Brother MD-6020, MD-6120 Instruction Manual

	MD-6020	-fi,EijljtP.,ij~
		INSTRUCTION MANUAL
	Single-phase power specifications	MANUAL DE INSTRUCCIONES
	$4SEI!illl.
	Especiflcaciones de alimentaci6n de fase unica
	MD-6120
	Three-phase power specifications
	:4SEI!iill~
	Especificacion~s de alimentaci6n de tres fases

AC SERVOMOTOR

Please read this instruction manual before using the machine.

Please keep this instruction manual within easy reach for quick reference.

SERVOMOTOR DE AC

Por favor lea este manual de instrucciones antes de usar Ia maquina.

Por favor guarde este manual de instrucciones al alcance de Ia mano para una rapida referencia.

From the library of: Superior Sewing Machine & Supply LLC

AC SERVOMOTOR

MD-6020 MD-6120

Single-phase power specifications

Three-phase power specifications

CONTENTS

SAFETY INSTRUCTIONS ................................
1. SAFETY INDICATIONS AND THEIR
	MEANINGS ...................................................
2. CAUTIONS WITH REGARD TO
	SAFETY..........................................................		ii
3.	WARNING I..ABEL ........................................		ii
1. SPECIFICATIONS .........................................
2.	UNDERSTANDING THE RATING PLATE ......		1
3.	INSTALI..ATION .............................................		2
	3-1. Installing the motor to the work
	table.........................................................		2
	3-2. Attaching the belt...................................		2
	3-3. Installing the belt cover.........................		3
	3-4. Connecting the connecting rod ............		3
	3-5. Adjusting the belt cover safety
	mechanisms ............................................		3
	3-5-1.	Adjusting the belt casting
		prevention guide.........................	3
	3-5-2.	Adjusting the finger guard.........	3
	3-6. Connecting the cords.............................		4
	3-6-1.	Connecting the power cord,
		power switch and ground
		cord...............................................	4
	3-6-2.	Connecting the sewing machine
		and control box ...........................	4,5
	3-7. Installing the head lamp........................		6
	3·8. Connecting the external operation
	panel........................................................		6
4. ADJUSTING THE TREADLE UNIT ..........			7
	4-1. Operating the treadle.............................		7
	4-1-1. For treadles with one forward
		and one rear stage......................	7
	4-1-2. For treadles with two forward
		and two rear stages....................	7

4-2.	Adjusting the treadle .............................			8
	4-2-1.	Adjusting the treadle pressure		.. 8
	4-2-2.	Adjusting the treadle return
		pressure.......................................		8
	4-2-3.	Adjusting the treadle stroke ......		8
4-3. When using the automatic presser foot
	lifter device .............................................			8
5. USING THE CONTROL BOX ....................				9
5-1. Power switch and power indicator.......				9
5-2.	Setting the sewing speed ......................			9
5-3. Control box DIP switch setting
	procedure................................................			9
5-4.	Description of functions ........................			10
	5-4-1.	Backtacking function using
		the control box when no
		operation panel is installed .......		10
	5-4-2.	Other DIP switch functions ........		11
5-5.	Periodic checks .......................................			11
6. CONNECTING OPTIONS			...........................	12
6-1. Connecting the pedal for standing				12
	operations ...............................		................
6-2. Connecting the material edge sensor .. 13
7. TROUBLESHOOTING .................................				14
7-1.	Error display and their meanings .........			14
8. USING THE OPERATION PANEL F-40 ...				15
8-1. Changing the machine head
	settings .........................		·...........................	15
	8-1-1. Setting procedure .......................			15
	8-1-2.	Initializing the machine head
		setting value ................................		15
	8-1-3.	Machine head setting mode
		list .............................................		15,16
	8-1-4.	Other machine sewing
		speeds ..........................................		16
8-2. Setting the sewing speed to match				17
	the machine head ...................................

From the library of: SuperiorMD-6020,Sewing6120 Machine & Supply LLC

Thank you for purchasing this Brother general-purpose sewing machine motor. Before using the motor, please be sure to read the Safety Instructions and the explanations of how to use the motor which are contained in this manual.

Furthermore, because we are continually improving our products as a result of continuing research, the specifications for the product which you have purchased may differ slightly from those listed in this manual.

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

A WARNING	Failure to observe the instruction which appears after this indication while using the motor
	will result in death or severe injury to the user.
A CAUTION	Failure to observe the instructions which appear after this indication while using the motor
	may result in slight to moderate injury to the user, or physical damage.

Symbols

The symbols which are used in this manual and their meanings are shown below.

~This symbol is used to indicate the danger of ~lectric shocks.

Lh	This symbol is used to indicate general cautions that should be observed.

•This symbol is used to indicate that the ground connection must be made.

0	This symbol is used to indicate general actions which you must do.

2. CAUTIONS WITH REGARD TO SAFETY

Following is a compilation of all the warnings and cautions which appear throughout this manual.

A WARNING

A Wait at least 5 minutes after turning off the power switch before opening the cover of the control box. Touching areas ~ where high voltages are present can result in severe injury.

