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Troubleshooting
Error
Loose stitches
Needle breakage
Operating Instructions 911-210-10 - 00.0 - 06/2020
Possible causes
Thread tensions are not
adjusted to the sewing
material, the sewing
material thickness or the
thread used
Needle thread and hook
thread have not been
threaded correctly
Needle thickness is
unsuitable for the sewing
material or the thread
Remedial action
Check thread tensions
Check threading path
Use recommended needle
thickness
121
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