DURKOPP ADLER 969 PURE Operating Instructions Manual page 77

Troubleshooting
Operating Instructions 969 PURE - 00.0 - 04/2020
Error Possible causes
Skip stitches Needle thread and hook
thread have not been
threaded correctly
Needle is blunt or bent
Needle is not inserted
correctly into the needle
bar
The needle thickness used
is unsuitable
The reel stand is
assembled incorrectly
Thread tensions are too
tight
Throat plate, hook or
spread have been
damaged by the needle
Loose stitches 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
Thread tensioning spring
not working
Needle Needle thickness is
breakage unsuitable for the sewing
material or the thread
Remedial action
Check threading path
Replace needle
Insert the needle correctly
into the needle bar
Use recommended needle
thickness
Check the assembly of
the reel stand
Check thread tensions
Have parts reworked by
qualified specialists
Check thread tensions
Check threading path
 Service Instructions
Use recommended needle
thickness
75