JUKI MOL-254 Engineer's Manual page 61

Adjustment Procedures
1) Turn OFF the power to the machine and expel air from
the machine while the sewing machine is being actually
engaged in sewing.
(Bring the needle to its stop position by turning the
handwheel by hand.)
2) Pull out the wiper by hand and make sure of the relation
of position with the thread.
3) Far side : Loosen setscrews
direction, and loosen setscrews
longitudinal direction.
4) This side : Loosen setscrews
and longitudinal directions.
5) Protruding amount of wiper : Loosen setscrew
adjust the amount for both front and far sides by taking in
or out the wiper.
and adjust the vertical
and adjust the
and adjust both vertical
Fig. 3
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Results of Improper Adjustment
and