May be the timing. BUT FIRST! Unthread, remove throat plate and pressure foot. Gently but thouroughly clean out area revealed, and the bobbin chase. Oil per manual's instructions. Manually turn hand crank, check for smooth operation.
If this does not fix the problem it will need to go to the shop for a basic check up (unless you are mecialically/electronically inclined).. They will reset it to the factory specs which should fix your problems.
SOURCE: bobbin case case keeps jamming
I am having somewhat the same problem with the exception that my needle did not break. I've cleaned and oil, but the bobbin case and projection positioned spring is not communicating to allow sewing to continue. The thread keeps jamming and the bobbin raises up the plate. So, what else am I to do?
SOURCE: while sewing the bobbin case moves, wheel locks up, needle locks
Im not sure if this will help but thought I would pass it along. My Pfaff 6122 tells me to check bobbin for thread unrolling clockwise before you place it back in the machine. I had mine turned to un roll counter clockwise, this is wrong, the bobbin will fall out when you pull on the thread while you are holding it in your hand. You may just keep putting it in backwards. Hope this works for you. J.R.
SOURCE: Needle hitting bobbin case and breaking off
It sounds like the machine is out of time.. However, it is not an easy fix at home.
SOURCE: Singer Model 6233 While sewing the bobbin cas...
If you broke a needle and cannot get it to pick up the thread from the bobbin you need to check your timing. Remove the needle plate and turn the machine over watching the needle, when it is at the bottom of its travel the hook on the shuttle should be right next to or a fraction from the needle. So that as the needle begins to move upward the hook should pass it if it passes to soon it will miss the loop of thread. Check to make sure your needle is installed all the way up in the bar. If your machine is out of time and you are fairly handy, you can retime it. There should be 2 set screws some where behind the shuttle. Loosen them, one loose and one only as loose as need be to turn the shuttle. The needle must have moved upward about 1/16 before the hook is in place to catch the loop. This can be time comsuming, and you will have trial and error. Good luck. P.S. always check for simple stuff before you go for the hard stuff.
SOURCE: Needle breaking, hitting bobbin case
I had this problem and it is very easy to fix!
With mine I looked at it for about half an hour, and all I needed to do was put the bobbin case back in,(how it fits normally) and then hold it and turn it anti clockwise until it clicks, it may be quite pressured to do but ive heard a lot of people having this problem and thats all that needed doing!
Hope i helped! :)
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