Unicorn LS2-H520, Руководство по эксплуатации

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Problem Cause Check Solution Page
Needle
breakage
Improper needle
installation
Needle facing,
height
Reinstall needle. 4
Bent needle
Blunt needle tip
jammed eye
Needle Replace needle 4
Improper feed timing _ Adjust feed timing. 16
Improper needle to
rotary hook timing
Needle bar stroke
Adjust needle to
rotary hook timing.
15
Needle bar height
Adjust needle to
rotary hook timing.
15
Needle to rotary
hook gap
Adjust needle to
rotary hook timing.
15
Thread wiper too high
Thread wiper
position Adjust thread wiper
position with screw.
Thread
breakage
Improper threading Threading Rethread. 4
Bent needle
Blunt needle tip
jammed eye
Needle Replace needle 4
Improper needle
installation
Needle facing,
height
Reinstall needle. 4
Excessive needle
thread tension
Needle thread
tension
Adjust needle
thread tension.
6
Excessive bobbin
thread tension Bobbin thread
tension Adjust bobbin
thread tension.
6
Loose needle thread
Thread take-up
spring operation Adjust thread
take-up spring.
6
Insufficient rotary hook
lubrication
Oil supply Adjust oil supply. 2
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