DURKOPP ADLER 650-16 Operating Instructions Manual page 142

140
Meaning Possible causes
Loose stitches • Thread tensions are not
adjusted to the sewing
material, the sewing
material thickness or
the thread used
• The needle and hook
threads are not threaded
correctly
Needle • Needle thickness is
breakage unsuitable for the sew-
ing material or the thread
Seam • Residual tension is too
beginning tight for the needle
not secure thread
Remedial action
• Check thread tensions
• Check threading path
• Use recommended nee-
• Adjust residual tension
Operating Instructions 650-16 - 02.0 - 08/2016
Troubleshooting
 p. 23
dle