DURKOPP ADLER 581 Operating Instructions Manual page 174

172
Meaning Possible causes
Missing • The needle and looper
threads are not threaded
stitches
correctly
• Needle is blunt or bent
• Needle is not inserted
correctly into the needle bar
• The needle thickness used is
unsuitable
• Reel stand is incorrectly fitted • Check reel stand
• Thread tensions are too tight • Check thread tensions
• Sewing material is not held
correctly
• Sewing material is not
spread or is insufficiently
spread
• The loop stroke was not
corrected when changing the
zigzag stitch width
• Incorrect parts used for the
desired sewing equipment
• The looper or spreader is
misaligned
• Throat plate, looper or
spreader have been
damaged by the needle
Remedial action
• Check threading path
• Replace the needle
• Insert the needle into the
needle bar
• Use recommended
needle thickness

(
• Check the clamping
pressure ( Service
Instructions)
• Check the spread
( Service Instructions)
• Set the looping stroke
( Service Instructions)
• Check the parts based on
the equipment sheet
• Check individual settings
• Have parts reworked by
qualified specialists
Operating Instructions 581 - 01.0 - 05/2016
Troubleshooting
p. 175)