Dürkopp Adler 650-10 Service Instructions Manual page 129

Troubleshooting
Meaning
Loose Stitches • Thread tensions are not
Needle
Breakage
Seam
beginning not
secure
Service Instructions 650-10 - 01.0 - 08/2016
Possible causes
adjusted to the sewing material,
the sewing material thickness or
the thread used
• The needle and hook threads
are not threaded correctly
• Needle thickness is unsuitable
for the sewing material or the
thread
• Residual tension is too tight for
the needle thread
Remedial action
• Check thread tensions
• Check threading path
( Operating Instructions,
Operation)
• Use recommended needle
• Adjust residual tension
127