Brother BAS-761 Service Manual Page 155
- Page / 179
- Table of contents
- BOOKMARKS
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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 between these chamfering blades and tucking blade L to about the material
thickness.
B. When the chamfering blades are attached above the correct position, the body does not stray but
the pocket strays.
Slightly lower the chamfering blades and the pocket opening part of tucking blade L. Be sure not to lower them
too much, which results in “Cause A”.
C. Tucking blade L has burrs.
Remove the burrs and buff the tucking blade.
D. The clearance between the center blade and the needle plate is small.
Loosen the bolts on both sides and the set screw, then adjust the center blade height by rotating the adjust
screw. One turn raises or lowers the inner clamp lever by 1.25 mm, and raises or lowers the center blade by
approximately 2 mm. When the center blade is at its lowest position and lightly presses the body, make sure that
some resistance can be felt in the front of the center blade.
The detailed adjustment procedures are described on “5-12. Adjusting the folding clamp”.
E. The inner blades are improperly adjusted.
This is caused by the clearance between the center blade edge and the inner clamp blade being too large or too
small, or when the inner clamp blades strike the center blade. Set the clearance width to the pocket material
thickness + α, as shown in the figure on the left.
F. Program defect
Reprogram partially.
Connecting block SR assembly
Bolt 5X25
Folding clamp 3-corner J
Connecting block SL assembly
Bolt 4X8
Adjusting screw
Settin
g
p
late
Tucking blade R-3J
Tucking blade L-3J
Tucking blade LD-3J
Tucking blade RD-3J
Chamfering blade RJ
Chamfering blade LJ
1792S
Folding clamp assembly
Rod nut
Adjust screw
Set screw
Bolt
1828S
Material thickness + α
1830S
- SAFETY INSTRUCTIONS 2
- CAUTION 3
- 3. Warning labels 5
- 1-3. Needle zigzag mechanism 10
- 1-4. Lubrication mechanism 12
- 1-5. Thread trimmer 14
- 1-6. Presser bar lifter 16
- 1-7. Stacker 16
- 1-8. Feed guide mechanism 17
- 1-9. Folding mechanism 18
- 1. MECHANICAL DESCRIPTIONS 19
- 1-11. Bobbin winder mechanism 20
- 2-1. Basic operation 21
- <Starting> 22
- <Removing stacker> 23
- <Removing folding base> 24
- 3. DISASSEMBLY 25
- 3-2. Presser foot mechanism 26
- 3-5. Needle bar 28
- 3-6. Motor 29
- 3-7. Timing belt 29
- 3-8. Auxiliary shaft 30
- 3-9. Zigzag 31
- 4. ASSEMBLY 33
- 4-2. Auxiliary shaft 34
- 4-3. Timing belt 34
- 4-4. Motor 35
- 4-5. Needle bar 36
- 4-8. Presser foot mechanism 38
- 4-9. Cover 39
- 5. ADJUSTMENT 41
- X2.4 rotary hook : 2.4 mm 46
- X1.7 rotary hook : 1.8 mm 46
- X2.4 rotary hook : 1.2 mm 46
- 5-4. Tension release 49
- 5-5. Thread tension 49
- <Thread guide, R> 50
- <Fixed knife> 51
- <Needle> 51
- 5-11-1. Folding clamp 56
- 5-11-2. Inner clamp 56
- 5-11-3. Center blade 56
- 5-11-4. Sewing clamp 57
- 5-11-9. Stacker wiper 59
- 5-11-10.Stacker bar inside 59
- 5-11-11. Stacker bar outside 59
- 5-11-12. Stacker roller 60
- 5-30-2. Setting of MODE 73
- <Operation panel> 76
- <Programmer> 76
- 6-3. Power supply 77
- 6-4. PROM 80
- 6-5. Connector 81
- P3 [TRIM] (MOLEX 5273-02A) 82
- P4 [POWER] (MOLEX 5566-10A) 82
- P7 [FDD] (3 M 3431-6002SCFL) 84
- P23 [CLAMP] (MOLEX 5045-03A) 88
- 6-5-2. Power supply PCB 91
- P1 [MAIN] (MOLEX 5277- 04A) 91
- P4 [AC-IN] (MOLEX 5277 - 06A) 91
- 6-5-3. Operation panel PCB 92
- 6-5-4. Programmer PCB 94
- P2 [MAIN] (MOLEX 5268-12A) 94
- 6-5-5. Pattern sensor PCB 95
- 6-6. Sensor 96
- 6-6-2. Function of sensor 97
- < Jig pattern sensor > 99
- < Cylinder sensor > 100
- < Clamp-in sensor > 101
- BAS-7610 102
- 6-7. Harness 103
- 6-8. Servo amplifier 115
- < Servo motor > 116
- 6-9. DIP switches 119
- 6-10. Error code 121
- 6-11. Exchange of PCB 125
- 6.ELECTRIC COMPONENTS 126
- 6. ELECTRIC COMPONENTS 127
- 7. FOLDING MACHINE 131
- 7-2. Valve 133
- 7-4. Adjustment 136
- Tucking blade R-3J 138
- Tucking blade L-3J 138
- Tucking blade LD-3J 138
- Tucking blade RD-3J 138
- D. Program defect 139
- C. Program defect 140
- B. Program defect 142
- E. Program defect 148
- D. Program defect 149
- A. The flap margin is small 153
- A. The flap margin is small 156
- A. The flap margin is large 157
- 21. The pocket top is narrow 162
- 22. The seam margin is large 163
- <Cause> 168
- Tucking blade D 172
- Tucking blade RDD or LDD 172
- 1 - 2 mm 172
- Tucking blade RD 172
- 4. The base is curved 173
- 8. The corners are round 177
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