JUKI LBH-1790 Instruction Manual page 59

Troubles
. Knfe drops even . Check whether the thread breakage detector
when needle thread
s cut.
2. Needle breaks. . Check whether needle s bent.
2. Check whether needle comes n contact wth
3. Check whether needle thread trmmer comes
4. Check whether needle comes n the center of
5. Needle stop poston s too low and needle
3. Knfe drops plural . Check whether the cloth cuttng knfe drop-
tmes.
Causes
plate s properly adjusted.
the blade pont of hook.
n contact wth needle when t opens.
the needle hole of throat plate.
comes n contact wth needle thread trmmer
when t closes.
png s set to plural droppng.
™ Adjust the detector plate.
(Refer to the Engneer's Manual.)
™ Replace the needle.
™ Adjust the needle-to-hook tmng.
™ Adjust the nstallng poston of needle
thread trmmer.
™ Re-adjust the nstallng poston of throat
plate base.
™ Release the plural tme settng.
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Correctve measures Page
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P.3
P.47
P.48
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P.4