JUKI MOL-254 Engineer's Manual page 43

Adjustment Procedures
Far side :
The position has been factory-adjusted at the time of delivery
since it is used as reference when assembling the relevant
components. If it should be out of the correct position, re-
adjustment has to be carried out taking the following
procedure.
1) Perform the adjustment with the Y direction key of X-Y
origin compensation on the operation box panel.
This side :
When performing the Y direction origin compensation for
adjusting the position on far side, the position on this side is
surely shifted. Perform re-adjustment.
1) Make sure that the clearance provided between needles
is the sewing size used and adjust the clearance if
necessary.
Loosen setscrew to adjust it.
2) Loosen two setscrews
base and adjust so that the needles is placed in the direct
side-to-side center in the slit on the presser foot.
(Caution) Be sure to adjust the timing of the hook on
this side when the needle gauge is changed.
in the front presser foot installing
36
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Results of Improper Adjustment
If the clearances provided between
the cloth presser foot and the needle
are not equal, thread breakage or
needle breakage will result.