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9
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STITCH FORMATION
9-1 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 17.5mm (see the illustration).
Adjust the height of the thread guides by loosening
screws A and moving each thread guide 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.
9-2 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.
9-3 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.
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B
B
L
L
X
X
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