On some machines there is a knob on the knob that you pull out to disable the needle so you can make a bobbin. Make sure the machine isn't set to make a bobbin.
My kenmore sewing machine is stuck! Like the needle won't go up or down! I've tried taking apart the bottom where the thread is but it didn't help. The knob won't work to move the needle. I don't know what's wrong with it?