Sewing machine Singer Advance 7422, I try to fill a bobbin on the top of my machine. I put the bobbin in position and the shaft will not turn. The machine is treaded correctly and put in the right position. The shaft just will not spin to load.

SOURCE: Problem with winding thread onto

first you must make sure the winder shaft is turning by moving it to the right a little and see if you can turn it by hand.
If it is turning ok then there is a rubber ring on the other end of the winder shaft and it should come in contact with the drive which turnes it ,if it is worn it might need a new rubber.

SOURCE: Bobbin won't wind Singer 7422

Your problem lies with the main shaft that is to tight to release the bobbin winder mechanism, because of old grease and oil becoming sticky. A short term solution will be to remove the needle, in order not to hurt you, and then hold on to the needle bar with your left hand, while engaging the bobbin lever with your left hand. This will prevent the main shaft to rotate and your winder should work. In the long term, take it to your dealer to clean the oil and grease. You will not be able to open the machine casing yourselve, as you might damage the casing and or electronics.

Good luck!

SOURCE: singer quantum sewing machine won't pick up bobbin thread

Try changing your needle

SOURCE: on my old Singer 834, the bobbin thread puts out

Are you sure the bobbin thread is in the case correct. it also as tension support.Or is the bobbin thread right . When you make your bobbins that also should have tension.

SOURCE: bobbin case futura singer sewing machine came out

The opening fits on the right side, toward back. There is the silver ring with the slot in it for the bobbin. That slot is facing the sewer.