ZOJE 5780BS, Operation Manual, Page: 29 / 60

size of presser.
2. Material flops because of light-weight.
3. Attaching needle is wrong.
4. Needle id bent.
5. There is a burr or scratch on the blade
point of hook.
one.
○ Delay the hook-to-needle timing.
（
Lower the needle bar by 0.5mm
） ；
○
Adjust again the direction, height,
etc.
○
Replace the needle.
○ Buff the blade top of hook. Or,
replace the hook.
19
14
14
—
8. Thread frays. 1. Number of stitches of the stitching is
too small.
2. Width of tie stitching is too wide.
○
Increase the number of stitches of
tie stitching at the end of sewing.
○ Narrow the width of tie stitching at
the end of sewing.
—
—
9. Length of needle
thread remaining at
the end of sewing
is too long.
1. Width of tie stitching is too narrow.
2. Tension of tie stitching is too low.
○ Widen the width of tie stitching at
the end of sewing.
○
Increase tension at the end of
sewing.
—
—
10. Needle thread
breaks at the start
of sewing, or the
wrong side of
seam is dirty.
1. Tension at the start of sewing is too low. ○ Increase tension at the start of
sewing.
—
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