Singer sewing machine bobbin case keeps moving causing the needle to break.
Is this a front loading bobbin or top? If it is a vertical front loader with the little metal bobbin case, the metal case has to be lined up and snapped firmly into place. You should hear it snap and lock into place.
If it\'s a horizontal or top loading bobbin, and the plastic bobbin "tray" is rotating, then it may not have been nested in properly, before replacing the plate, or may be "jagged" somewhere... If there is a burr on the casing, or as in the case of one machine I worked on, still have a piece of needle stuck in it, the thread will snag on it before it finishes rotating and the rotating motion catches half way and will jerk the case right around and the next stitch will break the new needle.. Those plastic bobbin "trays" are usually easy to find and replace if they have become too burred to use. I have also sanded them smooth again as well though.
To test it, unplug the machine, thread your machine on top, but leave off your bobbin lid and leave out your bobbin, hold the top thread (like when you are about to crank to pull up a bobbin loop) and hand crank toward you, or counter-clockwise one complete rotation. Watch to see if the top thread is caught by the rotation hook and slips all the way around and back over the top of the bobbin tray, or if it snags on it somewhere.... Good luck!
Jan 15, 2014 |
Singer Sewing Machines