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54
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Troubles
Cause (1)
Cause (2)
Checking orders and corrective measures
From the previous page
Stitch skipping
Presser foot is defective.
Thread tension is defective.
Needle hole of throat plate is small.
Needle is thin for thread used.
Needle is defective.
Needle is defective.
Places related to the hook
Presser foot is rising.
Recess for thread on the rear side of
presser foot is not provided, or small.
Presser foot does not work especially when
the pitch is large, or thick thread is used.
Thread tension disk is rising.
There is a burr on the top end of needle.
Needle is bent.
Attaching direction of needle is improper.
Or, it is not inserted until it will go no further.
Top of needle is blunt.
Needle is too thin for the thread used.
Feed force is weak.
Top end of needle is blunt, or worn out.
Hook timing is defective.
Height of needle bar is improper.
Clearance between blade point of hook and
needle is improper.
Loop formation is unstable. (When net
material or the like is used.)
There is no needle guard.
Adjust the clearance between presser bar guide bracket and lifting
plate. (A clearance of 0.8 to 1 mm should be provided when the
presser foot comes closely in contact with the lifting plate.)
Use the presser foot with the large recess on the sole.
Adjust the timing of thread tension disk rising referring to the
item (3-8).
Use the throat plate with large needle hole.
Replace the needle or the thread used.
Replace the needle.
Replace the needle.
Re-attach the needle. Replace the needle clamp screw. Defective
stitching is apt to occur when attaching the needle with its indented
part facing to this side.
Replace the needle.
Replace the needle.
Raise the height of the feed dog.
Corrrect the blade point of the hook or replace the hook.
Readjust the timing (advance the timing when needle thread loop
can be easily formed, and delay the timing when needle thread
loop is hard to be formed in accordance with the conditions of
fabric and thread.
Adjust the height of needle bar in terms of the blade point of the
hook to upper or lower.
Decrease the clearance between the blade point and the needle.
Turn thread around the needle, or use T-type needle bar thread
guide (B1418227T00).
Replace the hook with one with needle guard.
For SS : 1141355, For DS : 22890404
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