Brother S-7100A Instruction Manual

S-7100A	INSTRUCTION MANUAL

Please read this manual before using the machine.

Please keep this manual within easy reach for quick reference.

SINGLE NEEDLE DIRECT DRIVE STRAIGHT LOCK STITCHER WITH THREAD TRIMMER

Thank you very much for buying a BROTHER sewing machine. Before using your new machine, please read the safety instructions 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, 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.

S-7100A

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

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”.)

S-7100A

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[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 cover of the control box. Touching areas where high voltages are present can result in severe injury.

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	The ambient temperature should be within the
	from sources of strong electrical noise such as	range of 5°C to 35°C during use.
	electrical line noise or static electric noise.	Temperatures which are lower or higher than this
	Sources of strong electrical noise may cause	may cause problems with correct operation.
	problems with correct operation.	The relative humidity should be within the range of
	Any fluctuations in the power supply voltage
		45% to 85% during use, and no dew formation
	should be within ±10% of the rated voltage for the	should occur in any devices.
	machine.	Excessively dry or humid environments and dew
	Voltage fluctuations which are greater than this	formation may cause problems with correct
	may cause problems with correct operation.	operation.
	The power supply capacity should be greater than	In the event of an electrical storm, turn off the power
	the requirements for the sewing machine's power	and disconnect the power cord from the wall outlet.
	consumption.	Lightning may cause problems with correct
	Insufficient power supply capacity may cause	operation.
	problems with correct operation.

Installation

	Machine installation should only be carried out by					If using a work table which has casters, the casters
	a qualified technician.					should be secured in such a way so that they
	Contact your Brother dealer or a qualified					cannot move.
						Secure the table so that it will not move when tilting
	electrician for any electrical work that may need to
	be done.					back the machine head. If the table moves, it may
	The sewing machine weighs approximately 32 kg					crush your feet or cause other injuries.
						Use both hands to hold the machine head when
	(70lb). The installation should be carried out by
	two or more people.					tilting it back or returning it to its original position. If
	Do not connect the power cord until installation is					only one hand is used, the weight of the machine
						head may cause your hand to slip, and your hand
	complete. The machine may operate if the treadle
						may get caught.
	is depressed by mistake, which could result in
	injury.					Be sure to wear protective goggles and gloves
	Turn off	the	power	switch before inserting	or	when handling the lubricating oil and grease, so that
						they do not get into your eyes or onto your skin,
	removing	the	plug,	otherwise damage to	the
						otherwise inflammation can result.
	control box could result.
						Furthermore, do not drink the oil or eat the grease
	Be sure to connect the ground. If the ground					under any circumstances, as they can cause
	connection is not secure, you run a high risk of					vomiting and diarrhea.
	receiving a serious electric shock, and problems					Keep the oil out of the reach of children.

with correct operation may also occur.

When securing the cords, do not bend the cords excessively or fasten them too hard with staples, otherwise there is the danger that fire or electric shocks could occur.

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S-7100A

CAUTION

Sewing

	This sewing machine should only be used by		Attach all safety devices before using the sewing
	operators who have received the necessary training		machine. If the machine is used without these
	in safe use beforehand.		devices attached, injury may result.
	The sewing machine should not be used for any		Do not touch any of the moving parts or press any
	applications other than sewing.		objects against the machine while sewing, as this
	Be sure to wear protective goggles when using the		may result in personal injury or damage to the
			machine.
	machine.
			Secure the table so that it will not move when tilting
	If goggles are not worn, there is the danger that if a
	needle breaks, parts of the broken needle may enter		back the machine head. If the table moves, it may
	your eyes and injury may result.		crush your feet or cause other injuries.
	Turn off the power switch at the following times.		Use both hands to hold the machine head when
	The machine may operate if the treadle is		tilting it back or returning it to its original position. If
	depressed by mistake, which could result in injury.		only one hand is used, the weight of the machine
		When threading the needle	head may cause your hand to slip, and your hand
			may get caught.
		When replacing the bobbin and needle
	 When not using the machine and when leaving		If an error occurs in machine operation, or if
		the machine unattended	abnormal noises or smells are noticed, immediately
	If using a work table which has casters, the casters		turn off the power switch. Then contact your nearest
			Brother dealer or a qualified technician.
	should be secured in such a way so that they
	cannot move.		If the machine develops a problem, contact your
			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. The machine may operate if the treadle is	handling the lubricating oil and grease, so that they
	depressed by mistake, which could result in injury.	do not get into your eyes or onto your skin,
	Secure the table so that it will not move when tilting	otherwise inflammation can result.
		Furthermore, do not drink the oil or eat the grease
	back the machine head. If the table moves, it may
		under	any	circumstances,	as they can cause
	crush your feet or cause other injuries.
		vomiting and diarrhea.
	Use both hands to hold the machine head when	Keep the oil out of the reach of children.
	tilting it back or returning it to its original position. If
	only one hand is used, the weight of the machine
	head may cause your hand to slip, and your hand
	may get caught.
	Maintenance and inspection
	Maintenance and inspection of the sewing machine	Secure the table so that it will not move when tilting
	should only be carried out by a qualified technician.	back the machine head. If the table moves, it may
	Ask your Brother dealer or a qualified electrician to	crush your feet or cause other injuries.
	carry out any maintenance and inspection of the	Use both hands to hold the machine head when
	electrical system.	tilting it back or returning it to its original position.
	Turn off the power switch and disconnect the power	If only one hand is used, the weight of the machine
		head may cause your hand to slip, and your hand
	cord from the wall outlet at the following times,
		may get caught.
	otherwise the machine may operate if the treadle is
		When replacing parts and installing optional
	depressed by mistake, which could result in injury.
	 When carrying out inspection, adjustment and	accessories, be sure to use only genuine Brother
	maintenance	parts.
	 When replacing consumable parts such as the	Brother will not be held responsible for any
	rotary hook and knife	accidents or problems resulting from the use of
	Always be sure to turn off the power switch and then	non-genuine parts.
	wait one minute before opening the motor cover. If	If any safety devices have been removed, be
	you touch the surface of the motor, it may cause	absolutely sure to re-install them to their original
	burns.	positions and check that they operate correctly
	If the power switch needs to be left on when	before using the machine.
	carrying out some adjustment, be extremely careful	To prevent accidents and problems, do not modify
	to observe all safety precautions.	the machine yourself.
		Brother	will	not be held	responsible for any