A CAUTION

~

Lll

0

Do not use the motor near sources of strong electrical interference. If the motor is installed in a location which is close to sources of strong electrical interference such as high-frequency welders, it may cause problems with correct operation of the sewing machine.

Disconnect the power cord plug from the wall outlet before installing the motor.

The motor and control box weigh approximately 12 kg. Take care not to drop them on your feet when installing or removing them from the work table.

Be sure to tighten the nuts securely.

If they are not tightened properly, it could cause the sewing machine to vibrate or shift its position while sewing.

From the library of: SuperiorMDSewing-6020, 6120 Machine & Supply LLC

A CAUTION

0

0

•

Turn off the power switch and wait for the power indicator on the panel display to turn off before connecting and disconnecting any of the connectors.

Turn off the power switch before inserting or removing the AC power cord plug.

Be sure to connect the power supply to a secure ground. If the ground is not securely connected, electric shocks may result.

0	Use a lamp which is rated at 6 V AC and 20 W or less as the head lamp.
	If a lamp with a higher rating than this is used, it could cause the lamp wires and the transformer to overheat and burn
	out.

0

~

0

0

0

0

0

Confirm that the power supply matches the motor and the control box specifications before turning on the power switch. The motor, control box or sewing machine could be damaged if the supply voltage is too high.

Do not clamp the cords inside the control box when closing the control box cover.

Turn off the power switch before connecting the cords, otherwise damage to the control box, synchronizer, operation panel or material edge sensor may result.

Any fluctuations in the power supply voltage should be within ±1 0% of the rated voltage for the motor.

Voltage fluctuations which are greater than this may cause problems with correct operation of the sewing machine.

Use a power supply with a capacity which is in excess of the motor power capacity.

Insufficient power supply capacity may cause problems with correct operation of the sewing machine.

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

Temperatures which are lower or higher than this may cause problems with correct operation of the sewing machine.

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 of the sewing machine.

0

0

Avoid exposure to direct sunlight during use.

Exposure to direct sunlight may cause problems with correct operation of the sewing machine.

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 of the sewing machine.

3. WARNING LABEL

The warning label shown below is affixed to the cover of the control box. Please follow the instructions on the label at all times when using the motor. If the label has been removed or is difficult to read, please contact your nearest Brother dealer.

			A DANGER AGEFAHR		A DANGER	A PELIGRO
			Hazardous voltage	Hochspannung	Un voltage non adapte	Un voltaje inadecuado
			will cause injury.	verletzungsgefaM	provoque des blessures.	puede provocar las
			Tum off main	Bitte schalten sie den	Eteindrel'interrupteuret	heridas.
						Apagar el interrupter
			switch and wait 5	hauptschalter ailS und	attendre 5minutes
			minutes before	warten sie 5minuten,	avantd'ouvrir le capot	principal yesperar 5
			opening this cover.	bevor sie diese		minutos antes de abrir
				abdeckung offnen.		esta cubierta.

Warning label --- . /

From the library of: Superior Sewing Machine & Supply LLC	ii
MD-6020, 6120

1.SPECIFICATIONS

2.UNDERSTANDING THE RATING PLATE

1.SPECIFICATIONS

p~

Single-phase 110 V,

Single-phase 220 V/230 V/240 V/

3-phase 220 V,

50/60Hz

I

CE-compliant 230 V, 50/60Hz

50/60Hz

MD-6020

MD-6120

Model

M-60C

Type

Induction motor

Motor

Rated output

400W

Rated speed

1

3,500 min·

Insulation class

Type E

Voltage

110 v

I

220 V/230 V/240 VICE-compliant 230 V

220 v

Speed control range

Up to 5,000 rpm (Overlocking: Max. 8,500 rpm)

(machine shaft)

Solenoid resistance

10 Q or more

Control

Allowable voltage fluctuation

±10%

box

Operating temperature

5°C- 35°C

Operating humidity

45% - 80% R.H. (no condensation)

Storage temperature/humidity

-20°C - 60°C, 25% - 90% R.H.

Weight

12 kg (Main unit)

Dimensions

343 (W) x 324 (H) x 195 (D) mm (Main unit)

2. UNDERSTANDING THE RATING PLATE

Example: Control box (Single-phase 220 V specifications)

brother	OUT PUT			400 W
	SINGLE PHASE
MD-6020		VOLTS	rnQJ 230 240
184-4239-BO		HERTZ		50/60
CONTROL BOX		FOR		M-60C
NO. 0029A 1101		BROTHER INDUSTRIES, LTD
				MADE IN JAPAN

Example: Motor (Single-phase 220 V

specifications)

		brother	R.P.M		3500
			OUT PUT		400 W
		M-60C	SUPPLIED FROM CONTROL BOX
		AC SERVO MOTOR
			MD-6020/6120
		NO. 0029A 1101	BROTHER INDUSTRIES, LTD
				MADE IN JAPAN

							Phase	Voltage (V)		Phase display	Voltage display method
Product code explanation							Single	110		SINGLE			110
							Single	220		SINGLE	12201	230	240
							Single	230		SINGLE	220	12301	240
MD - 6020!------,
							Single	CE-compliant 230		SINGLE			230
DD-~DDD-?D							Single	240		SINGLE	220	230	~
							Three	220		THREE			220

