Mitsubishi Electric PLK-J10050RH, Technical Manual

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Frequent skip stitching
happens. Clearance between needle
and hook is too big. Adjust clearance between
needle and hook properly.
6-2-1
Timing of needle and hook is
not proper. Adjust position of needle and
hook properly.
6-2-3
Needle is bent. Change needle. 5-1
Needle is at wrong position. Fix position properly. 5-1
Presser foot position is not
proper.
Adjust presser foot position. 6-5
Presser foot up and down
timing is not proper. Adjust presser foot up and
down properly.
6-5
Trimming is not
functioned.
Fixed knife is dull.
Sharpen fixed knife or change
fixed knife.
-
Movable knife is dull.
Sharpen Movable knife or
change fixed knife.
-
Movable knife home position is
not proper. Adjust movable knife home
position.
7-5-1
Setting of trimming timing is
not proper
Adjust the trimming timing.
Operation
panel
section
Trimming setting is off. Turn trimming setting on.
Operation
panel
section
Stitch forming is loose.
Upper thread tension is too
loose.
Adjust upper thread tension. 5-10
Bobbin thread tension is too
loose.
Adjust bobbin thread tension. 5-9
Strength of thread take up
spring is inadequate. Adjust strength of thread take
up spring.
6-6-2
Presser foot position is not
proper. Adjust presser foot position
properly.
6-5