Brother BAS-761- Manuals

INDEX 1. MECHANICAL DESCRIPTIONS .........................................................................................1-01 1-1. Upper shaft and needle bar mechanism ..................................................................................................1-01 1-2. Lower shaft and rotary ...

6. ELECTRIC COMPONENTS .....................................................................................................6-01 6-1. Precautions at the time of adjustment ......................................................................................................6-01 6-2. Components insid...

1. MECHANICAL DESCRIPTIONS BAS-7610 1-01 1. MECHANICAL DESCRIPTIONS Operate in the order of the numbers in the illustration.The “A”, “B” and other alphabets with the numbers indicate different sequences of operation which can occur at the sametime. 1-1. Upper shaft and needle bar mechanism 1-2. Lowe...

1. MECHANICAL DESCRIPTIONS BAS-7610 1-07 <Explanation of the upper and lower thread trimming> Lower thread 1571S Upper thread Movable knife Fixed knife Lower thread finger 1572S This point the needle thread take-up is raisedslightly above its lowest position. 1573S When the movable knife is sp...

2. BEFORE DISASSEMBLY AND ADJUSTMENT BAS-7610 2-01 2. BEFORE DISASSEMBLY AND ADJUSTMENT DANGER 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 pre...

2. BEFORE DISASSEMBLY AND ADJUSTMENT BAS-7610 2-04 <Removing stacker roller> <Removing folding base> * Carry this out only at the last and final operation. Carry out the operation carefully and correctly with two personnel or more.Work is done by removing a rear cover and a side cover. N...

5. ADJUSTMENT BAS-7610 5-06 <Adjusting the needle and the rotary hook timing> Turn the pulley to raise the needle bar (1) from its lowest position. Adjust the rotary hook so that the side “2” of the gauge(5) and the lower end of the needle bar (1) align. At this time, the clearance between the...

5. ADJUSTMENT BAS-7610 5-07 5-3. Adjusting the thread trimmer timing Remove the slide plate (the needle plate), the bottom plunger and the work clamp while making this adjustment. <Adjusting the thread trimmer cam position> 1. Remove the thread guide of the needle bar (1). 2. Turn the machine ...

5. ADJUSTMENT BAS-7610 5-08 <Adjusting the movable knife, fixed knife position> 4. The fixed knife (8) and the movable knife (9) must overlap when the slide block of the thread trimmer cam (5) is lifted to the top of the roller (4) the thread trimmer cam lever. To increase the overlap, loosen ...

5. ADJUSTMENT BAS-7610 5-12 5-6. Adjusting the machine sensor Both of the sensors -- adjustment width -- it becomes a central position mostly.Remove the pulley cover (1) while making this adjustment. <The sensor position to send the thread trimmer signal properly> The needle rises 3 mm from it...

5. ADJUSTMENT BAS-7610 5-13 5-7. Adjusting the work clamp height 5-8. Adjusting the rotary hook lubrication amount The amount of oil : In the illustration (Sewing speed 4250 rpm, 7 second) ---Factory settingAdjust → Turn the screw (1) 1. Use machine head operation check : Mode change → Turn the powe...

5. ADJUSTMENT BAS-7610 5-15 5-11. Adjusting speed of the pneumatic mechanism <The valves location of the folding machine> Remove the cover while making this adjustment. 1 Folding clamp 6 Folding base (1.5 mm-stroke) 2 Inner clamp 7 Label attachment device (Option) 3 Center blade 8 Suction (Vac...

5. ADJUSTMENT BAS-7610 5-21 5-13. Adjusting the inner clamp Compatibility of different models may be lost through this adjustment.Activate air compression. Turn on the power. 1. Set the step mode. (Press the [FOLDING MODE] switch.) Lower the inner clamp (1). (Press the [STEP] switch.)2. Secure the i...

5. ADJUSTMENT BAS-7610 5-33 5-30. Adjusting the upper thread breakage detector 5-30-1. How to insert the fiber 5-30-2. Setting of MODE While making adjustment, the mode selection switch is changed to the "MODE" side. (The volume indicator under setupblinks.)It will be set up if the jog switc...

6. ELECTRIC COMPONENTS BAS-7610 6-01 Control circuit board Servo amplifier (Sewing machine) Servo amplifier (Y) Servo amplifier (X) Noise filter Power supply transformer 1 Power supply unit (Transformer 2) 6. ELECTRIC COMPONENTS DANGER Wait at least 5 minutes after turning off the power switch and d...

