Brother LT2-B845 MKII Owner's Manual

Basic Operation Manual

BAS-300G-484 BAS-300G-484 SF

DIRECT DRIVE

PROGRAMMABLE ELECTRONIC PATTERN SEWER

<TREBLE HOOK>

Please read this manual before using the machine.

Please keep this manual within easy reach for quick reference.

This basic operation manual describes basic operations including sewing machine operations.

For cleaning, standard adjustments and more details, please refer to the instruction manual contained in the Document CD.

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.

BAS-300G-484, BAS-300G-484 SF

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

DANGER	The instructions which follow this term indicate situations where failure to follow the
	instructions will result in death or serious injury.
WARNING	The instructions which follow this term indicate situations where failure to follow the
	instructions could result in death or serious injury.
CAUTION	The instructions which follow this term indicate situations where failure to follow the
	instructions may result in minor or moderate injury.
Symbols

This symbol ( ) indicates something that you should be careful of. The picture inside the triangle indicates the nature of the caution that must be taken.

(For example, the symbol at left means “beware of injury”.)

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

This symbol ( ) indicates something that you must do. The picture inside the circle indicates the nature of the thing that must be done.

(For example, the symbol at left means “you must make the ground connection”.)

BAS-300G-484, BAS-300G-484 SF

i

[2] Notes on safety

DANGER

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

WARNING

Do not allow any liquids to get onto this sewing machine, otherwise fire, electric shocks or operating problems may occur.

If any liquid gets inside the sewing machine (machine head or control box), immediately turn off the power and disconnect the power plug from the electrical outlet, and then contact the place of purchase or a qualified technician.

CAUTION

Environmental requirements

Use the sewing machine in an area which is free from sources of strong electrical noise such as electrical line noise or static electric noise.

Sources of strong electrical noise may cause problems with correct operation.

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

The power supply capacity should be greater than the requirements for the sewing machine's power consumption.

Insufficient power supply capacity may cause problems with correct operation.

The pneumatic delivery capability should be greater than the requirements for the sewing machine's total air consumption.

Insufficient pneumatic delivery capability may cause problems with correct operation.

The ambient temperature should be within the range of 5°C to 35°C during use.

Temperatures which are lower or higher than this may cause problems with correct operation.

The relative humidity should be within the range of 45% to 85% during use, and no dew formation should occur in any devices.

Excessively dry or humid environments and dew formation may cause problems with correct operation.

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

Installation

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

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

The sewing machine weighs approximately 90 kg. The installation should be carried out by two or more people.

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

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

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

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

Install the safety covers to the machine head and motor.

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

Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into your eyes or onto your skin. If the oil and grease get into your eyes or onto your skin, inflammation can result.

Furthermore, do not drink or eat the lubricating oil or grease. They may cause diarrhea or vomiting.

Keep the oil out of the reach of children.

ii	BAS-300G-484, BAS-300G-484 SF

	CAUTION
	Sewing
	This sewing machine should only be used by	If using a work table which has casters, the casters
	operators who have received the necessary training	should be secured in such a way so that they cannot
	in safe use beforehand.	move.
	The sewing machine should not be used for any	Attach all safety devices before using the sewing
	applications other than sewing.	machine. If the machine is used without these
	Be sure to wear protective goggles when using the	devices attached, injury may result.
	machine.	Do not touch any of the moving parts or press any
	If goggles are not worn, there is the danger that if a
		objects against	the machine while	sewing,	as	this
	needle breaks, parts of the broken needle may enter
		may result in	personal injury or	damage	to	the
	your eyes and injury may result.
		machine.
	Turn off the power switch at the following times. If the
		If an error occurs in machine operation, or if abnormal
	foot switch is depressed by mistake, the sewing
		noises or smells are noticed, immediately turn off the
	machine might start operating and injury could result.
		power switch. Then contact your		nearest	Brother
	• When threading the needle
		dealer or a qualified technician.
	• When replacing the bobbin and needle
		If the machine develops a problem, contact your
	• When not using the machine and when leaving the
	machine unattended	nearest Brother dealer or a qualified technician.
	Cleaning
	Turn off the power switch before carrying out	Be sure to wear protective goggles and gloves when
	cleaning. If the foot switch is depressed by mistake,	handling the lubricating oil and grease, so that they
	the sewing machine might start operating and injury	do not get into your eyes or onto your skin. If the oil
	could result.	and grease get into your eyes or onto your skin,
		inflammation can result.
		Furthermore, do not drink or eat the lubricating oil or
		grease. They may cause diarrhea or vomiting.
		Keep the oil out of the reach of children.
	Maintenance and inspection
	Maintenance and inspection of the sewing machine	Hold the machine head with both hands when tilting it
	should only be carried out by a qualified technician.	back or returning it to its original position.
	Ask your Brother dealer or a qualified electrician to	Furthermore, do not apply excessive force when
		tilting back the machine head. The sewing machine
	carry out any maintenance and inspection of the
		may become unbalanced and fall down, and serious
	electrical system.
		injury or damage to the sewing machine may result.
	Turn off the power switch and disconnect the power
		If the power switch needs to be left on when carrying
	cord before carrying out the following operations. If
		out some adjustment, be extremely careful to observe
	the foot switch is depressed by mistake, the sewing
		all safety precautions.
	machine might start operating and injury could result.
	• Inspection, adjustment and maintenance	When replacing parts and installing optional
	• Replacing consumable parts such as the rotary	accessories, be sure to use only genuine Brother
	hook	parts.
	Disconnect the air hoses from the air supply and wait	Brother will not be held responsible for any accidents
		or problems resulting from the use of non-genuine
	for the needle on the pressure gauge to drop to “0”
		parts.
	before carrying out inspection, adjustment and repair
	of any parts which use the pneumatic equipment.	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.
		To prevent accidents and problems, do not modify
		the machine yourself.
		Brother will not be held responsible for any accidents
		or problems resulting from modifications made to the
		machine.
	BAS-300G-484, BAS-300G-484 SF					iii

