-61-
32.
NEEDLE THREADER
(CHECKING THE HOOK POSITION IN THE HORIZONTAL DIRECTION)
STANDARD
Needle threading should be possible when the needle holder bottom surface and hook holder bottom surface
height have been aligned.
* Left-right direction relative to the needle hole
The hook left-right direction reference position should be at the needle hole center. (The clearance between the
hook and the left and right of the needle hole should be the same.)
* Up-down direction relative to the needle hole
The clearance between the hook and top end of the needle hole should be 0-0.1 mm.
ADJUSTMENT
1.
Turn the balance wheel and adjust to the needle holder bottom surface and hook holder bottom surface
height. (Use eight #11 or #14 needle.)
2.
Loosen the two screws securing the needle threader base.
3.
Move the needle threader base left and right and adjust so that the hook comes to the center of the needle
hole, then tighten the two screws securing the needle threader base.
4.
Loosen the screw securing the positioning support.
5.
Adjust the positioning support up and down so that the clearance between the hook and the top end of the
needle hole is 0-0.1 mm.
6.
Check that the threader positioning and needle bar base are parallel, then tighten the screw securing the
positioning support.
*
If the threader positioning and needle bar base are not parallel, the threader positioning can contact of the
needle bar base and break the threader.
Screw securing positioning
Positioning support
Needle
hole
Needle bar base
Parallel
Threader positioning
Align
Needle holder
Needle bar base
Hook holder
Screw securing threader base
Threader base
Threader positioning
Top end of
needle hole
0-0.1 mm
Center of needle hole
Hook