,,

Applicable machine heads

Power supply

Maximum machine

Single-needle

Pulley

Twin-needle

Pulley

6020

Single-phase

head speed

1

7370

cp

75

B

8420

cp 77

6120

Three-phase

1

(850 rpm) 1000 rpm

2

2010

cp

75

c

8770

cp 77

2

2,000 rpm

3

2,200 rpm

3

7220

cp

75

D

C51 0

cp 102

4

2,400 rpm

4

7240

cp

75

E

P73 0/P81 0

cp 80

5

2,500 rpm

5

7480

cp 75

K

8720

cp 77

6

7910

cp

75

L

845 01875 0

cp 77

6

2,600 rpm

forward step, one

7

3,000 rpm

7

798 On28 0

cp

75

M

8470

cp 77

One

backward step

8

3,500 rpm

8

852 0/853 0/

cp

77

N

8480

cp 77

Two forward steps, two

9

4,000 rpm

8540

p

8370

cp 77

4

backward steps

A

4,500 rpm

9

8830

cp 77

R

8780

cp 77

One forward step, one

B

5,000 rpm

A

Overlocker

cp

55

7

backward step

C

5,500 rpm

F

7740

cp

75

With standing pedal plug

D

6,000 rpm

G

7720

cp

75

Two forward steps, two

E

6,500 rpm

H

7780

cp 75

A

backward steps

F

7,000 rpm

Motor pulley; cp

105

Motor pulley; cp

90

With standing pedal plug

G

7,500 rpm

*

Each pulley size indicates the measured size from the outside of the belt when the belt

H

8,000 rpm

is attached to the pulley.

*

Contact Brother if using the motor with any machine heads not mentioned above.

J

8,500 rpm

1

From the library of: Superior Sewing Machine & Supply

LLC

M0-6020, 6120

	3. INSTALLATION
3. INSTALLATION
	A CAUTION
0	Do not use the motor near sources of strong electrical interference. If the motor is installed in a location which
	is close to sources of strong electrical interference such as high-frequency welders, it may cause problems with
0	correct operation of the sewing machine.
	Disconnect the power cord plug from the wall outlet before installing the motor.

£ The motor and control box weigh approximately 12 kg. Take care not to drop them on your feet when installing ~ them to the work table.

0	Be sure to tighten the nuts securely.
	If they are not tightened properly, it could cause the sewing machine to vibrate or shift its position while sewing.

3-1. Installing the motor to the work table

3-418.5

..

159

1.Insert the bolts f) into the holes in the work table 8 and then secure the motor 8 to the work table 8 by tightening the motor mounting brackets 8 to the work table 8 with the flat washers 8, spring washers 0 and nuts 0 as shown in the illustration.

2.The positions of the work table 8 holes are shown in the illustration.

3-2. Attaching the belt

1. Tilt back the machine head and place the belt 8 onto the motor pulley f) and the machine pulley 8.

2. Turn the two nuts 8 to adjust the deflection in the V- belt 8 when the center of the belt is pushed.

The recommended values are:

1. For single-needle sewing machines and overlock machines, the deflection should be 10-14 mm when the belt is pushed with a force of 5 N (500 g).

2. For twin needle sewing machines, the deflection should be 1020 mm when the belt is pushed with a force of 10 N (1 kg).

Note:

While using the sewing machine, the belt will conform to the pulley and cause the belt tension to loosen. If the belt tension is too loose, the following problems can occur.

1. The stopping position may shift.

2. An abnormal noise may be heard due to belt slippage.

3. The belt may become too loose and contact the cover.

4. When sewing heavy materials, the belt may slip on the pulley and the sewing machine may stop.

From the library of: Superior Sewing Machine & Supply LLC	2
MD-6020, 6120

Mark for 80 mmdiameter pulley

3. INSTALLATION

3-3. Installing the belt cover

1. Secure the belt cover 0 to the motor 8 with the two screws f) as shown in the illustration. At this time, position the belt cover 0 so that it does not touch the belt.

2. A belt casting prevention guide and finger guide are

provided on the belt cover. Refer to "3-5. Adjusting the belt cover safety mechanisms" on this page.

3-4. Connecting the connecting rod

• Pass the connecting rod joint 0 through hole A in the treadle lever f), and tighten it with the spring washer 8and nut8.

• Adjust the position of the machine treadle plate so that the connecting rod is perpendicular to the treadle plate. Note:

The treadle pressure is adjusted to the position of hole A at the time of shipment from the factory. Refer to "4. Adjusting the treadle unit" on page 7.

3-5. Adjusting the belt cover safety mechanisms

Forward rotation

Mark for 105 mmdiameter pulley

Mark for 90 mmdiameter pulley

Mark for 80 mm

diameter pulley Mark or

9~ mmMark for 105 mm-

deameter diameter pulley pulley

Reverse rotation (Overlock machines)

3·5-1. Adjusting the belt casting prevention guide

1.Loosen the screw 0.

