Machine just locked up, no obvious thread/needle issues, can't find answers in book...safety function on, Help! Someone said take bottom off and look for thread? Only used it a few times, but out of w
Can you turn the hand wheel at all ? If not, something is jammed tight somewhere.
Have you removed the bobbin from the bobbin case and cleaned thoroughly around it, removing all lint, dust, loose thread bits ?
If that does not help, can you try taking apart the shuttle assembly, which the bobbin fits into ?
Sometimes you may get thread wound around in these parts and it causes a jam. Please, observe how the parts of the shuttle assembly fit together so you know how to put it back together. There may be a small lever or pair of levers that must be moved to allow the parts to be pulled out. There aren't many, usually two or three pieces.
It's very useful to snap pics.. of it the way it looks before you touch it, and then each step as you take it apart, so you have a guide to putting it back.
It's also possible a gear is jammed. Most machines allow you to remove the upper casing and bottom casing. You'd have to take out some screws to do this. If anything is jammed between gears that you can see, remove it carefully. If you have to use a tool to pull out something jammed, take care not to damage the gear teeth, as that's a big repair job and often not worth the expense compared to buying another machine, sadly.
on Mar 04, 2015