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2-E) Thread take-up spring tension
Adjust the thread take-up spring.
is too low.
2-F) Length of the remaining
Properly adjust the tension controller No. 1.
needle thread is too long.
2-G)The specified inner hook and
Use the specified parts.
shuttle driver are not used.
4-3) Scratches on the shuttle driver.
Remove the scratches and polish with buff, or replace
the shuttle driver.
4-4) Clearance between the shuttle
Properly adjust the clearance between the shuttle
driver and the inner hook is too small.
driver and the inner hook.
4-5) Scratches on the needle hole
Remove the scratches and polish with buff, or replace
guide.
the needle hole guide.
4-6) Finish of the needle hole is rough.
Replace the needle.
4-7) Thread take-up spring is
7-A) Stroke of the thread take-up
Properly adjust the thread take-up spring.
maladjusted.
spring is too large.
7-B) Thread take-up spring tension
Properly adjust the thread take-up spring.
is too high.
4-8) Rotation of the inner hook is
8-A) Race face of the shuttle is
Remove the inner hook and remove the thread waste.
defective.
clogged with thread waste.
8-B) Oil amount is insufficient.
Supply oil to the shuttle components.
4-9) Needle thread clamp device
9-A) Needle thread length is
Adjust the needle thread length and turn the needle
OFF
inadequate.
thread clamp device ON.
4-10) Chemical fiber thread is
Use of silicone oil
melted with heat from the
needle.
Use of needle coated with fluoro carbon resin
Trouble
Cause (1)
Cause (2)
Check and corrective measures
From the previous page
From the previous page