2.A mark showing the pulley size is stamped on the belt cover. (The available inner diameters are 90 mm, 105

mm and 80 mm.)

Adjust the position of the belt casting prevention cover f) in accordance with the pulley size. Align the projection position with the mark. (For 80 mm diameter pulleys, install the belt casting prevention cover f) in the reverse direction.)

3.After adjusting, tighten the screw 0. Note:

This safety guide will prevent the belt from coming off even when the machine head is tilted back.

3-5-2. Adjusting the finger guard

1.Loosen the screw 8.

2.Install the finger guard so that it is on the belt winding side.

3.A mark showing the pulley size is stamped on the belt cover. (The available inner diameters are 80 mm, 90 mm and 105 mm.)

Adjust the position of the finger guard 8 in accordance with the pulley size. Align the center of the screw with the mark.

4.After adjusting, tighten the screw 8. Note:

The finger guard is a safety mechanism that prevents

fingers from being caught in the belt.

Change the position of the finger guard 8 to match the direction of rotation of the motor pulley.

3	From the library of: Superior Sewing Machine & Supply LLC
	MD-6020, 6120

3. INSTALLATION

3-6. Connecting the cords

		A CAUTION
	0	Turn off the power switch and wait for the power indicator on the panel display to turn off before connecting
		and disconnecting any of the connectors.
	0 Turn off the power switch before inserting or removing the AC power cord plug.
		Be sure to connect the power supply to a secure ground. If the ground is not securely connected, electric shocks
3-•6-1. Connectingmay result.the power cord, power switch and ground cord
		u

Mounting bracket grounding screw

Ground

Green/yellow

Sewing machine oil pan

3-6-2. Connecting the sewing machine and control box

12-pin plug

6-pin plug

	t
• Loosen the two screws 0, and then gently pull the	0 Synchronizer coi
cover 8 toward you to open it.

•Connect the 12-pin plug and the 6-pin plug.

•Close the cover 8 {be careful not to clamp the cord) and tighten the two screws 0.

•Connect the synchronizer cord 8.

From the library of: Superior Sewing Machine & Supply LLC	4
MD-6020, 6120

							3. INSTALLATION
3-7. Installing the head lamp
			A CAUTION
0			Use a lamp which is rated at 6 V AC and 20 W or less as the head lamp.
			If a lamp with a higher rating than this is used, it could cause the lamp wires and the transformer to overheat
			and burn out.
						1. Open the control box cover 0. (Refer to page 4.)
						2.	Loosen the screws 0 of the terminal block 8, insert the
							lamp cords 0 into the clamps 8 as far as they will go,
							and then tighten the screws 0.
							Note:
							Do not tighten the screws 0 too tightly, as this may
							damage the terminal block 8.
						3.	Pass the lamp cords 0 through the rubber plug 0.
							Refer to the illustration of the rubber plug 0 in "3-8.
							Connecting the external operation panel" at below-left
							on this page at this time.
						4.	Close the control box cover 0.

3-8. Connecting the external operation panel

	For external
For option	operation panel

1. The F-20, F-40 and F-1 00 operation panels can be used.

2.Disconnect the synchronizer cord 0.

3.Loosen the screw 8, and then gently pull the cover 0 toward you to open it.

4.After opening the pawl of the circuit board connector 8, align the 'Y mark on the operation panel connector

0 with the 'Y mark on the circuit board connector 8, and securely insert operation panel connector 0 until the pawl locks.

5.Fit the rubber plug 0 onto the operation panel cord 8 as shown in the illustration, and then install the con-

trol box while being careful not to damage the cord 8. (Break the membrane of the rubber plug 0.)

6.Close the cover 0 and secure it with the screw 8. Be careful not to clamp any of the cords with the cover.

7.Connect the synchronizer cord 0.

Note:

When an external operation panel is installed, the backtacking function of the control circuit board will be disabled, so use the external operation panel to carry out backtacking.

From the library of: Superior Sewing Machine & Supply LLC	6
MD-6020, 6120

4.ADJUSTING THE TREADLE UNIT

4.ADJUSTING THE TREADLE UNIT

4-1. Operating the treadle

•There are two types of treadles, one with one forward and one rear stage and one with two forward and two rear stages. These are provided according to the destination of the machine.

4-1-1. For treadles with one forward and one rear stage

1. The treadle is at the neutral position 0

					when the treadle is not pressed.
					2. When the treadle is gently depressed
					to position f), low-speed sewing is car-
					ried out. If it is then depressed as far
					as e, high-speed sewing is carried out.
					3. When the treadle is pressed forward
					and then back to the neutral position
					0, the needle will stop below the
					needle plate (when needle down stop
					mode has been set).
		Thread trimming
			treadle is pressed backward to position 8 and
4.		When the treadle is depressed backwards to position 8 (or when the
		is then returned to neutral position 0), the thread trimmer operates, and then the needle will be raised and stop
		above the needle plate.
5. If using with the synchronizer cord disconnected
	•	When the treadle is pressed forward and then back to the neutral position 0, the machine will stop regardless of
		the needle position.
	•	Thread trimming will not be carried out even if the treadle is pressed backed to position 8. (The sewing machine
		does not operate.)
6.		If an automatic presser foot lifter is being used

•The presser foot will rise when the treadle is pressed backwards. If the knee switch is pressed, the pressure foot will not raise with the treadle operation, so raise and lower the presser foot with the knee switch.

