DURKOPP ADLER 650-10 Operating Instructions Manual page 158

156
Meaning Possible causes
Missing stit- • The needle and hook
ches threads are not threaded
correctly
• Needle is blunt or bent
• Needle is not inserted
correctly into the needle
bar
• The needle thickness
used is unsuitable
• The thread reel holder is
installed incorrectly
• Thread tensions are too
tight
• Sewing material is not
held correctly
• The loop stroke was not
corrected when changing
the zigzag stitch width
• Incorrect parts used for
the desired sewing
equipment
• Throat plate, hook or
spread have been dama-
ged by the needle
Remedial action
• Check threading path
• Replace the needle
• Insert the needle into the
• Use recommended
• Check thread reel holder
• Check thread tensions
• Check clamping pressure
• Adjust the loop stroke
• Check the parts based
• Have parts reworked by
Operating Instructions 650-10 - 03.0 - 08/2016
Troubleshooting
( Operating Instruc-
tions, Operation)
needle bar
needle thickness

( S. 159)
( Operating Instruc-
tions, Operation)
( Operating Instruc-
tions, Operation)
( Service Instructions)
( Service Instructions)
on the equipment sheet
qualified specialists