Troubleshooting
Operating Instructions 1767 - 00.0 - 12/2016 105
Missing stitches Needle thread and hook
thread have not been
threaded correctly
Check threading path
Needle is blunt or bent Replace the needle
Needle is not inserted
correctly into the needle
bar
Insert the needle correctly
into the needle bar
The needle thickness used
is unsuitable
Use recommended needle
thickness
The thread reel holder is
installed incorrectly
Check the assembly of the
thread reel holder
Thread tensions are too
tight
Check thread tensions
Throat plate, hook or
spread have been
damaged by the needle
Have parts reworked by
qualified specialists
Loose stitches Thread tensions are not
adjusted to the sewing
material, the sewing
material thickness or the
thread used
Check thread tensions
Needle thread and hook
thread have not been
threaded correctly
Check threading path
Needle
breakage
Needle thickness is
unsuitable for the sewing
material or the thread
Use recommended needle
thickness
Error Possible causes Remedial action