Errors In Sewing Process - DURKOPP ADLER 550-12-33 Operating Instructions Manual

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10.3 Errors in sewing process

Error Possible causes
Unthreading at Needle thread tension is
seam too 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 Thread-guiding parts, such
breaking as thread tube, thread
guide or thread take-up
disk, are sharp-edged
Throat plate, hook or
spread have been
damaged by the needle
Operating Instructions 550-12-33/34 - 00.0 - 08/2017
Troubleshooting
Remedial action
Check needle thread
tension
 p. 42
Check threading path
 p. 24 and  p. 27
Replace needle
 p. 22
Insert the needle correctly
into the needle bar
 p. 22
Use recommended thread
 p. 183
Check thread tensions
 p. 42
Check threading path
 p. 24 and  p. 27
Have parts reworked by
qualified specialists