press the RESET switch, and then set the enlargement ratio again.

Press the RESET switch, and then reset the memory switches “30” and “31” or enlargement ratio.

E-32

E-40

E-41

E-42

E-50

E-60 E-61 E-62 E-63

E-70

The data format of the user program (% or mm) does not match the setting of DIP switch A-6.

Length of a stitch exceeds 10 mm.

Abnormality in the sewing data.

Invalid program number specified.

Needle bar does not stop when the needle is raised.

Presser has not been lowered. Presser cannot be raised. Presser is not raised. Presser cannot be lowered.

Cooling fan does not operate.

LK3-B434E Mark II

After changing the setting of DIP switch A-6, clear all memory settings. (Refer to “10-14. Clearing all memory settings”.)

Press the RESET switch, and then set the enlargement ratio again.

If programming a new sewing data, repeat the procedure from the beginning.

Press the RESET switch and specify a correct number.

Turn the pulley to align the index mark with the needle up stop position. (Refer to “10-10. Adjusting the needle up stop position”.) Check the V-belt tension. (Refer to “3-15. Installing the V-belt”.)

Refer to “17. Troubleshooting”. Turn off the power and check the connection of presser sensor connector P1.

Turn off the power, and then check if the cooling fan is blocked with scraps of thread.

15. TABLE OF ERROR CODES

Code

E-80

E-81

E-82

E-90

E-91

E-A0

E-b0

E-b1

E-d0

E-E0

Cause

Motor PROM is not correctly inserted. Foot switch was depressed when the

power was turned on. An operation panel switch was depressed

when the power was turned on. Abnormal drop in power supply voltage,

or power was turned on again immediately after it was turned off.

Abnormal rise in power supply voltage.

Home position cannot be detected (malfunction of home position sensor), or malfunction of power supply circuit board.

You tried to change the program number when DIP switch A-8 was set to ON.

No sewing data available.

Heat sink of control circuit board is abnormally hot. Malfunction of EEPROM (malfunction of

main circuit board).

Turn off the power and check.

Turn off the power and check the operation panel. Check that all panel cords are normal.

Turn off the power and check the input voltage. After turning off the power, wait 3 seconds or more before turning it on again. (Refer to “10-13. Checking the input voltage”.)

Turn off the power and check the input voltage. (Refer to “10-13. Checking the input voltage”.)

Turn off the power and check the connection of home position sensor connector P1.

Press the RESET switch. Set DIP switch A-8 to OFF before trying to change the program number.

Replace the PROM with one which contains sewing data.

Turn off the power and clean the air intake port of the box. Turn off the power, and turn it back on. If the error

continually occurs, contact a qualified service technician.

Remedy

Press the RESET switch to reset the error. However, the data (memory switches, display and user programs) will be reset to the backup data or initialized.

Press the RESET switch to reset the error. However, the data (memory switches, display and user programs) will all be initialized.

Turn off the power and contact a qualified service technician.

Turn off the power and check if connectors P16 is disconnected.

Turn off the power and contact a qualified service technician.

E-E1

E-E2

E-F0

E-F1

E-F2

Corrupted EEPROM data, or main PROM version has been upgraded.

Corrupted EEPROM control information data.

Solenoid short-circuit (malfunction of main circuit board), or power relay is not operating (malfunction of power supply circuit board).

Bad connection in cable between power supply circuit board and main circuit board.

Abnormal current detected in power supply circuit board.

■ Errors generated when optional equipment is connected

Code

Cause

Turn the EMERGENCY STOP switch clockwise to

E-14

Thread breakage detected.

release the lock, and then press the RESET switch to reset the error. You can then press the BOBBIN. WIND switch to repeat the sewing.

Turn off the power and check. If drops in air

E-15

Air pressure drop error.

pressure are not being detected, clear all memory settings and then set the memo-1d switch to OFF.

Remedy

E-16

Bobbin thread sensor mechanism error

REFERENCE segment LED alphabet

Panel display

Text display A b c d E F 6 H L o

Turn off the power and check. If the bobbin thread amount is not being detected, clear all memory settings and then set the memo-24 switch to OFF.

LK3-B434E Mark II

16. GAUGE PARTS LIST ACCORDING TO SUBCLASSES

The following are standard gauge parts according to each specification. (In the following table, parts marked with ★ are common with the LK3-B430E; parts with ✩ are common with the BAS-311E.)

