Originally Posted by
QuiltingVagabond
Did you make sure the stop motion knob is in the sewing position? It is the smaller knob/wheel in the center of the handwheel, used to disengage the needle while bobbin winding.
This was my guess. The smaller knob goes one way and the handwheel goes the other. Don't over tighten it. I can't remember off the top of my head which way each goes, it would be in the manual that is linked above.