Bobin on a pfaff hobby303 - PfaFF Sewing Machines

Refer to the manual to make sure you have the bobbin position in the right direction.

The bobin may not be in correctly. When looking at the bobin, with the thread threaded through the bobbin case, make sure that it spins counter clockwise. Also the problem could be caused by the machine not threaded correctly. But it is more likely the bobbin case and bobbin

thread jams or breakage generally points to incorrect thread tensions
read the hand book and adjust accordingly

yes something is wrong with the machine , it needs to be repaired

There is two possible solutions. either the machine has been knocked out of time by a thread jam or the needle rod has been bent. Good Luck!

I need a bobin case for 294 machine

Try changing your needle.

Try taking the covers off again. Now check under and around the bobin case, thats the black plastic bit that holds the bobin. Look for any fuzz or stray bits of thread inside the machine and and around the feed dogs and under the needle too. I use compressed canned air to get in and really blow everything clean. For some reason if the machine is not totally clean, inside the bobin gets tangled up. If you have had even one knot, odds are parts of it are still floating around inside there somewhere and stopping some little lever from moving and jamming your whole machine. Clean under the bobin case too since lint can left it up and keep the bobin from being perfectly level. Also inspect your bobbin case to make sure it isn't scratched along the edge that rotates back and forth. Even a a tiny scratch will cause it jump its tracks and your bobin will lift up and become jamed. In that case you just have to buy a new bobin case. But most of the time your culprit will be some stray bits of thread or lint.

i think your putting in your bobin backwards,
to check put your bobin in and hold bobin , and bobin case by thread if it unrolls its backwards,
hope this helps!!

Take a look at this Sewusa Link to take you to the threading diagram for this model.

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