6. ELECTRIC COMPONENTS BAS-7610 6-03 6-3. Power supply 6-3-1. Fuse Note When replacing a fuse, be sure to use the specified ones listed below. No. Part name Part code Manufacturer When a fuse has blown F1 Fuse C (2A-125V) 152566000 SATO F7161 2A The bobbin winder does not turn. F2 Fuse B (5A-125V) 1...

6. ELECTRIC COMPONENTS BAS-7610 6-05 6-3-4. Conversion of power supply voltage 1769S Breaker (A type changes with voltage.) Red White 1770S Breaker F10A(S21504000) Breaker F5A(S21181000)

6. ELECTRIC COMPONENTS BAS-7610 6-07 6-5. Connector 6-5-1. Main PCB The figure is a part code S51862 - PCB. No. Connection No. Connection P1 Machine sensor P17 Foot switch P2 Stacker motor P18 Start switch P3 Thread trimmer solenoid P19 Clamp-in sensor P4 Power supply PCB P20 Home position, over tra...

6. ELECTRIC COMPONENTS BAS-7610 6-17 6-5-2. Power supply PCB P1 [MAIN] (MOLEX 5277- 04A) Pin No. Signal name Probable symptoms due to poor contact 1 ± 0V 2 +24V The air valve does not operate.The over travel sensor lamp is not lit. 3 ± 0V 4 +36V The stacker roller does not turn. P2 [THREAD MOTOR] (M...

6. ELECTRIC COMPONENTS BAS-7610 6-20 6-5-4. Programmer PCB P1 [LCD] (JAPAN SOLDERLESS TERMINAL 19FE-ST) Pin No. Signal name Probable symptoms due to poor contact 1-19 LCD control LCD does not indicate. P2 [MAIN] (MOLEX 5268-12A) Pin No. Signal name Probable symptoms due to poor contact 1 2 ± 0V 3 Re...

6.ELECTRIC COMPONENTS BAS-7610 6-22 6-6. Sensor 6-6-1. Sensor location No. Sensor name Type No. Sensor name Type 1 Over travel sensor (-X) A 12 Cylinder sensor (folding base) C 2 X home position sensor A 13 Cylinder sensor (center blade) C 3 Over travel sensor (+X) A 14 Machine sensor (needle up) B ...

6. ELECTRIC COMPONENTS BAS-7610 6-23 6-6-2. Function of sensor < Home position sensor (X, Y) > Sensor Connecto r Pin No. Signal name State in case sensor LED is ON The error No. at fault 13 +24V 14 X home position X (2) P20 15 ± 0V Sewing clamp is in home position. E-840 Sensor Connecto r Pin ...

6. ELECTRIC COMPONENTS BAS-7610 6-41 6-8. Servo amplifier 6-8-1. Names of major parts < Servo amplifier > No. Name, Use 1 Battery holder The battery for position data preservation is contained absolutely.It does not use by BAS-761, 7610. 2 Connector for battery (CON1) The battery for position ...

6. ELECTRIC COMPONENTS BAS-7610 6-43 6-8-2. Abnormalities and a measure If abnormalities occur on servo amplifier or a motor (E-870, 880, 890), “AL. **” will be displayed on the display part ofservo amplifier. The meaning of an error code and the list of check items are as follows. < Servo amplif...

6. ELECTRIC COMPONENTS BAS-7610 6-45 6-9. DIP switches Note Always turn off the power supply before changing any of the DIP switch settings.The function of the DIP switches are subject to changes without notification.If DIP switches B-1 to B-6 are ON, be sure to check the cylinder movement and data ...

7. FOLDING MACHINE BAS-7610 7-04 7-3. Operation order and connection of folding machine The multi connectors and valves (page 7-03) connections are as follows. The valve operation order : Valves 10 → 13 turn ON in turn, and they turn OFF in order 10 → 11 → 13 → 12. Multi connector No. Valve No. and ...

7. FOLDING MACHINE BAS-7610 7-09 B. The pocket material or body strays when the center blade retracts from the pocket. B-1. The center blade has burrs. B-2. When the power is turned OFF, the clearance between the center blade bottom surface and the needle plate top surface is not correct. A small cl...

7. FOLDING MACHINE BAS-7610 7-10 2. Seam deviates up in parallel (reverse case to 1). <Cause> A. The pocket material is improperly folded because the center blade is positioned above the correct position. After loosening the eight bolts (1), shift the center blade backward in the loose holes o...

