SOURCE: on my old Singer 834, the bobbin thread puts out
Are you sure the bobbin thread is in the case correct. it also as tension support.Or is the bobbin thread right . When you make your bobbins that also should have tension.
SOURCE: machine does not sew- it does not catch the thread from bobbin
The timing mechanism is likely off. Take off the plastic bobbin case and see if the eye of the needle, on its way up, is just below the metal hook that catch the thread. If not,open the bottom cover with a flat screwdriver, loosen the two 2 mm hex screws, push out and disengage the gears. Adj the hook position by turning left or right so that it is right above the eye of the needle when the needle is on its way up. Tighten the hexes. I also give my machine a good old job with a high grade geese on the gears and light old drop on all moving parts before I close the cover.
Have fun.
SOURCE: Singer Sewing Machine model 9224. Bobbin thread
If you turn the handwheel, can you see a metal ring rotating around the outer edge of the bobbin case? If not rotating, broken gear or timing belt off.
If that ring is turning, remove the needle plate and bobbin case. As this ring now rotates, you will a finger on the ring that will pass behind the needle from right to left and it should catch the thread from the eye of the needle. If this finger, the "hook" passes above the eye, you have a timing problem.
Let me know.
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