accidents or problems resulting from modifications made to the machine.

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[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	Touching areas where high voltages are present can
	result in severe injury. Turn off the power before

opening the cover.

3

* Safety devices: (A) Finger guard	(C) Motor cover
(B) Thread take-up cover

4

5

6

7

8

Be careful not to get your hands caught when returning the machine head to its original position after it has been tilted.

Be careful to avoid injury from the moving thread take-up.

High temperature warning display

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

9

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S-7100A

Transformer box

(100 V/400 V system only)

Control box

Oil tank

0591D

S-7100A

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CONTENTS

1. MACHINE SPECIFICATIONS ..................	1
2. INSTALLATION ............................................	2
2-1. Table processing diagram.............................	3
2-2. Installation ....................................................	3
2-3. Lubrication ....................................................	6
2-4. Connecting the cords.....................................	7
2-4-1. Connecting the cords .................................	7
2-4-2. Other cords..................................................	8
3. USING THE OPERATION PANEL
(BASIC OPERATIONS).............................	12
3-1. Names and functions ....................................	12
3-2. Sewing start and end backtack stitches ......	14
3-3. Sewing continuous backtack stitches ..........	15
4. USING THE OPERATION PANEL
(ADVANCED OPERATIONS)..................	16
4-1. Switching the 4-column display ...................	16
4-2. Setting the sewing speed ..............................	16
4-2-1. Setting the maximum sewing speed.......	16
4-2-2. Setting the start backtack
sewing speed ...............................................	17
4-3. Setting the counters......................................	18
4-3-1. Lower thread counter................................	18
4-3-2. Thread trimming counter.........................	19
4-3-3. Needle replacement counter ....................	20
4-4. Setting basic functions..................................	21
4-4-1. Changing the needle stop position..........	21
4-4-2. Correction sewing.......................................	22
4-4-3. Setting thread wiping................................	23
4-5. Adjusting the needle up stop position..........	24
4-6. Resetting all settings to their defaults ........	25
5. CLEANING......................................................	26
6. REPLACING THE FIXED KNIFE
AND MOVABLE KNIFE..............................	27
7. STANDARD ADJUSTMENTS..................	28
7-1. Adjusting arm thread guide R......................	28
7-2. Adjusting the presser foot height.................	29
7-3. Adjusting of the feed dog height ..................	30
7-4. Adjusting the feed dog angle ........................	30
7-5. Adjusting the needle bar height...................	31
7-6. Adjusting the needle and feed
mechanism timing ........................................	31
7-7. Adjusting the needle and rotary hook
timing.............................................................	32

7-8. Adjusting the rotary hook lubrication
amount ..........................................................	33

8. TROUBLESHOOTING................................		34
8-1.	Sewing ...........................................................	34
8-2.	Error code displays .......................................	38
9. 7-SEGMENT DISPLAY...............................		42

S-7100A

S-7100A

1. MACHINE SPECIFICATIONS

1. MACHINE SPECIFICATIONS

	3	4
Quick reverse	○	○
Thread wiper		○

0989D

		3		3A		5
Use		For light to		For medium-weight		For heavy-weight
		medium-weight materials		materials		materials
Max. sewing speed		5,000 sti/min		4,000 sti/min
Sewing speed at the time of shipment				4,000 sti/min
Start backtacking and continuous				220 - 3,000 sti/min
backtacking speed
End backtacking speed				1,800 sti/min
Max. stitch length		4.2 mm		5 mm
Presser foot height	Lifting lever			6 mm
	Knee lifter			13 mm
Feed dog height		0.8 mm		1.0 mm		1.2 mm
Needle (DB x 1, DP x 5)			#11 - #18			#19 - #22
Motor			AC servo motor (4-pole, 450 W)
Control circuit				Microprocessor

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S-7100A

2. INSTALLATION

2. INSTALLATION

CAUTION

	Machine installation should only be carried out by a	Secure the table so that it will not move when tilting
	qualified technician.	back the machine head. If the table moves, it may
	Contact your Brother dealer or a qualified electrician	crush your feet or cause other injuries.
	for any electrical work that may need to be done.	Use both hands to hold the machine head when
	The sewing machine weighs approximately 32 kg	tilting it back or returning it to its original position. If
		only one hand is used, the weight of the machine
	(70lb). The installation should be carried out by two
		head may cause your hand to slip, and your hand
	or more people.
		may get caught.
	Do not connect the power cord until installation is
	complete. The machine may operate if the treadle is
	depressed by mistake, which could result in injury.

