JUKI MB-1800 series, Руководство инженера

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Troubles Causes Corrective measures
(2) Cause of troubles and the corrective measures for MB-1800
1. The machine fails to sew at
the start of sewing.
Length of remaining thread is too
short. Adjust the thread adjusting thread
guide.
Speed is fast. Use the soft-start function.
The needle is too thick for the
diameter of the hole in the button.
Replace the needle with a thinner one.
The thread tension post No. 2 fails
to release the thread at correct
timing. Make the thread releasing timing
slightly earlier.
The needle does not enter the
center of the holes in the button. Adjust the position of the button clamp
jaw lever holder.
2. Thread breakage
The needle does not enter the
center of the holes in the button. Adjust athe position of the button
clamp jaw lever holder.
The thread tension post No. 2 fails
to release the thread at correct
timing. Make the thread releasing timing
slightly earlier.
The thread tension post No. 2 does
not give sufficient tension. Increase the tension of the thread
tension post No. 2.
3. Buttons are not sewn tightly.
The last stitch skips. Adjust the looper.
The moving knife does not separate
the thread on the fabric with its
thread separating claw. Adjust the position of the moving knife.
The needle does not enter the
center of the holes in the button. Adjust the position of the button clamp
jaw lever holder.
4. Thread cannot be trimmed.
The moving knife does not separate
the thread on the fabric with its
thread separating claw. Adjust the height of the thread
separating claw.
The moving knife does not separate
the thread on the fabric with its
thread separating claw.
Adjust the position of the moving knife.
The moving knife separation nail is
too high or too low. Adjust the height of the thread
separating claw.
5. Needle thread is cut in two
places.