Service manual

Revised 11/2010
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S-105
1-34
D - MACHINE ADJUSTMENT
8.1. The position of spreaders is controlled by stoppers . The right spreader
Ó
Ó
Ó Ó
Ó needs to be adjusted to the
edge of the right looper
ÒÒ
ÒÒ
Ò , the left spreader
with its groove to the opening of the left looper
Ï
Ï
ÏÏ
Ï. Loosen
the screws
to change the set up with adjustments of stoppers . The stoppers also define the axial
play of the spreaders; after their adjustment, they must not hang.
8.2. Spreaders set up, to achieve correct operation of the left and right looper Ó,
is done after loosing the
nut
and adjusting the tail of the draw bar b
y turning it. Adjust the right looper so that it is in the
home position at the moment of being back in the bottom dead point. This is the key point for spreding
of the left spreader. It is important that the distance between the needle and the spreader is same for
both spreaders.
WARNING: Check the play between loopers and spreaders. It must be as small as possible:
Right - 0,05mm at the most, so that sewing thread cannot slide in between the right loopet and spreader.
Left - 0,1mm minimum, so that sewing thread cannot slide in between the left loopet and spreader.
Check the play between the needle Ð and the supporting steady
. Adjust the steady by bending it to the play
of 0,05mm. Once the stitching plate is fitted in, check the play between the needle
Ð and the stitching plate
.
8. SPREADERS ADJUSTMENT
According used thread