I have a Huskystar C20 sewing machine and the bobbin case spins when i sew, causing the needle to hit it. How can I stop this?

try lubricating the drive- you may already have a drive problem-cheer Denny

Your timing is "retarded" (a real word meaning, just a little behind) Advance the hook a little when the needle is just at it\'s lowest point.

it's sounds like the machine could be out of time & the machine needs to be checked at a sewing machine shop, to find out for sure.

have you checked to may sure the bobbin is turned the right way & inserted
in the bobbin case the right way?
try changing the needle --flat side goes to the back of the machine

Be sure not to use Singer Needles. They are longer than standard needles. Don't know if this helps, but I did this once on my Huskystar 207 and that is what happened. It also damaged the bobbin thread.

Fairleigh

There is a screw on the bobbin holder. Clockwise=tighten, counter-clockwise=loosen. Hope this helps!

no u gotta go to shop onlt

What part of the bobbin case is breaking? I've never seen one break before.

Now if the bobbin case is rotating slightly in the machine and the needle is punching holes in it, there is a very simple way to fix this problem.

Set the bobbin case into the hook assembly as if reassembling the machine. There is a metal finger that it fits under on the left rear section of the case. If you place your index finger in the case where the bobbin fits and lift the back edge up against that metal finger, it should only come up about 0.8-1mm. If it raises up 2-3mm, this is the problem and the finger can be mechanically reformed to set closer to the bobbin case. Mechanical reforming is also known as bending. Push it down to the case and when you release pressure it should be close enough. This will keep the case from lifting so that it can't rotate during operation.

You may also be able to use a craft knife to remove all of the rough edges caused by the needle strikes on the bobbin case. I often do this for my customers so that we can be sure that a new case won't be damaged. When the customer brings it back for an annual service, I replace the bobbin case at that time.

I had this problem when I first bought my machine. I took it in and they told me it was a recall problem. All the machines were having the same problem. They fixed it and I have not had the problem since. I bought mine at a Joanne fabrics. Hope this helps.

I had this happen the first day I got my machine. The bobbin case has probably came loose from the holder. There is a step by step cleaning instruction in the manual and it tells you how to reset the bobbin case in the holder in the manual.