14
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9
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STITCH FORMATION
9999----1 Position of the needle thread guides
1 Position of the needle thread guides
1 Position of the needle thread guides
1 Position of the needle thread guides
The distance from the center of the eyelet of the needle
thread guide to that of the set screw should be
approximately 25mm (see the illustration).
Adjust the height of the thread guides by loosening
screws A and moving thread eyelet B up or down (refer
to the distances shown in the illustration).
If the stitch formation cannot be changed extremely by
adjusting the height of the thread guides because of the
thread to be used, unravel the thread after test sewing
and adjust the height of the thread guides while
checking the tension of the needle thread.
9999----2 Position of the thread guide on the needle thread take
2 Position of the thread guide on the needle thread take
2 Position of the thread guide on the needle thread take
2 Position of the thread guide on the needle thread take----up
up
up
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 screw B to the
thread guide of needle thread take-up A should be
55mm.
To make this adjustment, loosen screws B and C.
To tighten the needle thread, move needle thread
take-up to Y. To loosen the needle thread, move
needle thread take-up to X.
9999----3 Timing of the needle thread
3 Timing of the needle thread
3 Timing of the needle thread
3 Timing of the needle thread take
take
take
take----up
up
up
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.
< 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.