Errors In Sewing Process - DURKOPP ADLER 670 Operating Instructions Manual

Troubleshooting
Operating Instructions 670/680 - 00.0 - 01/2017

10.3 Errors in sewing process

Error Possible cause
Unthreading Needle thread tension is
at seam too firm
beginning
Thread Needle thread and hook
breaking thread have not been
threaded correctly
Needle is
• bent
• sharp-edged
• not properly inserted
Yarn is
• knobby
• hard
• too thick
Thread tension is set too
firm
Thread-guiding parts are
sharp-edged
Throat plate or hook has
been damaged by the
needle
Remedial action
Check pretension  p. 27
Check threading path of
needle thread  p. 20
and hook thread  p. 24
Insert new needle  p. 18
Use recommended yarn
Check thread tension
 p. 26
Check the thread path
Have parts replaced
93