Brother Z-8550A Service Manual Page 81
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- Table of contents
- TROUBLESHOOTING
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Z-8550A, 8560A
9. ADJUSTMENTS
72
9-8. Feed amounts for reverse stitching and condense stitching
The feed amounts for reverse stitching and condense
stitching are set using the condense dial (1).
If the stitch length for the finished stitches differs greatly from
the scale, carry out the following adjustment. (The scale is
intended as a guide.)
1. Set the condense dial (1) to “0”.
2. With the reverse stitching lever (2) pushed down, turn the
machine pulley about 10 times and check that the
material feed amount is zero.
If the feed amount is not zero, carry out the adjustments
in steps 3. and 4. below.
3. Move the condense dial (1) slightly to the left or right from
the “0” position on the scale.
Repeat the check in step 2. above, and find the position
where the material feed amount is zero.
4. At the position where the material feed amount is zero,
loosen the screw (3), turn only the dial of the condense
dial (1) to align it with the “0” position on the scale, and
then secure it by tightening the screw (3).
9-9. Needle and feed timing
Adjust so that the mark on the level feed eccentric wheel
(2) is aligned with the mark on the feed driving
connecting rod (3) when the reference line on the thread
take-up lever (1) is aligned with the mark (“B” for the 8550A,
“C” for the 8560A) on the face plate.
1. Tilt back the machine head.
2. Align the reference line on the thread take-up lever (1)
with the “B” mark (for the 8550A) or the “C” mark (for the
8560A) on the face plate.
3. Loosen the four set screws (4).
4. Turn the level feed eccentric wheel (2) to align
the mark with the mark on the feed driving
connecting rod (3).
5. Securely tighten the four set screws (4).
* After the needle and feed timing has been adjusted, also
carry out the adjustment in “9-14. Needle and rotary hook
timing”.
For the 8560A, also carry out the adjustment in “9-21.
Adjusting the position of the thread trimming cam”.
1181B
0143B
0142B
- Z-8550A 1
- Z-8560A 1
- SAFETY INSTRUCTIONS 3
- DANGER 3
- CAUTION 3
- Environmental requirements 4
- Installation 4
- Cleaning 5
- Maintenance and inspection 6
- Oil pan 7
- (For Europe) 7
- CONTENTS 8
- 1. MACHINE SPECIFICATIONS 10
- 2. SEWING PATTERN 11
- 3. FUNCTION SETTINGS 12
- 3-3. Data initialization 23
- Green display 24
- Orange display 24
- DANGER 30
- 0) so that the 31
- (Initial setting is “0”) 31
- 4. USING CF CARDS 32
- 5. MECHANICAL DESCRIPTIONS 41
- 5-3. Zigzag mechanism 43
- 5-4. Presser foot mechanism 44
- 5-5. Feed mechanism 46
- 5-6. Lubrication mechanism 49
- 6. DISASSEMBLY 55
- 6-1. Covers 56
- 6-2. Presser foot mechanism 57
- 6-3. Needle bar mechanism 57
- 6-4. Zigzag mechanism 58
- 6-5. Rotary hook mechanism 60
- 6-6. Lubrication mechanism 61
- 6-7. Feed mechanism 61
- <Knife unit> 62
- 7. ASSEMBLY 64
- 7-2. Feed mechanism 65
- 7-3. Lubrication mechanism 66
- 7-4. Zigzag mechanism 67
- 7-5. Needle bar mechanism 68
- 7-6. Rotary hook mechanism 69
- 7-7. Presser foot mechanism 70
- 7-8. Covers 71
- Be careful of the knives 71
- CAUTION 73
- Setting for 1st turn 75
- Setting for 2nd turn 75
- 9. ADJUSTMENTS 76
- 9-3. Thread tension spring 78
- 9-4. Presser foot height 79
- 9-5. Feed dog height 79
- 9-6. Feed dog angle 80
- 9-9. Needle and feed timing 81
- 9-10. Needle bar height 82
- 9-13. Needle zigzag load 85
- Maximum zigzag width 86
- CAUTION 87
- 9-18. Adjusting the treadle 88
- Should not touch 93
- 10-2. Applying grease 95
- 11. ELECTRICAL MECHANISM 97
- 11-3. Description of fuses 99
- Z-8550A, 8560A 100
- 11-4-1. Connector positions 101
- 11-5. Troubleshooting 103
- 11-5-2. Diagnosis flowchart 104
- 11-5-3. Remedy 106
- 11-6. Wiring diagrams 110
- 12. TREADLE UNIT 112
- . Types 112
- 1) Entering signal settings 114
- 5) Ending the settings 115
- 13. STANDING OPERATION PEDAL 116
- 13-2. Connectors 117
- 14. TROUBLESHOOTING 118
- 15. ERROR CODES 123
- LCD display character list 126
- SERVICE MANUAL 128
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