Errors In Sewing Process - DURKOPP ADLER 171 Operating Instructions Manual

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10.2 Errors in sewing process

Error Possible causes
Unthreading Needle thread tension is
at seam too firm
beginning
Thread Needle thread and looper
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, looper or
spread have been
damaged by the needle
Remedial action
Check needle thread
tension
Check threading path
Replace the needle
Insert the needle correctly
into the needle bar
Use recommended thread
Check thread tensions
Check threading path
Have parts reworked by
qualified specialists
Operating Instructions 171/173 - 02.0 - 09/2019
Troubleshooting