Motor needed the motor on my machine has stopped working, it blew up whilst trying to fill a bobbin, well made a popping noise and emitted smoke then stopped working. Although it is 30 yrs old, it has been used infrequently so is still in excellent condition.

SOURCE: bobbin thread gets bunched up and loud clicking sound

The problem is never the bobbin when you have this problem. It's the top thread. Take the thread off the top of the machine and rethread the top. Make sure the small tension dial is on 4 or 5 (the larger dial on the front left is for the pressure on the foot, not the thread tension.) After you thread the machine, put the pressure foot down but NOT on the thread. Then pull gently toward the back of the machine. When you do, the needle should bend slightly backwards before the thread comes through the machine. If it pulls with no resistance you could simply have "fluff" or remants of thread between your tension discs. If you do, put the dial on zero and using an old needle, clean between the discs and try threading the machine again with the "pull test" I described earlier.
No tension on the top of the machine, lets the bobbin tension win and it pulls all the thread to the bottom of the fabric.

SOURCE: Just bought machine, new needle, thread, Needle

try sewusa loads of manuals and sewing diagrams. Since its a older machine.I would clean and oil it also.Lint can cause all kinds of issues.

SOURCE: Kenmore 158.1703 sewing machine - needle not going up and down

The machine sounds like it has threads caught in the bobbin area thus locking the machine up. Check in there and maybe you can pick them out with tweezers. They may need to be 'softened up' with a little oil before you can get them out!. also Please push the bobbin winder back to the left position and it will release the bobbin winder. Then you should be able to sew. If the needle won't move, you will need to tighten the turning wheel on the right side end of the machine. This should move your needle. Then you should be set to sew.
------This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya

SOURCE: I need a Bernina 830 foot pedal. The machine is

You can fit any foot control providing you only have two leads coming from the control, you should be able to get a replacement Bernina control on www.sewingonline.co.uk/instructions

SOURCE: My machine will not thread any bobbins.

Your bobbin winder has seized. Remove the top cover and oil the area where the bobbin winder shaft goes through the bobbin winder assembly. You might need to force the winder to turn with your fingers for a while, but it will begin to turn smoothly once the oil gets in there.

If the black bobbin winder tire has a flat spot worn into it, you will need a new bobbin winder tire. Costs around a dollar.