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Inspection and
Adjustment
Inspection and
Adjustment
Adjustment Needle position (left/right)
[Standard]
The clearance between the needle and the needle plate hole in the front/back direction should be more than 0.3 mm.
And the needle bar case unit should move smoothly when the change box gear is rotated.
[Adjustment]
1. Start the test mode and select [#10: Needle position] under [MAIN
BOARD TEST MODE].
2. Press the [L-R position] and the standard needle bar for adjustment
will be selected automatically. The needle bar case unit will move to
the left and right.
3. Turn the pulley by hand and lower the needle bar until the needle tip
enters the needle eye of the needle plate.
4. Remove the 2 screws 1 to remove the change box center cover.
5. Loosen the 2 screws 2 of the change box.
6. Move the change box to either the left or right to adjust the needle left/
right position.
7. Tighten the 2 screws 2 of the change box temporary.
8. Check the left/right (needle position) for all other needle bars using
these same steps.
9. Secure the change box in place such that it is positioned parallel to the
needle bar case unit by tightening the 2 screws 2 of the change box
securely.
*Key point
• After securing the change box check to ensure that the needle
bar case unit moves smoothly by rotating the change box gear
which in turn rotates the cam.
10. Attach the 2 screws 1 to secure the cover of the change box center cover.
12
Screw, Bind
M4X8
BOLT. (S/P WASHER)
M5X16
Needle tip
Needle plate
Change box
more than 0.3 mm
2
1
more than 0.3 mm
Cam
Change box center cover
Needle bar
case unit
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