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Adjustment Procedures
Results of Improper Adjustment
1) Stroke position adjustment of drive sleeve
When the head of the link setscrew
comes closest to the rear face
of the needle clamp
, loosen the setscrew
of the driving sleeve
lever
and move the driving sleeve
to the right and left to secure
the standard clearance of 2mm. Since then, tighten the setscrew
.
When the driving sleeve
is moved to the right and left as seen
from behind, the clearance becomes as follows:
o The clearance is narrowed when the driving sleeve
is moved left-
ward.
o The clearance is widened when the driving sleeve
is moved right-
ward.
(Caution) When the setscrew
is loosened, the driving sleeve
is lowered and a vertical clearance may be developed.
Tighten the setscrew after confirming that there is no
clearance after adjustments.
2) Amount of fancy thread carrier injection
Loosen the setscrew
and move the fancy thread carrier
for-
ward and backward to adjust the injection size to 3.5mm. Since then,
tighten the setscrew
.
o If position adjustment is incorrect,
this can be a cause of fancy stitch
skipping, needle breakage, or de-
struction of parts.
o This can be the cause of needle
breakage or stitch skipping.
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
