Errors In Sewing Process - Dürkopp Adler 867-M PREMIUM Service Instructions Manual

24.2 Errors in sewing process

Error
Unthreading at seam
beginning
Thread breaking
Missing stitches
158
Possible causes
Needle thread tension is too
firm
Needle thread and hook
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
Needle thread and hook
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 Check thread tensions
Throat plate, hook or spread
have been damaged by the
needle
Service Instructions 867-M PREMIUM - 03.0 - 05/2017
Troubleshooting
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
Check threading path
Replace the needle
Insert the needle correctly into the
needle bar
Use recommended needle
thickness
Check the assembly of the reel
stand
Have parts reworked by qualified
specialists