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5-18 Automatic thread trimming
Changing the thread trimming knife
1. Remove the throat plate.
2. Remove the setscrew of the thread trimming knife cover. Remove the thread trimming knife cover,
the thread trimmer grasping unit and the thread trimming knife.
3. Reversing the disassembly procedure, assemble the parts. (Refer to the Caution below.)
Caution: When assembling the thread trimmer grasping unit, put its pin into the slit in the thread trimmer link
at the lower side of the mechanism section as illustrated below.
Setscrew of the thread trimming
blade cover
Thread trimming blade cover
Thread trimmer grasping unit
Thread trimming blade
Thread trimming cannot be performed
if the pin has not entered the slit.
Put the pin of the thread grasping unit
into the slit of the thread trimmer link.
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