Janome Memory Craft 6650 Instruction Book page 21

Bobbin winding while working on a sewing project
There are 2 spool pins on the spool stand.
You can use both spool pins when you need to wind a
bobbin without unthreading the machine while working on
a sewing project.
Place a spool of thread on the spool pin and fix the spool
with the spool holder as shown.
NOTE:
Those spool pins are also used for twin needle sewing
(refer to page 79).
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