Specification

Part name Needle hole plate

Bobbin case assy

Tension spring

Screw

Spring, antispin

Medium materials Heavy materials

(φ2.2)

S49980-001 FM

159610-201 A

154339-001 A

159612-001 A

★★

(φ2.6)

S10212-101 E

152690-301 B

S15902-401 LA

154340-001 B

S16074-101 LA

154341-001

S16492-101 LA

S15667-001 LA

With inner clamping

device

★★

(φ2.2)

S49980-001 FM

★★

159610-201 A

154339-001 A

159612-001 A154342-001 B 154342-001 B

Extra heavy

materials

(φ2.6)

S10212-101 E

152690-301 B

★

154340-001 B

★

Bobbin

Shuttle hook, W/BOX

Shuttle race body

Spring tension

Spring

159613-051

S44633-001 LAN

152685-903 A

S15662-992 LA S15663-991 LB S15662-992 LA S15663-991 LB

152682-101 A

104525-001

145519-001

152687-902 B

152686-101 B

107606-001

144588-001 B

★★★★

★★★

★★★★

152685-903 A

152682-101 A

104525-001

145519-001

★

154663-001 B

152687-902 B

152686-101 B

S06548-001 C

144588-001 B

★

LK3-B434E Mark II

16. GAUGE PARTS LIST ACCORDING TO SUBCLASSES

Specification

Part name Thread guide, needle

bar

Needle assy

Needle

Work clamp blank

Feed plate blank

Medium materials Heavy materials

With inner clamping

device

Extra heavy

materials

★★★★

S41222-101 B 152890-001 A S41222-101 B S02439-001 B

★★★✩

107415-414 S37928-419 145646-414 145646-425

★★★✩

DP × 5 #14

107415-014

434-1R

S42030-001

434-1L

S42031-001

DP × 17 NY #19

S37928-019

★★

434-2R

DP × 17 #14

145646-014

S42032-001

★★

434-2L

154256-101 A –

S42033-001

DP × 17 #25

145646-025

★

★★★

434-1

S42034-001

434-2

S42035-001

434-R1

S43459-001

–

The following are provided as optional gauge parts. Each work clamp pair is used in combination with the feed plate directly below them.

• Work clamps R, L and feed plate

R L

Work

clamp

Feed plate

1 153493-001 153498-001

103

153503-001

103

S23377-001 (519) S23378-001 (519)

S23379-001 (519)

3 S27836-001 (895) S27837-001 (895)

S27838-001 (895)

4 156085-001 (M) 156086-001 (M)

156087-001 (M)

LK3-B434E Mark II

16. GAUGE PARTS LIST ACCORDING TO SUBCLASSES

156082-001 (L) 156083-001 (L)

Work

clamp

156084-001 (L)

Feed

plate

• Gauge assy, 434E MK2

S54984-001

Home position standard plate

5.6

6 156088-001 (S) 156089-001 (S)

156090-001 (S)

• Needle hole plate

S10211-001A S51449-001AF

φ1.6

φ2.2

S40217-0013

φ6 φ3

2.8

φ1.6

S30926-001FD

φ10

φ2.2

S41013-001BZ

φ2.2

S49980-001FM

φ2.2

For medium

materials

S29997-001D

φ2.6

S30450-001H

φ2.6

4.8

S10212-101E

φ4

φ2.6

2.8

For heavy materials

S25127-001L

φ4.7

φ3.3

2.8

S30925-001ED

φ10

φ3.4

φ2.6

S34348-001MS10213-001F

φ6.5

φ4

2.8

LK3-B434E Mark II

17. TROUBLESHOOTING

Problem Cause Check Remedy Page

Work clamp does not rise.

Work clamp does not drop.

Work clamp lift amount is incorrect.

Thread wiper does not operate correctly.

Work clamp operation is sluggish.

Work clamp lift amount is too great.

Too much friction between presser plate and presser arm lever support.

Work clamp is contacting thread wiper.

Presser lifter link is not moving back.

Incorrect position of presser arm lever plate.

The thread wiper is obstructing the needle.

Thread wiper position is incorrect.

