DURKOPP ADLER 906 Operating Instructions Manual page 132

Error
Loose stitches
Needle breakage
130
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
Operating Instructions 906 - 02.0 - 11/2016
Troubleshooting
Remedial action
Check thread tensions
Check threading path
Use recommended needle
thickness  p. 131