•When the treadle is pressed backwards and the thread is trimmed, the sewing machine will stop, and the presser foot will rise. To lower the presser foot, press the treadle backwards and then return it to the neutral position 0. The presser foot can also be lowered using the knee switch. If the treadle is pressed forward, the sewing machine will

operate after the presser foot lowers. Note:

The presser foot can be raised and lowered by returning the treadle only from when the power switch is turned on to when the knee switch is operated.

4-1-2. For treadles with two forward and two rear stages

1. The treadle is at the neutral position 0 when the treadle is not pressed.

2. When the treadle is gently depressed to position f), low-speed sewing is carried out. If it is then depressed as far as e, high-speed sewing is carried out.

3. When the treadle is pressed forward and then back to the neutral position 0, the needle will stop below the needle plate (when needle down stop mode has been set).

		Thread trimming
4.		When the treadle is depressed backwards to position 8 (or when the	treadle is pressed backward to position 8 and
		is then returned to neutral position 0), the thread trimmer operates, and then the needle will be raised and stop
		above the needle plate.
5. If using with the synchronizer cord disconnected
•		When the needle is pressed forward and then back to the neutral position 0, the machine will stop regardless of
		the needle position.
•		Thread trimming will not be carried out even if the treadle is pressed backed to position 8. (The sewing machine
		does not operate.)
6. If an automatic presser foot lifter is being used
•		The presser foot will rise when the treadle is gently pressed back to the backward position 8.
•		The presser foot will lower when the treadle is returned to the neutral position 0.
•		The presser foot will lower if the treadle is gently pressed to the position 0 while the presser foot is raised.

7	From the library of: Superior Sewing Machine & Supply LLC
	MD-6020, 6120

4. ADJUSTING THE TREADLE UNIT

4-2. Adjusting the treadle

A CAUTION

o Turn off the power switch before starting work, otherwise the motor may operate, which could result in injury.

4-2-1. Adjusting the treadle pressure

• If the machine starts running at a low speed when your foot is simply resting on the treadle, or if the treadle pressure is too weak, adjust the position {a to c) at

Fig A Fig 8 which the treadle spring 0 is hooked onto the treadle lever&.

Note:

The treadle pressure will increase from position a to position c.

4-2-2. Adjusting the treadle return pressure

• Loosen the nut 8 and turn the bolt 8. The treadle return pressure becomes heavier as the bolt 8 is tightened, and becomes lighter as the bolt 8 is loosened.

4-2-3. Adjusting the treadle stroke

•Remove the nut 0, and then move the connecting rod joint 0 from the position in figure A to the position in figure B. The treadle stroke will increase by approx. 1.25 times.

Note:

This adjustment will also affect the treadle pressure and the treadle return pressure, so these settings should be readjusted if necessary.

		4-3. When using the automatic presser foot
			lifter device
		1. When the treadle is depressed to position 8, the
			presser foot is raised.
		2. If you would like the treadle pressure to be lighter when
			it is depressed forward from the 2nd step to the 1st
			step, change the position of the spring from ®to @.
Treadle unit			If you would like the pedal return to be from the 2nd
			step to the 1st step at this time, change the spring po-
			sition from © to @.
		•	When changing the spring positions from® to® and
			from© to@, you must remove the three screws@ of
			the treadle unit and disconnect the treadle unit from the
			control box before changing the spring positions.
		3. After making the setting in 2., depress the treadle back-
			ward again to position 8. If you would like to have
			some modulation in the treadle at this time, move the
			spring from @ back to ©.
			If you would like some modulation in the treadle at po-
			sitions 0 and 8, move the spring from ® back to ®.
		•	When changing the spring position from @to ©, you
			can do it by using a narrow screwdriver or similar tool
			to push spring® in as far as it will go.
			In the same way, when changing the spring position
			from ®to ®, you can do it by pushing spring @ in as
			far as it will go.

From the library of: Superior Sewing Machine & Supply LLC	8
MD-6020, 6120

5.USING THE CONTROL BOX

5.USING THE CONTROL BOX

		A CAUTION
0		Confirm that the power supply matches the motor and the control box specifications before turning on the
		power switch. The motor, control box or sewing machine could be damaged if the supply voltage is too high.
			5-1. Power switch and power indicator
			•	When the power ON switch 0 is pressed, the power
				indicator (green) 0 lights and the power turns on.
			•	When the power OFF switch 8 is pressed, the power
				indicator (green) 0 turns off and the power switches
				off.

5-2. Setting the sewing speed

• Turn the speed adjustment knob 8 on the front of the control box clockwise to increase the sewing machine speed (the speed corresponding to the treadle depression amount), and turn it counterclockwise to reduce the speed.