Sliding part of the work clamp lubrication

Distance between work clamp and top of needle plate

Presser plate and presser arm lever support lubrication

Thread wiper standby position

Link return spring is unhooked.

Distance between work clamp and top of needle plate

Clearance beween thread wiper and needle tip

Thread wiper position

Grease the sliging part of the work clamp.

Adjust the height of the work clamp to within 17 mm.

Grease the presser plate and presser arm lever support.

Adjust the position of the thread wiper.

Hook the link return spring properly.

Adjust the work clamp lift amount.

Adjust the height of the thread wiper.

Adjust the operating distance of the thread wiper.

Lower thread winds to one side.

Lower thread winding amount is incorrect.

Threads comes unthreaded.

Bobbin winder thread tension stud height is incorrect.

Bobbin presser position is incorrect.

Stitches being skipped at the sewing start.

Uneven upper thread length.

Upper thread is too short.

Bobbin winder thread tension stud height

Thread winding amount

Refer to “Skipped stitches occur”

Upper thread length

Thread take-up lever stroke

Adjust the height of the thread tension stud.

Adjust the position of the bobbin presser.

Refer to “Skipped stitches occer”.

Adjust the subtension.

Adjust the thread take-up lever stroke.

LK3-B434E Mark II

17. TROUBLESHOOTING

Problem Cause Check Remedy Page

Upper thread breaks.

Lower thread breaks.

Upper thread tension is too strong.

Needle is installed incorrectly.

Thread is too thick for the needle.

Thread take-up spring tension and height are incorrect.

Damaged or burred rotary hook, needle hole plate or needle.

Thread melting (synthetic thread)

Lower thread tension is too strong.

Corners of needle hole plate or bobbin care are damaged.

Upper thread tension

Needle direction

Thread and needle

Thread take-up spring tension and height

Damage or burring

Thread edge

Lower thread tension

Damage

Adjust the upper thread tension.

Install the needle so that the groove is facing forward.

Use the correct thread for the needle.

Adjust the tension and height of the thread take-up spring.

File smooth or replace the afffected part.

Use a thread cooling device (optional).

Adjust the lower thread tension.

File smooth or replace the affected part.

Skipped stitches occur.

Needle breaks.

Clearance between needle and rotary hook tip is too great.

Incorrect needle and rotary hook timing.

Driver is contacting needle more than is necessary.

Needle clearance

Needle bar lift amount

Clearance between driver and needle

Adjust the needle clearance.

Adjust the needle bar lift amount.

Adjust the driver needle guard.

Needle is bent. Bent needle Replace the needle.

Needle is installed incorrectly.

Needle direction

Needle clearance

Install the needle so that the groove is facing forward.

Adjust the needle clearance.

Needle is touching the rotary hook.

Needle bar lift amount.

Adjust the needle bar lift amount.

Needle is bent. Bent needle Replace the needle.

Needle is too thin. Needle and thread

LK3-B434E Mark II

Use the correct needle for the material.

17. TROUBLESHOOTING

Problem Cause Check Remedy Page

Upper thread is not trimmed.

Thread jamming.

Fixed knife is blunt.

Fixed knife blade

Shuttle race thread

Movable knife does

guide position

not pick up the thread.

Needle bar lift amount

The movable knife does not pick up the thread because of skipped stitches at the sewing end.

Movable knife position is incorrect.

Sub-tension is too weak.

Thread take-up spring tension and height are incorrect.

Incorrect needle and rotary hook timing.

Skipped stitches at sewing end

Movable knife position

Sub-tension

Thread take-up spring tension and height

Needle bar lift amount

Sharpen or replace the fixed knife.

Adjust the position of the shuttle race thread guide.

Adjust the needle bar lift amount.

Refer to “Skipped stitches occur”.

Adjust the position of the movable knife.

Turn the sub-tension nut to adjust the tension.

Adjust the tension and height of the thread take-up spring.

Adjust the needle bar lift amount.

Poor seam finish on reverse side of material.

Incorrect thread tightness.

Shuttle race thread guide is not separating the threads.

Upper thread is not properly tight.

Uneven upper thread length.

Upper thread is too long.

Upper thread tension is too weak.

Lower thread tension is too weak.

Thread take-up spring tension and height are incorrect.