About the machine set-up location

Do not set up this sewing machine near other equipment such as televisions, radios or cordless telephones, otherwise such equipment may be affected by electronic interference from the sewing machine.

The sewing machine should be plugged directly into an AC wall outlet. Operation problems may result if extension cords are used.

0475D

Carrying the machine

The sewing machine should be carried by the arm and the motor cover by two people as shown in the illustration.

*Do not hold by any part other than the motor cover. If this is not observed, it may result in damage to the sewing machine.

0476D

Tilting back the machine head

Hold section (A) with your foot so that the table does not move, and then push the arm with both hands to tilt back the machine head.

2101B

Returning the machine head to the upright position

1.Clear away any tools, etc. which may be near the table holes.

2.While holding the face plate with your left hand, gently return the machine head to the upright position with your right hand.

2089M

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2. INSTALLATION

2-1. Table processing diagram

The top of the table should be 40 mm in thickness and should be strong enough to hold the weight and with-stand the vibration of the sewing machine.

Drill holes as indicated in the illustration below.

Head rest hole

Cotton stand hole

Cord hole

Control box mounting hole

0592D

2-2. Installation

1. Control box + Oil pan

(1) Control box

(2) Bolts [4 pcs]

(3) Nuts [4 pcs]

(4) Spring washers [4 pcs]

(5) Washers [4 pcs]

2. Connecting rod

(6) Connecting rod

(7) Nut

0478D

3

S-7100A

2. INSTALLATION

3. Rubber cushions

(1)Rubber cushions [2 pcs]

(2)Nails [4 pcs]

(3)Head cushions (left) [2 pcs]

(4)Head cushions (right) [2 pcs]

0479D

4. Machine head

(1)Hinges [2 pcs]

(2)Machine head

(3)Head rest

NOTE:

Bind the cords together and pass them through the cord hole

Tap the head rest (3) securely into the table hole. If the head rest (3) is not pushed in as far as it will go, the machine head will not be sufficiently stable when it is tilted back.

0480D

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2. INSTALLATION

0481D 5. Knee lifter plate

<Knee lifter adjustment>

1. Turn the machine pulley so that the feed dog is below the top of the needle plate.

2. Lower the presser foot (1) by using the lifting lever (2).

3. Loosen the nut (3).

4. Turn the screw (5) to adjust so that the amount of play in the knee lifter is approximately 2 mm when the knee lifter plate (4) is gently pressed.

5. Securely tighten the nut (3).

6. Loosen the nut (6).

7. Turn the adjusting screw (8) to adjust so that the presser foot (7) is at the desired position within a distance of 13 mm of the needle plate when the knee liter plate is fully pressed.

8. After adjustment is completed, securely tighten the nut

(6).

Within 13 mm

0482D

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S-7100A

2. INSTALLATION

2-3. Lubrication

CAUTION

Do not connect the power cord until lubrication has been completed, otherwise the machine may operate if the treadle is depressed by mistake, which could result in injury.

Be sure to wear protective goggles and gloves when handling the lubricating oil, so that it does not get into your eyes or onto your skin.

If care is not taken, inflammation can result. Furthermore, do not drink the lubricating oil. Diarrhea or vomiting may result.

Keep the oil out of the reach of children.

When cutting the nozzle of the oil tank, hold the base of the nozzle securely.

If you hold the end of the nozzle, injury from the scissors may result.

The sewing machine should always be lubricated and the oil supply replenished before it is used for the first time, and also after long periods of non-use.

1. Hold the base of the nozzle of the accessory oil tank (1), and use scissors to cut about half-way along the straight section (A) of the nozzle.

2. Loosen and remove the nozzle, and then remove the seal

(2).

3. Tighten the nozzle.

4. Tilt back the machine head.

5. Remove the rubber cap (3), and pour lubricating oil into the oil tank (4) until it reaches the upper reference line (5). (Approx. 150 ml)

6. Replace the rubber cap (3).

7. Return the machine head to its original position.

NOTE:

When the machine head is tilted back at times such as the following, lubricating oil may leak out from the oil pan (6). 1) If the machine head is tilted back immediately after

sewing;

2) If the machine head is tilted back a long way when the head rest has been removed;

3) If lubricating oil is added until the oil level goes above the upper reference line (5) on the oil tank (4).

<Lubrication oil replenishment interval>

If the oil level drops below the lower reference line (7) on the oil tank (4), be sure to replenish the oil.

0483D

S-7100A

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