DURKOPP ADLER 581 Operating Instructions Manual page 186

184
Meaning Possible causes
Skip stitches • Needle thread and hook
thread have not been
threaded correctly
• Needle is blunt or bent
• Needle is not inserted
correctly into the needle
bar
• The needle thickness
used is unsuitable
• The reel stand is
assembled incorrectly
• Thread tensions are too
tight
• Sewing material is not
held correctly
• Sewing material is not
spread or is insufficiently
spread
• The looping stroke was
not corrected when
changing the zigzag
stitch width
• Incorrect parts used for
the desired sewing
equipment
• Hook or spread have
shifted
• Throat plate, hook or
spread have been
damaged by the needle
Remedial action
• Check threading path
• Replace needle
• Insert the needle into the
needle bar
• Use recommended
needle thickness

• Check reel stand
• Check thread tensions
• Check clamping
pressure ( Service
Instructions)
• Check the spread
( Service Instructions)
• Adjust the looping stroke
( Service Instructions)
• Check the parts based
on the equipment sheet
• Check individual
adjustments
• Have parts reworked by
qualified specialists
Operating Instructions 581 - 02.0 - 05/2019
Troubleshooting
p. 187