Shuttle race thread guide position

Upper thread tension

Upper thread length

Thread take-up lever stroke

Upper thread tension

Lower thread tension

Thread take-up spring tension and height

Adjust the position of the shuttle race thread guide.

Adjust the upper thread tension.

Adjust the subtension.

Adjust the thread take-up lever stroke.

Adjust the upper thread tension.

Adjust the lower thread tension.

Adjust the tension and height of the thread take-up spring.

Inner clamping device does not operate.

Work clamp pressure is too strong.

Work clamp pressure

LK3-B434E Mark II

Adjust the work clamp pressure so that the inner clamping device operates.

18. OPTIONAL PARTS

■ Two-pedal foot switch ....................................... The presser switch and the start switch have been separated,

giving the operator more flexibility to select the best method of working.

■ Two-step foot switch ......................................... This is a pedal-type foot switch.

■ Liquid cooling tank ............................................This helps to prevent thread breakages caused by friction

when using synthetic threads. Fill the tank with silicone oil (100 mm2/s).

■ Solenoid thread wiper....................................... This wipes the thread independently of the work clamp

operation.

■ Three-pedal foot switch ....................................The switch has an independent left work clamp switch (left

(For pneumatic)

side), right work clamp switch (center) and start switch (right side).

LK3-B434E Mark II

INSTRUCTION MANUAL

BROTHER INDUSTRIES, LTD.

15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone: 81-52-824-2177

Printed in Japan

118-V34

S91V34-002

2000.06. B (1)

Brother BAS-611 Owner's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INSTRUCTIONS

CONTENTS

1. NAME OF EACH PART

2. SPECIFICATIONS

2-1. Specifications

2-2. Examples of sewing patterns

3. INSTALLATION

3-1. Power table

3-2. Installing the motor

3-3. Installing the motor pulley

3-4. Installing the control box

3-5. Installing the rubber cushions

3-6. Installing the oil pan

3-7. Installing the cushions

3-8. Installing the machine head

3-9. Installing the head rest

3-10. Installing the liquid cooling tank, optional

3-11. Installing the operation panel

3-12. Connecting the ground wire

3-13. Connecting the cords

3-14. Piping (for pneumatic)

3-14-1. Installing the air unit

3-14-2. Adjusting the speed controller

3-15. Installing the V-belt

3-16. Installing the belt cover

3-17. Installing the foot switch

3-18. Installing the motor cover

3-19. Installing the spool stand

3-20. Installing the needle sub plate

3-21. Installing the eye guard

4. LUBRICATION

4-1. Lubrication points

5. OPERATION

5-1. Name and function of each operation panel item

5-2. Operating procedure

5-2-1. Setting the program number

5-2-2. Setting the X-scale and Y-scale

5-2-3. Setting the sewing speed

5-3. Operating the foot switch

5-4. Operating the emergency stop switch

6. CHECKING THE SEWING PATTERN

7. CORRECT USE

7-1. Selecting the needle and thread

7-2. Installing the needle

7-3. Threading the upper thread

7-4. Winding the lower thread

7-5. Replacing the bobbin case and threading the thread

7-6. Sewing conditions and thread tension

7-6-1. Guide to maximum sewing speed

7-6-2. Lower thread tension

7-6-3. Upper thread tension

7-6-4. Thread take-up spring height 7-6-5. Thread take-up spring tension

7-6-6. Adjusting arm thread guide R

7-6-7. Thread take-up amount

8. SEWING

9. MAINTENANCE AND INSPECTION

9-1. Cleaning the rotary hook

9-2. Lubrication

9-3. Draining the oil

9-4. Cleaning the control box air inlet port

9-5. Cleaning the eye guard

9-6. Checking the needle

10. STANDARD ADJUSTMENTS

10-1. Adjusting the needle bar height

10-2. Adjusting the needle bar lift amount

10-3. Adjusting the driver needle guard

10-4. Adjusting the needle clearance

10-5. Adjusting the shuttle race thread guide

10-6. Adjusting the thread take-up amount

10-7. Adjusting the movable knife

10-7-1. Replacing the movable knife and fixed knife

10-7-2. Adjusting the engagement of the movable knife and fixed knife

10-8. Adjusting the work clamp lift amount

10-9. Work clamp interchangeability

10-10. Adjusting the needle up stop position

10-11. Adjusting the thread wiper