Service manual

1-54
S100
Revised 10/2005
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D - MACHINE ADJUSTMENT
25. KNIFE ADJUSTMENT FOR UPPER THREAD TRIM
1. After repeatedly mounted holder with
thread knife  loosening the knife travel nut
, set the thread trimming knife height to
reach the clearance 0.1 to 0.15 mm,
above the right side spreader .
2. The basic angle of set cutting knife
 adjust by scerw , so taht the left side
of the knife is covered with right side of the
throad plate .
3. The knife position , required for catching
the upper thread loop, can be changed after
loosening the screw , so that the knife
edge is 0,9 mm from the needle .
When the knife position is changed it is
necessary to check the height emendation to
preserve the clerance - see article 1.
4. The knife end position  is limited by stop
screw  so that the cutting knife  does
not toutch upper thread by itself tip.
5. The initial position of the control lever
adjust to the space in range 0,2---0,3 mm
from the stud by screw after loosen
ing its nut.