Brother CS9100 Operation Manual page 21

d Fully lower the needle threader lever.
The end of the needle threader rotates
toward you and the hook passes
through the eye of the needle.
e Catch the thread on the hook as shown below.
a Hook
b Thread
f While lightly holding the thread, release the
needle threader lever. The hook will pull the
thread through the needle.
g Pull out about 5 cm (2 inch) of thread through
the needle toward the back of the sewing
machine.
a 5 cm (2 inch)
Note
● If you incorrectly feed the thread you may
cause sewing problems.
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