7. FOLDING MACHINE BAS-7610 7-11 3. The seam margin at the pocket top is different. <Cause> A. The pocket material is improperly set. Set the pocket material correctly up to plate spring R and L. B. Plate spring R and L are improperly adjusted. Adjust the plate spring positions by loosening th...

7. FOLDING MACHINE BAS-7610 7-12 4. Seam deviates to the left in parallel. <Cause> A. The pocket material is improperly folded because the center blade is attached to the right of the correct position. After loosening the eight bolts (1), shift the center blade to the left in the loose holes o...

7. FOLDING MACHINE BAS-7610 7-13 5. Seam deviates to the right in parallel. <Cause> A. The pocket material is improperly folded because the center blade is attached to the right of the correct position. After loosening the eight bolts (1), shift the center blade to the right in the loose holes...

7. FOLDING MACHINE BAS-7610 7-14 6. Partial seam deviates in parallel. <Cause> A. The inner clamp blades are improperly positioned. • The seam margin is large.This happens when the clearance between the center blade edge and the inner clamp blades is too small ortoo large, or when the inner cl...

7. FOLDING MACHINE BAS-7610 7-15 C. Tucking blades R, L, RD and LD have burrs. Remove the burrs and buff the tucking blades. D. Because tucking blades R, L, RD and LD are attached below the correct position, the pocket material strays with the body when the tucking blades retract. Raise and reattach...

7. FOLDING MACHINE BAS-7610 7-16 7. The stitch at the bottom corner is not aligned with the center line of the folded pocket. <Cause> A. The left edge of tucking blade RD is off to the left. Set the clearance between the center blade top and tucking blade RD left edge to 0.5 - 1 mm, as shown i...

7. FOLDING MACHINE BAS-7610 7-17 8. The seam margin at the bottom is large. <Cause> A. The inner clamp blades are improperly adjusted. After loosening the inner clamp blade attaching screws, adjust the clearance between the center blade edge andthe inner clamp blades. If the clearance is large...

7. FOLDING MACHINE BAS-7610 7-18 D. There is no clearance between tucking blades LD and RD. Adjust the clearance so that it is about the same thickness as a piece of pocket material. E. Program defect Reprogram partially

7. FOLDING MACHINE BAS-7610 7-19 9. The seam margin at one side of the bottom is large. <Cause> A. The inner clamp blades are improperly adjusted. Refer to “Trouble 6. Cause A”. B. Tucking blades LD or RD has burrs at the place corresponding to the pocket trouble. Remove the burrs and buff the...

7. FOLDING MACHINE BAS-7610 7-20 10. The seam margin is too small at the corners on both sides. <Cause> A. The inner clamp blades are improperly adjusted. Refer to “Trouble 6. Cause A”. B. Tucking blades LD and RD are improperly adjusted. Shift tucking blade LD slightly to the left to increase...

7. FOLDING MACHINE BAS-7610 7-21 11. The folded lone at the bottom corner is round. <Cause> A. Tucking blades LD and RD are improperly adjusted. If this is caused by tucking blade RD being off to the left, refer to “Trouble 7. Cause A”. B. There is no clearance between tucking blade LD and RD....

7. FOLDING MACHINE BAS-7610 7-22 12. The seam margin at the bottom is too small. <Cause> A. The inner clamp blades are improperly adjusted. Slightly enlarge the clearance between the center blade edge and the inner clamp blades at the placecorresponding to the pocket trouble. The clearance sho...

7. FOLDING MACHINE BAS-7610 7-23 13. The pocket outline is curved. <Cause> A. The flap margin is small. Make the flap margin at least 8 mm. B. The tucking blades have burrs. Remove the burrs and buff the tucking blades. C. The clearance between the tucking blades of the folding clamp assembly ...

7. FOLDING MACHINE BAS-7610 7-25 14. The pocket opening is wide. <Cause> A. When the chamfering blades are attached below the correct position, the body and the pocket stray when the chamfering blades retract. Move upward and reattach the chamfering blades.At this time, set the clearance betwe...

7. FOLDING MACHINE BAS-7610 7-26 15. The pocket opening is not tucked in. <Cause> A. The flap margin is small. Make the flap margin at least 15 mm. B. Tucking blade L and R are improperly attached. Slide the tucking blades forward. If this adjustment is not enough to solve the trouble, enlarge...

