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Adjustment Procedures
1. Adjustment of bobbin thread cam
1) Open the center top cover
the cam thread path base
2) Turn the pulley
bobbin thread cam setscrew
setscrew
of the pully
If the bobbin thread cam setscrew
two setscrews
and
and backward for adjustment. Then, tighten the setscrew
Subsequently, tighten another setscrew
(Caution) At the time of bobbin thread cam
not move the bobbin thread cam
If it is moved to the right and left, the bobbin thread
cam
may come in contact with the right/left side face
of the cam thread path base
3) Install the cam thread path base
right and left faces of the bobbin thread cam
setscrew
.
(Caution) The bobbin thread cam
peep window. However, since the inside is dark, a proper
light (pen light or the like) should be used during
adjustments.
, loosen the setscrew
.
counterclockwise and confirm whether the first
stays on the same line with the first
.
seems to be displaced, loosen
and turn the bobbin thread cam
so that it does not touch the
can be adjusted through the
, and remove
forward
.
.
adjustments, do
to the right and left.
groove.
. Then, tighten the
– 41 –
Results of Improper Adjustment
o If the standard position is not
secured for the bobbin thread cam
, this can be a cause of stitch
skipping.
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