How to wind bobbin

SOURCE: Bobbin won't wind

I have checked the gears underneath and see no missing teeth for the bobbin part. The bobbin "seat" does raise, but does not engage. Thanks

SOURCE: I have a Brother model

just wind the thread around the bobbin, don't put it through any holes, wind it around the center pole,

SOURCE: Singer Sewing Machine model 9224. Bobbin thread

If you turn the handwheel, can you see a metal ring rotating around the outer edge of the bobbin case? If not rotating, broken gear or timing belt off.
If that ring is turning, remove the needle plate and bobbin case. As this ring now rotates, you will a finger on the ring that will pass behind the needle from right to left and it should catch the thread from the eye of the needle. If this finger, the "hook" passes above the eye, you have a timing problem.

Let me know.

SOURCE: I have a singer Model #6234. The bobbin is wound

I have a singer Model 6234. and i wont the book to see how the operad