Dürkopp Adler 52 i Series Service Instructions Manual page 80

Error
Loose stitches
Needle breakage
78
Possible causes
Thread tensions are not
adjusted to the sewing
material, the sewing
material thickness or the
thread used
Needle thread and hook
thread have not been
threaded correctly
Needle strength is
unsuitable for the sewing
material or the thread
Service Instructions 52Xi, 52Xi-75 - 00.0 - 11/2021
Errors in the sewing process
Remedial action
Check the thread tensions
Check the threading path
Use the recommended needle
strength