−20 −
Adjustment Procedures Results of Improper Adjustment
™ If the looper stroke is excessively
small, return of the looper is
retarded and defective stitching
will occur.
1. Loosen screw 1 and turn looper link eccentric pin 2 to change
the stroke of the looper.
2. The stroke is increased when the pin is near the shaft center
of looper link 3, and the stroke is decreased when the pin is
away from the shaft center of the link.
3. This procedure can be used for fine adjustment of the looper.
As a matter of course, however, the stroke of the looper
changes.
Adjustment Procedures Results of Improper Adjustment
1. Adjusting the loop
(1) The size of loop can be adjusted with thread take-up thread guide
(right) 1.
(2) For both MP-200NS and NL, the clearances between thread
take-up guide (right) 1, screw No. 4, and screw No. 5 are equal.
™ To increase the loop, adjust by lowering thread take-up thread
guide (right) 1.
™ To decrease the loop, adjust by raising thread take-up thread
guide (right) 1.
2. Adjusting the stitch tightness
(1) Stitch tightness condition of the right side (wrong side at the time
of sewing) of sewing product can be adjusted with thread take-
up thread guide (left) 2.
(2) MP-200NS : The clearances between thread take-up guide (left)
2, Screw No. 2 and screw No. 3 are vertically equal. (Standard
: 2.5 mm)
(3) MP-200NL : Adjust the clearance between the thread take-up
guide (left) and screw No. 4 to 4 mm.
™ When stitch tightness is weak, adjust by raising thread take-
up thread guide (left) 2.
™ When stitch tightness is strong, adjust by lowering thread
take-up thread guide (left) 2.
™ Good sewing condition may not
be obtained.
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