Janome MC6600P Instruction Book page 9

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6 Thread cutter button
Press this button after finishing sewing and the machine will trim the
threads.
The LED signal blinks while cutting the threads.
7 Thread Cutter Signal
NOTES:
The auto thread cutter will work well with normal sewing threads #30 or
finer.
Use the thread cutter on the face plate to cut the specialized or thick
threads if the auto thread cutter does not work well.
When starting the next seam, pull the needle thread to pick the bobbin
thread up and draw them to the back and under the foot.
Clean the auto thread cutter mechanism regularly to avoid malfunction
due to built up lint.
Avoid using a paper cored spool when it begins to empty since it will not
unwind smoothly. It may cause the thread to bunch or slip when using
the auto thread cutter.
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