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Troubleshooting
142
Service Instructions 911-210-10 - 00.0 - 06/2020
20.3 Errors in sewing process
Error
Possible causes
Remedial action
Unthreading at seam
beginning
Needle thread tension is
too firm
Check needle thread tension
Thread breaking
Needle thread and hook
thread have not been
threaded correctly
Check threading path
Needle is bent or sharp-
edged
Replace needle
Needle is not inserted
correctly into the needle
bar
Insert the needle correctly into
the needle bar
The thread used is
unsuitable
Use recommended thread
Thread tensions are too
tight for the thread used
Check thread tensions
Thread-guiding parts, such
as thread tube, thread
guide or thread take-up
disk, are sharp-edged
Check threading path
Throat plate, hook or
spread have been
damaged by the needle
Have parts reworked by qualified
specialists
Skip stitches
Needle thread and hook
thread have not been
threaded correctly
Check threading path
Needle is blunt or bent
Replace needle
Needle is not inserted
correctly into the needle
bar
Insert the needle correctly into
the needle bar
The needle thickness used
is unsuitable
Use recommended needle
thickness
The reel stand is
assembled incorrectly
Check the assembly of the reel
stand
Thread tensions are too
tight
Check thread tensions
Throat plate, hook or
spread have been
damaged by the needle
Have parts reworked by qualified
specialists
Содержание 991-210-10 Series
Страница 1: ...911 210 10 Service Instructions...
Страница 10: ...About these instructions 8 Service Instructions 911 210 10 00 0 06 2020...
Страница 136: ...Decommissioning 134 Service Instructions 911 210 10 00 0 06 2020...
Страница 138: ...Disposal 136 Service Instructions 911 210 10 00 0 06 2020...
Страница 146: ...Troubleshooting 144 Service Instructions 911 210 10 00 0 06 2020...
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