Errors In The Sewing Process - Dürkopp Adler 52 i Series Operating Instructions Manual

102

13.2 Errors in the sewing process

Error Possible causes
Unthreading at Needle thread tension is
seam begin- too firm
ning
Thread break- Needle thread and hook
ing thread have not been
threaded correctly
Needle is bent or sharp-
edged
Needle is not inserted cor-
rectly into the needle bar
The thread used is unsuit-
able
Thread tensions are too
tight for the thread used
Thread-guiding parts are
sharp-edged
Throat plate or hook have
been damaged by the nee-
dle
Missing Needle thread and hook
stitches thread have not been
threaded correctly
Needle is blunt or bent
Needle is not inserted cor-
rectly into the needle bar
The needle strength used
is unsuitable
The reel stand is installed
incorrectly
Thread tensions are too
tight
Throat plate or hook have
been damaged by the nee-
dle
Operating Instructions 52Xi, 52Xi-75 - 00.0 - 10/2021
Troubleshooting
Remedial action
Check needle thread ten-
sion
Check the threading path
Replace the needle
Insert the needle correctly
into the needle bar
Use the recommended
thread
Check the thread tensions
Check the threading path
Have parts reworked by
qualified specialists
Check the threading path
Replace the needle
Insert the needle correctly
into the needle bar
Use the recommended
needle strength
Check the assembly of the
reel stand
Check the thread tensions
Have parts reworked by
qualified specialists