[3] Warning labels

The following warning labels appear on the sewing machine.

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

1

2

3

4

5

6

*Safety devices

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

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

When operating the sewing machine, close the hook cover.

If you touch the hook while it is spinning, injury or damage to the sewing machine may result.

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

Direction of operation

iv	BAS-300G-484, BAS-300G-484 SF

Motor cover

Solenoid cover

Eye guard

Finger guard

Hook cover

Gas spring support cover

4630M

Tension release solenoid cover

Inner cover L

Outer cover

Fixed cover L

Motor cover L

Thread take-up cover

Inner cover R

Outer cover

Fixed cover R

Motor cover R

4631M

BAS-300G-484, BAS-300G-484 SF

v

CONTENTS

1. NAMES OF MAJOR PARTS ................			1
2. USEFUL FUNCTIONS FOR
OPTIMUM SEWING..............................			2
3. INSTALLATION....................................			3
3-1. Table processing diagram ................................			3
3-2. Installing the control box...................................			4
3-3. Installing the oil pan..........................................			4
3-4. Installing the machine head..............................			5
3-5. Tilting the sewing machine head ......................			9
3-6.	Installing the operation panel............................		9
3-7.	Installing the pneumatic unit .............................		10
3-8.	Adjusting the speed controller ..........................		11
3-9.	Connecting the cords........................................		12
3-10. Connecting the ground wire............................			14
3-11. Connecting the power cord.............................			15
3-12.		Installing the cotton stand...............................	15
3-13.		Installing the eye guard ..................................	16
3-14.		Installing the motor cover ...............................	17
3-15.		Lubrication ......................................................	18

5. USING THE OPERATION PANEL
	(BASIC OPERATIONS) ..................	25
5-1. Name and function of each operation
	panel item.........................................................	25
5-2. Loading sewing data.........................................		27
5-3. Setting the program number.............................		27
5-4. Setting the X-scale and Y-scale .......................		28
5-5. Setting the sewing speed..................................		28
5-6. Checking the sewing pattern ............................		29
5-7. Setting the height of the intermittent
	presser foot (-484 SF specifications only)........	30
5-8.	Notes on handling CF cards (sold separately)
	..........................................................................	31
6. SEWING ...............................................		32
6-1.	Sewing ..............................................................	32
6-2.	Using the STOP switch.....................................	33
6-3.	Using the thread wiper switch...........................	33
Document CD...........................................		34

4. PREPARATION BEFORE SEWING.....		19
4-1. Installing the needle..........................................		19
4-2. Threading the upper thread ..............................		19
4-3. Foot switch operating method ..........................		20
4-4. Winding the lower thread..................................		21
4-5.	Installing the bobbin case .................................	22
4-6.	Installing the anti-spin spring............................	22
4-7.	Thread tension..................................................	23
	4-7-1. Lower thread tension .............................	23
	4-7-2. Upper thread tension .............................	23
4-8.	Home position detection ...................................	24

BAS-300G-484, BAS-300G-484 SF

1. NAMES OF MAJOR PARTS

1. NAMES OF MAJOR PARTS

<BAS-300G-484 SF>

<BAS-300G-484>

4632M

(1)	Power switch	Safety devices:
(2)	Control box	(12)	Finger guard
(3)	CF slot	(13)	Eye guard
(4)	Operation panel	(14) Thread take-up cover
(5)	Work clamp switch	(15)	Motor cover
(6)	Start switch	(16)	Solenoid cover
(7)	STOP switch	(17)	Hook cover

(8)Thread wiper switch

(9)Pulley

(10)Cotton stand

(11)Solenoid valve

CFTM is a trademark of SanDisk Corporation.

