JUKI PS-800-8045 Instruction Manual page 51

Trouble
① Stitch skipping at the 1st stitch.
8. Thread end of the
1st stitch comes
② Needle used and thread used are thick
out on the right
side of the materi- in terms of the inner diameter of the
al. intermediate presser.
③ Intermediate presser is not properly
positioned in terms of the needle.
④ The direction of air blower is incorrect.
As a result, needle thread at the tip of
needle cannot be clamped with the disc
presser.
① The clearance provided between the
9. The needle thread
is entangled in the inner hook holder and the inner hook is
inner hook holder. too small.
① The bobbin runs idle excessively.
10. The knotting
section of bobbin
② Bobbin thread tension is too low.
thread at 2nd
③ The needle thread tension at 1st stitch is
stitch at the sew-
ing start appears too high.
on the right side.
Cause
◦ Increase the length of needle thread remaining at
◦ Change the current intermediate presser with
◦ Adjust the eccentricity between intermediate
◦ Adjust the air-blowing direction of the air blower
◦ Adjust the clearance provided between the inner
◦ Adjust the height of idling prevention spring of the
◦ Increase the bobbin thread tension.
◦ Decrease the needle thread tension at 1st stitch.
– 48 –
Corrective measures
the needle after thread trimming.
another one which has a larger inner diameter.
presser and needle so that needle enters in the
center of intermediate presser.
according to the direction of sewing so that the
needle thread at the tip of needle can be clamped
with the disc presser.
hook holder and the inner hook appropriately
according to the thickness of needle thread to be
used.
bobbin case appropriately.