SunStar SC 7900-Series, Руководство пользователя

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41
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) is near the lower
blade .
The standard clearance between the knife holder guide
and the knife holder shaft support bar
is 1mm.
Tighten the knife holder guide clamp screw after adjusting
the knife holder guide by loosening the knife holder guide
clamp screw .
(2) Knife removal
Remove the knife(upper) by loosening the knife holder
guide clamp screw and the knife clamp screw .
Remove the lower blade by loosening the lower blade
holder clamp screw .
(3) Knife reinstallation
Fix the replacement lower blade with the lower blade
holder clamp screw and fix the knife(upper) with
the knife holder screw . (Refer to the “6-11)
OVERLAP WIDTH ADJUSTMENT OF UPPER
SEWING MACHINE”)
Adjust the knife holder guide
referring to the above
knife(upper) pressure.