Blade Exchange And Adjustment - SunStar SC 7900-Series User Manual

11) BLADE EXCHANGE AND ADJUSTMENT

(1) Knife (upper) pressure
When the needle bar is at the lowest point and the
knife(upper) is the very left, the presser foot is attached to
the needle plate and the knife(upper)
blade .
The standard clearance between the knife holder guide
and the knife holder shaft support bar
Tighten the knife holder guide clamp screw
the knife holder guide
clamp screw .
(2) Knife removal
Remove the knife(upper)
guide clamp screw
Remove the lower blade
holder clamp screw .
(3) Knife reinstallation
Fix the replacement lower blade
holder clamp screw
the knife holder screw
OVERLAP WIDTH ADJUSTMENT OF UPPER
SEWING MACHINE")
Adjust the knife holder guide
knife(upper) pressure.
is near the lower
is 1mm.
after adjusting
by loosening the knife holder guide
by loosening the knife holder
and the knife clamp screw .
by loosening the lower blade
with the lower blade
and fix the knife(upper)
. (Refer to the "6-11)
referring to the above
with
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