Duerkopp Adler 869-M PREMIUM Operating Instructions Manual page 158

156
Error Possible causes
Missing Needle thread and hook
stitches 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 installed
incorrectly
Thread tensions are too
tight
Throat plate or hook have
been damaged by the
needle
Distance from the hook to
the needle is not set
correctly
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
Needle Needle thickness is
breakage unsuitable for the sewing
material or the thread
Operating Instructions 868-M PREMIUM - 02.0 - 01/2018
Troubleshooting
Remedial action
Check threading path
( p. 26,  p. 40).
Replace the needle
( p. 22).
Insert the needle correctly
into the needle bar
( p. 22).
Use recommended needle
thickness ( p. 157).
Check the assembly of the
reel stand
Check thread tensions
( p. 42).
Have parts reworked by
qualified specialists
Set the correct distance
( Service Instructions)
Check thread tensions
( p. 42).
Check threading path
( p. 26,  p. 40).
Use recommended needle
thickness ( p. 157).