Dürkopp Adler 650-16, Operating Instructions Manual

Page: 141 / 150

Troubleshooting
Operating Instructions 650-16 - 02.0 - 08/2016 139
Missing
stitches • The needle and hook
threads are not threaded
correctly
• Check threading path

p. 23
• Needle is blunt or bent
• Needle is not inserted
correctly into the needle
bar
• Replace the needle
• Insert the needle into the
needle bar
• The needle thickness
used is unsuitable
• Use recommended nee-
dle thickness

p. 141
• The thread reel holder is
installed incorrectly
• Check thread reel holder
• Thread tensions are too
tight
• Check thread tensions

p. 23
• Sewing material is not
held correctly
• Check clamping pressure
(

Service Instructions)
• The loop stroke was not
corrected when changing
the zigzag stitch width
• Adjust the loop stroke
(

Service Instructions)
• Incorrect parts used for
the desired sewing
equipment
• Check the parts based
on the equipment sheet
• Throat plate, hook or
spread have been dam-
aged by the needle
• Have parts reworked by
qualified specialists
Meaning Possible causes Remedial action