4 - 8
Adjustment (Main Unit)
Needle bar rise adjustment
1. Attach the operation PCB assy. flat cable and power PCB assy. lead wire connector to the main PCB assy., and
attach the front cover to the arm bed.
2. Press and while turning the power on (the buzzer will sound four times, and test mode will start).
3. <S2>
Select using , press once, and set the needle bar to the left base line position.
<S3>
Select using or , and after pressing press once, and set the needle bar to the left
base line position.
4. Turn off the power and remove the front cover.
5. Attach the presser foot (J).
6. Lower the presser foot lifter.
7. Loosen the set screws (socket (FT) M5X5) (three) on lower shaft pulley D.
8. Turn the pulley by hand, moving the needle bar to its lowest point (pulley turned counterclockwise).
9. When the needle bar is raised 2.9 – 3.3 mm above its lowest point (use a ruler on the left side to measure), rotate
the outer rotary hook and adjust it so that the right edge of the needle and the outer rotary hook tip meet (outer
rotary hook turned counterclockwise).
10. Fully tighten the set screws (socket (CP) M5X5) (three) on lower shaft pulley D.
Set screw, socket (CP) M5X5
torque 1.18 - 1.57 N-m
2.9 - 3.3mm
Needle is 2.9 - 3.3 mm above its lowest point.
After raising it, the right edge of the needle and the tip meet.
set screw, socket 5 × 5
Lower shaft pulley D
2.9 - 3.3mm
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