SunStar KM-2300, Руководство пользователя

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37
No Symptom Checkpoints Root cause Corrective action
Wrong needle insertion.
Insufficient crossing quantity of
movable and fixed blade.
Too strong upper thread tension.
Too thick a needle for thread.
Take-up lever pulls out the upper
thread because the needle up and
down position is too high.
Check the crossing of
trimmer cam notch
mark and blade
Check the Up-stop
position of needle
Trimming errors 6
Reinsert the needle correctly.
Adjust the strokes of movable and
fixed blades.
Adjust tension of upper thread.
Check thickness of needle.
Adjust the up-stop position of
needle.
7
Upper thread
is pulled out
when sewing
commences.
Too tight upper thread tension.
Too loose lower thread tension.
Too weak upper thread tension.
Too strong lower thread tension.
Reduce tension of upper thread.
Increase tension of lower thread.
Increase upper thread tension.
Decrease tension of lower thread.
Upper thread
does not sink.
Lower thread
does not sink.
4
5
Tension not aligned between
movable and fixed blades.
Abrasion in blade groove of
movable and fixed blades.
Direction of needle
Tension of fixed blade
Edge of movable and
fixed blades
Adjust tension of movable and fixed
blade.
Replace movable and fixed blades.