7. FOLDING MACHINE BAS-7610 7-27 16. The flap margin at the pocket opening is out of the pocket. <Cause> A. The flap margin is large. Set the pocket material onto the center blade so that the flap margin is even at every point. The proper length ofthe flap margin is 12-15 mm. When the flap mar...

7. FOLDING MACHINE BAS-7610 7-28 17. Material protrudes from the pocket opening. <Cause> A. Tucking blade L and R are improperly positioned. Slide the tucking blades forward. If this adjustment is not enough to solve the problem, enlarge the chamferedparts of the tucking blades by machining.At...

7. FOLDING MACHINE BAS-7610 7-29 18. The pocket pattern is not aligned with the body pattern (when the pattern is vertical). <Cause> A. The pocket and the body are improperly positioned. Position them correctly in mode pattern matching. B. The pattern pitch of the pocket is different from that...

7. FOLDING MACHINE BAS-7610 7-31 20. The needle location at the corners is improper. <Cause> The inertia of the X-Y movement mechanism results in improper needle location, which is differentfrom the programmed points. (Note: The machine motor rotating speed may vary the needle locationat each ...

7. FOLDING MACHINE BAS-7610 7-32 21. The pocket top is narrow. <Cause> A. The inner clamp blades are improperly positioned. Increase the clearance between the center blade edge and the inner clamp blades at the pocket top. B. When the top edge of the pocket material is not clamped by the sewin...

7. FOLDING MACHINE BAS-7610 7-33 22. The seam margin is large. <Cause> A. Because the forward part of the center blade is curved up, the clearance between the needle plate and the center blade is large only at the forward part. Remove the center blade. Distort the center blade to level. B. The...

7. FOLDING MACHINE BAS-7610 7-34 23. The pocket has skipped stitches at the sewing start. <Cause> A. The needle thread coming out of the needle is short. • Lengthen the thread in pretension. • Check the opening amount between the tension discs. • Perform reverse stitching 2-3 stitches after re...

7. FOLDING MACHINE BAS-7610 7-35 24. The stitch pitch is uneven at the corners. <Cause> The inertia of the X-Y movement mechanism results in improper needle location, which is differentfrom the programmed points.(Note: The machine motor rotating speed may vary the needle location at each corne...

7. FOLDING MACHINE BAS-7610 7-40 1. The tucked margins at the bottom protrude on both sides. <Cause> A. The flap margin is too large. Set the pocket material onto the center blade so that the flap margin is even at each point. The proper length ofthe flap margin is 12-15 mm. If the flap margin...

7. FOLDING MACHINE BAS-7610 7-41 2. The flap margins at the bottom on both sides are not tucked in. <Cause> A. The flap margin on both sides are too small. Adjust the flap margin to 12-15 mm. B. Tucking blade RD or LD is improperly positioned. Shift the tucking blade backward, then adjust it s...

7. FOLDING MACHINE BAS-7610 7-42 3. The tucked flap margins at the bottom protrude below. <Cause> A. Tucking blade RD or LD is improperly positioned. Refer to “Trouble 2. Cause B”. B. Because the clearance between tucking blade D and RDD or LDD is too small, the pocket material strays when the...

7. FOLDING MACHINE BAS-7610 7-44 5. The tucking blades do not operate smoothly. <Cause> Because tucking blade RDD or LDD is attached below the correct position, tucking blades RDD orLDD and D do not retract smoothly. Adjust the clearance between these two tucking blades to approximately 1-2 mm...

7. FOLDING MACHINE BAS-7610 7-46 7. The bottom seam is zigzag chain stitch. <Cause> The seam sewn from left to right almost aligns with the border line between the hitch stitch andperfect stitch. This problem happens when both of these stitches appear. Because this is a basic property in a sew...

SERVICE MANUAL 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone: 81-52-824-2177 Printed in Japan 151-761 I2110825 2002.12. H (1)

iv BAS-761 CAUTION If the power switch and air need to be left onwhen carrying out some adjustment, be ex-tremely careful to observe all safety precau-tions. Use only the proper replacement parts asspecified by Brother. If any safety devices have been removed, beabsolutely sure to re-install them to...

v BAS-761 1 ★ 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. Safety devices: Thread take-up cover, Guard...

BAS-761 CONTENTS 1. Names of Machine Components .............................................................................................................. 1 2. Specifications ............................................................................................................................

