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10-2 Position of the thread guide on the needle thread take-up
When the needle bar is at the bottom of its stroke,
needle thread take-up bracket A should be level and
the distance from the center of the shaft to the
thread guide of needle thread take-up B should be
75mm. To make this adjustment, loosen screws C
and D. To tighten the needle thread, move needle
thread take-up to Y. To loosen the needle thread,
move needle thread take-up to X.
10-3 Timing of the needle thread take-up
The timing of the needle thread take-up in relation
to the up-and-down movement of the needles can be
adjusted. This timing is factory-set to synchronize
with the up-and-down movement of the needle bar.
10-4 Position of the needle thread guard
When the needle bar is at the bottom of its stroke,
the center of the eyelet of thread guide A should be
level with the top surface of needle thread guard B.
In addition, A should be parallel with B.
To adjust the height of needle thread guard B, loosen
screw C and move needle thread guard B up or down.
To tighten the needle thread, move up B.
To loosen the needle thread, move down B.
■
For cotton threads (non-stretchable threads)
Bring the needle thread guard 2.0mm below the
standard, or remove it. Loosen screw C and move
down the needle thread guard.
■
For woolly threads (stretchable threads)
Raise the needle thread guard as high as possible.
< Note >
The rod ball is factory-set at 5.5mm from the rear end
of the shaft. To make the needle thread loop small,
move the rod ball to the front.
To make the needle thread loop large, move the rod
ball to the back. Remove the rubber top plug.
Loosen the screw of (A) with a 5mm wrench.
Then move the rod ball to the front or back.
From the library of: Superior Sewing Machine & Supply LLC
