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4 - 9
Adjustment (Main Unit)
In
spection and
Adjustment
Needle bar height adjustment
1. Remove the front cover, and turn on the power while pushing SW1 and SW3 on the main PCB assy. (the buzzer
sounds four times and test mode starts).
*See (4 - 4 "Test Mode") for starting test mode with the front cover in place.
2. Press SW5 six times (with the front cover in place, press
twice and select
, and after pressing
, press
once.) and move the needle bar to the left base line position.
3. Turn the power off.
4. Remove the M4 screws (two), and remove needle plate A from the feed base.
5. Hand turn the pulley until the right edge of the needle and the outer rotary hook tip meet.
6. Loosen the set screw (socket (CP) M4X4) in the needle bar hook stand assy.
7. Adjust the height of the needle bar for 1.0 – 1.4 mm between the top of the needle hole and lower edge of the
outer rotary hook tip.
NOTE •
Make sure the needle block is not positioned at a slant.
8. Perform "Adjust the needle thread block" (4 - 29).
9. Attach needle plate A to the feed base using M4 screws (two).
17
3
Set screw, socket
(CP) M4X4
Needle bar hook stand assy
Needle bar
Summary of Contents for BLMY
Page 1: ......
Page 2: ......
Page 3: ......
Page 19: ...1 8 ...
Page 21: ...2 2 Main parts location diagram Main unit ...
Page 30: ...2 11 Disassembly Electrical parts and motors location diagram Main unit ...
Page 37: ...2 18 Thread tension mechanism location diagram Main unit ...
Page 43: ...2 24 Bobbin winder mechanism location diagram Main unit ...
Page 49: ...2 30 Needle bar presser mechanism Upper shaft mechanism location diagram Main unit ...
Page 53: ...2 34 Needle presser module breakout diagram 78 Modules ...
Page 66: ...2 47 Disassembly Feed and bobbin module breakout diagram Modules ...
Page 75: ...2 56 Thread cutter module breakout diagram Modules ...
Page 79: ...2 60 ...
Page 81: ...3 2 Needle bar presser mechanism upper shaft mechanism location diagram Main unit ...
Page 90: ...3 11 Assembly Bobbin winder mechanism location diagram Main unit ...
Page 94: ...3 15 Assembly Thread tension mechanism location diagram Main unit ...
Page 102: ...3 23 Assembly Electrical parts and motors location diagram Main unit ...
Page 109: ...3 30 Main parts location diagram Main unit ...
Page 120: ...3 41 Assembly Needle presser module breakout diagram 78 Modules ...
Page 139: ...3 60 Feed module breakout diagram Modules ...
Page 155: ...3 76 Thread cutter module breakout diagram Modules ...
Page 161: ...3 82 ...
Page 191: ...4 30 ...
Page 226: ......