1 BAS-761 1. Names of Machine Components 1. Names of Machine Components q Foot-switch w Stacker e Guard bar r Feed roller t Machine head y Spool stand u Top cover i Control box o Switch box !0 Folding group assembly !1 Mechanical valve !2 RESTART buttons !3 Front supporter !4 Floppy drive !5 Program...

4 BAS-761 3-2.Removal of the fixing bolts from the machine The machine head and the sewing clamp arm are fixed with bolts to secure them during transportation. Remove fixing bolt q on the machine head through the hole in the front cover. Note: ¡ Save removed fixing bolts q future use. ¡ Before trans...

6 BAS-761 Loosen the mounting bolts e for the operation box q and switch box w , and move them in the direction of the arrow to a position where they are comfortable to oper-ate. 3-7. Installation positions for operation box and switch box e w q 3. Installation

7 BAS-761 3-8. Installation of the folding group assembly Before installation ¡ Apply air pressure. ¡ Turn on power switch q to return the machine to the home position. ¡ Turn valve switch w to OFF (lower) side and "E-820" will flash on the display. 1. Install folding clamp assembly e onto f...

18 BAS-761 FOLDING MODE AUTO PATTERNLABELSTEP 7-2. Setting the sewing speed and the bar tacking speed ¡ These settings can be made when the machine head is at the standby position, while the bobbin is being replacedand while sewing is stopped. ¡ The bar tacking speed cannot be greater than the sewin...

21 BAS-761 7. Settings before sewing 7-4. Setting the piece counter ¡ This setting can be made when the machine head is at the standby position and while the bobbin is being re-placed. ¡ The piece counter can be set to "0" (reset), or it can be decremented by 1, It cannot be incremented. Cha...

23 BAS-761 8. Preparation for sewing 8. Preparation for sewing Press FOLDER RESET SW to start searching for homeposition. Screen 7 1. Apply air pressure and turn on power switch.Screen 7 will then be displayed on the panel. 2. Press the FOLDER RESET button !9 . The machine head will move to the home...

25 BAS-761 9. Sewing 9. Sewing 9-1. Sewing with the folder in automatic mode 2. Press the FOLDER RESET button !9 . The machine head will move to the home position and thenstop in the standby condition. 3. Set the folder mode to automatic mode. NOTE: Refer to page 18 for details on how to set the fol...

26 BAS-761 9. Sewing 9-2. Sewing with the folder in pattern matching mode 2. Press the FOLDER RESET button !9 . The machine head will move to the home position and then stop in the standbycondition. 3. Set the folder mode to pattern matching mode. NOTE: Refer to page 18 for details on how to set the...

27 BAS-761 9-3. Sewing with the folder in label attachment mode ¡ Two types of label attachment mode can be used: when DIP switch D-2 is set to OFF, alternate label attachmentis carried out, and when DIP switch D-2 is set to ON, continuous label attachment is carried out. ¡ With alternate label atta...

33 BAS-761 10-4. Removal of the fixed knife and the movable knife Note: Turn off the power switch. ■ Removal of the fixed knife 1. Remove flat-head screws q and then needle plate RR w and needle plate RL e . 2. Remove clamping screws r and then tilt the machine head. NOTE: At this time, adjust the p...

35 BAS-761 10. Adjustments 10-6. Sewing clamp assembly number selection ¡ Attach slit C and Slit D to the sewing clamp assembly by a clamping screw and a spring washer.See the table below for the sewing clamp assembly numbers. ■ Sewing clamp assembly number NOTE: ¡ For retractable clamps, set jumper...

36 BAS-761 No. 1 2 3 4 5 6 7 8 Functions when ON In automatic, pattern matching and label attachment modes, the work clamp stops momentarily beforefeeding to the home position. Low feeding speed (Machine head → Folder) Low feeding speed (Folder → Machine head) Not available (Should be set to OFF) No...

38 BAS-761 Error code E – 500 E – 501 E – 502 E – 503 E – 504 E – 505 E – 510 E – 511 E – 512 E – 513 E – 520 E – 530 E – 535 E – 536 E – 540 E – 550 E – 560 E – 570 E – 580 E – 600 E – 700 E – 701 E – 710 E – 711 E – 720 E – 730 E – 740 E – 750 E – 780 E – 781 Reset No No No No No No Yes Yes Yes Ye...

INSTRUCTION MANUAL Printed in Japan 151-761 S93761-102 2000.09. B (1) BROTHER INDUSTRIES, LTD. 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone: 81-52-824-2177