Needle Bar Height Adjustment - Baby Lock BLMY Service Manual

Adjustment (Main Unit)
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
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).
Set screw, socket
(CP) M4X4

Needle bar height adjustment

Needle bar hook stand assy
Needle bar
twice and select , and after pressing
17 3
, press
4 - 9