BAS-300G-484, BAS-300G-484 SF

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2. USEFUL FUNCTIONS FOR OPTIMUM SEWING

2. USEFUL FUNCTIONS FOR OPTIMUM SEWING

Easy threading in threading mode

Page 20

When using threading mode for threading, the tension discs will open so that the thread can be threaded more easily.

Furthermore, threading mode is safe because the sewing machine will not start even when the foot switch is depressed.

Intermittent presser foot height can be set easily using the panel (-484 SF specifications only)

Page 30

INSTRUCTION MANUAL CD

5-7. Setting the height of the intermittent presser foot 6-7. Using user programs

The height of the intermittent presser foot can be set simply by entering a numeric value at the panel, without the need for tools.

Furthermore, you can use user programs to set the intermittent presser foot height to the desired height separately for each sewing program.

Easy and accurate feed plate replacement

INSTRUCTION MANUAL CD 10-12. Installing the feed plate

The feed plate installation position can be obtained accurately by using the panel, which makes feed plate replacement much easier.

4721M	Feed plate installation mode

Using the thread take-up device to prevent the thread pulling out at the sewing start

INSTRUCTION MANUAL CD

10-7. Adjusting the thread take-up amount

The upper thread trailing amount can be changed to the optimum length for the material, so that the thread can be prevented from pulling out at the sewing start.

	Less thread
Thread take-up
amount (stroke)	More thread

4722M

4723M

<Adjustment method> Loosen the pre-tension nut (1), and then turn the stopper (socket bolt) (2) to adjust the extension position of the thread take-up cylinder (3).

*If you would like to reduce the upper thread trailing amount, tighten the stopper (2).

*If you would like to increase the upper thread trailing amount, loosen the stopper (2).

2	BAS-300G-484, BAS-300G-484 SF

3. INSTALLATION

3. INSTALLATION

CAUTION

	Machine installation should only be carried out by a	All cords should be secured at least 25 mm away from
	qualified technician.	any moving parts. Furthermore, do not excessively
	Contact your Brother dealer or a qualified electrician	bend the	cords		or	secure		them too	firmly		staples,
		otherwise	there		is	the	danger that		fire or		electric
	for any electrical work that may need to be done.
		shocks could occur.
	The sewing machine head weighs approximately 90	Be sure	to	connect			the	ground.	If	the	ground
	kg. The installation should be carried out by two or
		connection	is	not		secure,		you run	a	high	risk of
	more people.
		receiving a serious electric shock, and problems with
	Do not connect the power cord until installation is	correct operation may also occur.
	complete.	Install the	safety		covers to			the machine head and
	If the foot switch is depressed by mistake, the sewing
		motor.
	machine might start operating and injury could result.

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

3-1. Table processing diagram

•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 to the left (B = 261 mm).

•Check that the control box is at least 10 mm away from the leg. If the control box and the leg are too close together, it may result in incorrect sewing machine operation.

4718M

BAS-300G-484, BAS-300G-484 SF

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3. INSTALLATION

3-2. Installing the control box

Remove the eight screws (1), and then remove the control box cover (2).

(3) Control box

(4) Bolts [4 pcs.]

(5) Plain washers [4 pcs.]

(6) Spring washers [4 pcs.]

(7) Nuts [8 pcs.]

1840B

(8) Power switch

(9) Wood screws [2 pcs.]

(10) Staples [4 pcs.]

Operator

1841B

3-3. Installing the oil pan

(1) Oil pan

(2) Nails [7 pcs.]

(3) Rubber cushions [4 pcs.]

(4) Waste oil tank

2142B

4	BAS-300G-484, BAS-300G-484 SF

3. INSTALLATION

3-4. Installing the machine head

		(1)	Pins [2 pcs.]
		(2) Set screws [2 pcs.]
		(3) Hinge rubber assemblies [2 pcs.]
		Place the machine head gently on top of
		the oil pan and the rubber cushions.
Pulse motor		NOTE:
		• Be careful not to get the cords
			clamped between the machine head
			and the oil pan.
		•	When holding the machine head, do
			not hold it by the pulse motor. This
	Approx. 20 mm		may cause problems with operation
			of the pulse motor.
Approx. 20 mm

4635M

(4) Hinge holders [2 pcs.]

(5) Bolts [4 pcs.]

(6) Plain washers [4 pcs.]

(7) Nuts [4 pcs.]

(8) Head rest

(9) Bolts with washer [4 pcs.]

4636M

BAS-300G-484, BAS-300G-484 SF

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