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1. Mounting position of needle thread adjusting path
(1) Mount the needle thread path guide , and tighten the setscrew
.
(2) Mount the needle thread adjusting path in the needle thread path
guide .
Measure the standard dimension (27mm) and tighten the setscrew
.
o Raising the needle thread adjusting path causes the needle thread
to be loosened.
o Lowering the needle thread adjusting path causes the needle
thread to be tightened.
2. Mounting position for the rocking thread take-up lever thread path
(1) When the needle bar is positioned at the upper dead point, vertically
hold the rocking thread take-up lever thread path and measure
the standard dimension (15mm). Tighten the setscrew .
3. Mounting position of needle thread guide adjuster
(1) Let the lever thread path stay at the lower dead point.
(2) Loosen two setscrews of the needle thread holding adjuster
and move the needle thread holding adjuster vertically. Measure
the standard dimension (1.5mm) and fasten two setscrews .
o Lowering the needle thread holder adjusting pin causes the needle
thread loop to be enlarged.
o Lowering the needle thread holder adjusting pin causes the needle
thread loop to be diminished.
(Caution) When the two setscrews are loosened and the needle
thread holding adjuster is moved vertically, it is
possible to change the height of "G" and that of "H."
o If there is no coincidence between
position of each thread path /
and that of the needle thread
holding adjuster , this can be a
cause of problems such as stitch
skipping, thread breakage, and
worse tightening of the needle
thread.
Adjustment Procedures Results of Improper Adjustment
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