Troubleshooting
Operating Instructions 581 - 01.0 - 05/2016172
Missing
stitches
• The needle and looper
threads are not threaded
correctly
• Check threading path
• Needle is blunt or bent
• Needle is not inserted
cor
rectly into the needle bar
• Replace the needle
• Insert the needle into the
needle bar
• The needle thickness used is
unsuit
able
• Use recommended
needle thickness
(
p. 175)
• Reel stand is incorrectly fitted • Check reel stand
• Thread tensions are too tight • Check thread tensions
• Sewing material is not held
correctly
• Check the clamping
pr
essure ( Service
Instr
uctions)
• Sewing material is not
spread
or is insufficiently
spread
• Check the spread
( Service Instructions)
• The loop stroke was not
cor
rected when changing the
zigzag stitch width
• Set the looping stroke
( Service Instructions)
• Incorrect parts used for the
de
sired sewing equipment
• Check the parts based on
the equipment sheet
• The looper or spreader is
misaligned
• Check individual settings
• Throat plate, looper or
sp
reader have been
damaged by the needle
• Have parts reworked by
qualified specialists
Meaning Possible causes Remedial action
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