• The maximum sewing speed that can be set is the sewing speed which is determined by DIP switch settings. Refer to "5-4-2-1 DIP switch 1 functions" on page 11. The minimum sewing speed is the sewing speed when the treadle is at the low-speed sewing position.

Power indicator

5-3. Control box DIP switch setting procedure

A WARNING

/A. Wait at least 5 minutes after turning off the power switch before opening the cover of the control box. Touching ~ areas where high voltages are present can result in severe injury.

A CAUTION

~ Do not clamp the cords inside the control box when closing the control box cover.

• Make sure that the DIP switches are set correctly, otherwise incorrect operation may result.

• Disconnect the synchronizer cord 0.

• Loosen the two screws 8, and then gently pull the cover 0 toward you to open it.

• Set the DIP switches.

Refer to the tables on pages 10 and 11 for details of DIP switch functions.

• Close the cover 0 (be careful not to clamp the cord) and tighten the two screws 8.

• Connect the synchronizer cord 0.

9	From the library of: SuperiorMD-Sewing6020, 6120 Machine & Supply LLC

5. USING THE CONTROL BOX

5-4. Description of functions

5-4-1. Backtacking function using the control box when no operation panel is installed

				5-4-1-1. Start backtacking function
				When the start backtack key 0 is pressed, the start backtack
				LED 0 lights and start backtacking can be carried out.
				When the start backtack key 0 is pressed once more, the
				start backtack LED 0 switches off and start backtacking can
				no longer be carried out.
				The start backtack key 0 can only be used to turn start
				backtacking on and off after thread trimming is complete.
				5-4-1-2. End backtacking function
				When the end backtack key fJ is pressed, the end backtack
				LED 8 lights and end backtacking can be carried out.
				When the end backtack key fJ is pressed once more, the
				end backtack LED 8 switches off and end backtacking can
				no longer be carried out.
		End backtack key		The end backtack key fJ can be used to turn end
				backtacking on and off at any time.
5-4-1-3. Setting the number of backtack stitches
				Control circuit board DIP switches
		I a /

AI/

~/

Display

IAI

1

8 1

lei

IDI

DIPSW No.

SW3

SW2

No. of stitches

1

2

3

4

5

6

1

2

3

4

5

6

2

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

3

ON

OFF

OFF

ON

OFF

OFF

ON

OFF

OFF

ON

OFF

OFF

4

OFF

ON

OFF

OFF

ON

OFF

OFF

ON

OFF

OFF

ON

OFF

5

ON

ON

OFF

ON

ON

OFF

ON

ON

OFF

ON

ON

OFF

6

OFF

OFF

ON

OFF

OFF

ON

OFF

OFF

ON

OFF

OFF

ON

7

ON

OFF

ON

ON

OFF

ON

ON

OFF

ON

ON

OFF

ON

8

OFF

ON

ON

OFF

ON

ON

OFF

ON

ON

OFF

ON

ON

9

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

ON

•Setting the number of start backtack stitches

Use switches 8 of DIP switch 3 to set the number of start backtacking stitches A. Use switches 0 of DIP switch 3 to set the number of start backtacking stitches B.

•Setting the number of end backtack stitches

Use switches 8 of DIP switch 2 to set the number of end backtacking stitches C. Use switches 0 of DIP switch 2 to set the number of end backtacking stitches D. Note:

At the time of shipment from the factory, DIP switches A, B, C and Dare all set to OFF. As a result, the number of stitches is set to 2 for each of A, 8, C and D.

When using an operation panel, backtacking functions using the control box are all disabled.

From the library of: Superior Sewing Machine & Supply LLC	10
MD-6020, 6120

5. USING THE CONTROL BOX

5-4-2. Other DIP switch functions 5-4-2-1. DIP switch 1 0 functions

ON

Presser foot is lowered when treadle is returned to neutral position immediately after thread trimming. (Export specifications)

SW1-1

f

---------------------------------------------------------

OFF

Presser foot is raised when treadle is returned to neutral position immediately after thread trimming. (Domestic Japan specifications)

SW1-2

ON

Motor pulley diameter 90 mm

f ---

---------------------------------------------------------

OFF

Motor pulley diameter 105 mm

SW1-3

ON

Automatic presser foot lifter device used

f ---

---------------------------------------------------------

OFF

Automatic presser foot lifter device not used

ON

Stopping position when treadle is at neutral is needle up stop position.

SW1-4

OFF

---------------------------------------------------------

Stopping position when treadle is at neutral is needle down stop position.

SW1-5

ON

Twin needle

---

OFF

---------------------------------------------------------

Single needle

SW1-6

ON

Limit speed setting 1

OFF

---------------------------------------------------------

SW1-7

ON

Limit speed setting 2

OFF

---------------------------------------------------------

SW1-8

ON

Limit speed setting 3

f ---

--------------------------------------------------------

OFF

Setting for limit speed (sewing machine'smaximum sewing speed) (

) is for overlock machines

\ Speed (rpm)

1,000

2,000

2,500

3,000

3,500

4,000

4,500

4,700

(5,000)

(5,500)

(6,000)

(6,500)

(7,000)

(7,500)

(8,000)

(8,500)

DIP switch \

SW1-6

OFF

ON

OFF

ON

OFF

ON

OFF

ON

SW1-7

OFF

OFF

ON

ON

OFF

OFF

ON

ON

SW1-8

OFF

OFF

OFF

OFF

ON

ON

ON

ON

Pulley diameter

105 mm for single-needle machines and overlock machines (90 mm for twin-needle machines)

Note:

When an operation panel has been connected, the operation panel setting has priority, regardless of the setting for DIP switch 1-4.

