Errors In Sewing Process - Dürkopp Adler 868-M Operating Instructions Manual

146

10.3 Errors in sewing process

Error Possible causes
Unthreading at Needle thread tension is too
seam firm
beginning
Thread Needle thread and hook
breaking thread have not been
threaded correctly
Needle is bent or
sharp-edged
Needle is not inserted
correctly into the needle bar
The thread used is
unsuitable
Thread tensions are too
tight for the thread used
Thread-guiding parts, such
as thread tube, thread guide
or thread take-up disk, are
sharp-edged
Throat plate, hook or spread
have been damaged by the
needle
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 assembled
incorrectly
Thread tensions are too
tight
Throat plate, hook or spread
have been damaged by the
needle
Remedial action
Check needle thread
tension  p. 47
Check threading path
 p. 28
Replace the needle
 p. 24
Insert the needle correctly
into the needle bar  p. 24
Use recommended thread
 p. 149
Check thread tensions
 p. 47
Check threading path
 p. 28
Have parts reworked by
qualified specialists
 p. 137
Check threading path
 p. 28
Replace the needle
 p. 24
Insert the needle correctly
into the needle bar  p. 24
Use recommended needle
thickness  p. 149
Check the assembly of the
reel stand  p. 119
Check thread tensions
 p. 47
Have parts reworked by
qualified specialists
 p. 137
Operating Instructions 868-M - 01.0 - 12/2020
Troubleshooting