I did get my machine fixed. I called the repairman that was a friend and he told me what to look for. I did.
He said to remove the bobbin and the cariage. Take a light and look all in the inside around every moving part for any thread tangled. You will really have to look good becauce the thread changes colors with oils in the machine. It is difficult to get it out. I had to use a very long apolstry needle I had to reach the thread wrapped around the gears. THen use the tweezers and keep on until I got it all out. You have to be very careful as the gears are plastic. Mine is going now.
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called bird nesting and is a result of too loose a needle thread tension
if you use an automatic tensioner or using the numbers
and you still have a problem, the correct tension is a resistance to you pulling the thread prior to threading the needle
First thing to always try: Install a brand new needle. A dull, worn, or bent needle will cause great frustration. It is also the least expensive resolution to most problems.
Second: Remove all the threads. RAISE the presser foot. Rethread from the beginning making sure it is threaded correctly.
Pull up the bobbin thread before beginning to stitch and hold the thread tails in the left hand while slowly taking the first few stitches:
Install a brand new needle--make sure the flat side is facing the correct direction. Remove all the thread. RAISE the presser foot and rethread everything from the beginning. Make sure the bobbin is threaded properly.
Hand rotate the handwheel one full turn and see if it picks up the bobbin thread. If not, make sure you are using the correct needles.
Open the bobbin door and while watching the needle action, watch when the needle comes down, is it looping to catch the bobbin thread? If it's not, then it could be a needle/hook timing problem.
Do you have the right needle in your machine? There are some Sergers that take shorter needles and I have has some customers put those short needles on thier sewing machine. If the needle is too short it cannot pick up the bottom thread.
If that isn't the problem I would also try to rethread the machine and the bobbin. It sounds very simple, but sometimes you can miss a step
If none of the above don't work, you may have a timing issue. Have you run over a pin? or had the needle come down on a presser foot? Sometimes these sudden stops can knock the machine out of time.
Check the ovious things first make sure you needle isnt broken... then make sure there isnt any thread twisted inside your bobin housing. make sure bobin is inserted correctly if those things dont help it could be an issue of timing in your machine... I work as an embroidery operator in a factory setting and those things usually help..