Only the maximum sewing speed can be changed using the DIP switch 1-5 setting.

Refer to "5-4-2-2. DIP switch 6 41> functions" on this page for other speed selection settings.

5-4-2-2. DIP switch 6 «!> functions

	DIP switch				Setting speed
	SW6-1	Low speed	ON		250 rpm
		(inching speed)	OFF		215 rpm
	SW6-2	Thread trimming	ON		185 rpm
		speed	OFF		215 rpm
	SW6-3	Backtacking speed	ON		1,000 rpm
			OFF		1,800 rpm
	SW6-4	Improved stopping	ON		1,500 rpm
		speed	OFF		1,700 rpm

Note:

DIP switches 1-2, 1-5 and 6 (1- 4) are set to match the optimum sewing speed for the machine head, and so should not be changed. If using the motor after changing over the machine head, check that the above settings match the specifications of the machine head.

5-5. Periodic checks

Single-needle machine and overlock machines setting

-1 -2 -3 -4 -5 -6 -7 -8

SW1 IBlij BBlij EH3 BI

-1 -2 -3 -4

SW6 llij lij lij lij I

Twin-needle machine setting

-1 -2 -3 -4 -5 -6 -7 -8

SW11B~BB~BBBI

-1 -2 -3 -4

sw&~~~~~~

•Clean the dust out of the dust cover at periodic intervals. If the dust cover becomes blocked, there is the danger that the motor may overheat.

•If not using the motor for long periods, turn off the power and disconnect the motor from the power supply.

11	From the library of: Superior Sewing Machine & Supply LLC
	MD-6020, 6120

&. CONNECTING OPTIONS

6. CONNECTING OPTIONS

The options include the operation panel, pedal for standing operation and the material edge sensor. Refer to 11 3-8. Connecting the external operation panel II on page 6 for the operation panel connection methods. Refer to each respective instruction manual for details on the options.

6-1. Connecting the pedal for standing operations

•A variable-speed pedal (J80081-040 or J80380-040} or a two speed pedal (J80630-001} can be connected.

1.Disconnect the synchronizer cord 8.

2.Loosen the two screws 0 (do not remove it}, and then gently pull the cover f) toward you to open it.

3. Loosen the screw 8 (do not remove it}, and then turn

the connector presser plate 0 approximately 90° around the axis of the screw 8 in the direction of the arrow @ in the illustration.

4. Pull the foot plug cap 0 toward you to remove it.

5. Insert the 9-pin connector 0 of the foot plug assembly NOD (J02824-001} 8 into the connector mounting base tB from the front, so that the grounding cord terminal 4D is on the right side.

6. Insert the foot plug assembly 8 as shown in the illustration, and then securely insert the 7-pin connector tD of the circuit board into the 7-pin connector 41) of the control circuit board.

Foot plug assembly NOD

7. Remove the grounding screw 0, and then secure the grounding cord terminal 4D together with the other grounding cord terminals 41 and «0 by re-tightening the grounding screw 0.

8. Return the connector presser plate 0 to its original position, fit it into the notch CB to prevent it from turning, and then securely tighten the screw 8.

9. Securely insert the 9-pin connector 4i for the standing pedal into the 9-pin connector 0.

10. Close the cover f) (be careful not to clamp the cord} and tighten the two screws 0.

11. Connect the synchronizer cord 0.

----ftC.,

From the library of: Superior Sewing Machine & Supply LLC	12
M0-6020, 6120

7. TROUBLESHOOTING

7. TROUBLESHOOTING

7-1. Error displays and their meanings

If an error occurs, an error code will appear in the stitch number display of the operation panel.

When the error code is flashing, check the details of the error, and then turn the power off, eliminate the cause of the problem and then turn the power back on again.

	Error code display	Details	Where to check (after turning off the power)
			Is the machine running smoothly?
		Control box overheating,	Do the DIP switch settings match the machine head and
	PI:		pulley being used?
		overcurrent, interrupted power
			Check if a machine head that is not listed in "8-1-3
		supply	Machine head setting mode list" on page 15 is being
			used.
			Check the power supply voltage.
		Power supply voltage is too high.	If the factory circuit breaker is tripped, the power supply
			voltage may rise momentarily.
		Load is too high.
	ou		Check the machine head and the maximum speed.
		Maximum speed is too high.
			Check if a machine head that is not listed in "8-1-3
			Machine head setting mode list" on page 15 is being
			used.
			If the machine inertia is too great, this error may occur
		Load is too high.	when the motor is decelerating.
	oL		Check the machine head and the maximum speed.
		Maximum speed is too high.	Check if a machine head that is not listed in "8-1-3
			Machine head setting mode list" on page 15 is being
			used.
		Motor or machine head is locking, or	Gently rotate the machine pulley by hand and confirm
	Lo		that it turns. Check the belt tension while referring to
		synchronizer problem
			section 3-2 on page 2. Check the synchronizer.
	FU	8 A solenoid fuse is blown, or	Open the cover and check the 8 A fuse on the circuit
		transformer problem	board.
	Pd	Momentary power supply drop or	If the wiring is too long or the power supply outlet is
			overloaded, the voltage may drop momentarily during
		interrupted power supply
			startup.
	EO	Operation panel switch error (switch	Replace the operation panel.
		continuously on)
	I		Check if the operation panel connectors are disconnected
	E I	Operation panel connection error	or loose. The operation panel may be faulty.
	E3	Memory writing error	Replace the control box or the control circuit board.
	ELl	Memory reading error	Replace the control box or the control circuit board.
	PU	Pulley setting does not match actual	Set the DIP switches according to the machine head and
			pulley being used. (Refer to "5-4-2 Other DIP switch
		pulley used
			functions" on page 11.)
	ol::	Overrun error	If the sewing machine is run continuously for 3 minutes,
			it is stopped as a safety measure.

If not using an operation panel, the backtack LED on the control box (page 10) will flash to indicate errors. The operation panel needs to be used in order to check the nature of the error.

From the library of: Superior Sewing Machine & Supply LLC	14
MD-6020, 6120

8.USING THE OPERATION PANEL F-40

8.USING THE OPERATION PANEL F-40

8-1. Changing the machine head settings
Operation panel (Note) Can only be set for F-40 and F-100.	[DODD] Indicates a display.
	[DODD] Indicates an operation key.

[Sewing speed] key~ ON

[Thread trimming] key ~ ON

Machine head setting mode

I[****]

Use the B ~] ·[\7] key to set the model. Use D ~] ·[\7] key to set the sub-class.

8-1-1. Setting procedure

CD Before turning on the power, check that the motor pulley diameter matches the machine head.

(Refer to 11 8-1-3. Machine head setting mode list".)

® Check the settings for DIP switch 1-2 (pulley size) and whether DIP switch 1-5 is set to single needle machines (overlock machines) or twin needle machines. (Refer to 11 5-4-2-1 DIP switch 1 0 functions" on page 11.)

® Change to machine head setting mode.	l* * * *1 will appear in the ABCD display.
While pressing the [sewing speed] key@, turn on the power switch.
U* ***1 represents the previous setting value.)
@) Set the machine head.
1) Meaning of display

The machine head model appears in the ABC columns, and the sub-class appears in the D column.

2)Setting method

a)Press the B [ t:. H " l key to set the machine head model.

b)For the D column display, press the D [ t:. H " l key to set the sub-class.

c)Press the thread trimming key to end the setting and store the setting value. (Refer to "8-1-3. Machine head setting mode list" on page 15.)

8-1-2. Initializing the machine head setting value

1)When changing the setting for DIP switches 1-2, 1-5 or 6 Initial value: [1313] when switch 1-5 is OFF (single needle)

[8Y23] when switch 1-5 is ON (twin needle)

Note:

Only the maximum sewing speed can be set in machine head setting mode.

For machine heads other than 7370 and 8420, the sewing speed must be set according to the procedure in "8-1-4. Other machine sewing speeds" on page 16. (Refer to "8-2 Setting the sewing speed to match the machine head" on page 17.)

8-1-3. Machine head setting mode list

This table shows the machine head names, maximum sewing speeds and motor pulley diameters.

(1) Single needle (When DIP switch 1-5 is OFF)

Machine head

Machine pulley diameter

uABCn display

II D" display

Motor pulley diameter

t

7370/201 onsso

<1>75

l

3

l

3···4,700 rpm

s ...3,500 rpm

1···4,000 rpm

<I>

105

7240

<1>75

l

2 '1

s ...4,000 rpm

5···3,500 rpm

-----

<I> 105

7910

<1>75

l

g

II

3...4,500 rpm

<I> 105

7740

<1>75

l

l

y

3...4,500 rpm

5···3,500 rpm

------

<I> 105

7220

<!>75

l

2 2

3···4,700 rpm

s ...4,000 rpm

<I> 105

===--====== :.

7480

<1>75

l

'-1

8

s .. -4,000 rpm

1...3,000 rpm

~

<I> 105

7980n280

<!>75

l

g 8

None-..2,000

rpm

<I> 105

.,

-

7720

<!>75

I

l

2

3...4,700 rpm

===-=

<I> 105

7780

<1>75

l

l

8

3...4,100 rpm

<I> 105

8520/8530/

<1>77

8 s

2

3...4,500 rpm

~

<I> 105

8540

8830

<1>77

8 8 3

None-..850 rpm

<I> 105

Overlock

<!>55

o u

L

None..·8,500 rpm

<I> 105

15	From the library of: Superior Sewing Machine & Supply LLC
	MD-6020, 6120