Do you mean the spindle that holds the spool of thread, on the machine's top ?
If it's winding on that, chances are it's something about the spindle itself. Check that there isn't a loose washer under the spindle. If there is, check the washer for any rough spots, it may need replacing. Make sure the spindle is firmly screwed into the machine, if it screws in. If it's welded on, make sure there are no rough spots. If all that's ok. try putting a felt washer under the spool. You can b buy them but they're easy to make. Just cut a spool base size circle out of firm felt, and snip a hole in the middle just large enough to slip onto the spool. A leather punch works great for this. If it's still winding up, check the instructions, if you have them, and make sure you have the thread coming out from the spool in the right direction.Some machines are very picky about how they are threaded. For some, the thread must come from the back of the spool, for others, from the front of the spool. Try both to see if one orientation works better. And last check there is no rough spot, either on the needle or any of the thread guides. If the thread is being chafed anywhere along the thread path, excess tension may result, which can cause the thread to start winding on the spindle. Changing the needle is easy. Changing a guide may not be, but if it's a guide that's got a rough spot, see if you can remove the guide and then smooth the rough spot using some very fine sandpaper or emery cloth. The entire thread path has to be perfectly smooth for thread to move as it should.
Answers & Comments
Do you mean the spindle that holds the spool of thread, on the machine's top ?
If it's winding on that, chances are it's something about the spindle itself. Check that there isn't a loose washer under the spindle. If there is, check the washer for any rough spots, it may need replacing. Make sure the spindle is firmly screwed into the machine, if it screws in. If it's welded on, make sure there are no rough spots. If all that's ok. try putting a felt washer under the spool. You can b buy them but they're easy to make. Just cut a spool base size circle out of firm felt, and snip a hole in the middle just large enough to slip onto the spool. A leather punch works great for this. If it's still winding up, check the instructions, if you have them, and make sure you have the thread coming out from the spool in the right direction.Some machines are very picky about how they are threaded. For some, the thread must come from the back of the spool, for others, from the front of the spool. Try both to see if one orientation works better. And last check there is no rough spot, either on the needle or any of the thread guides. If the thread is being chafed anywhere along the thread path, excess tension may result, which can cause the thread to start winding on the spindle. Changing the needle is easy. Changing a guide may not be, but if it's a guide that's got a rough spot, see if you can remove the guide and then smooth the rough spot using some very fine sandpaper or emery cloth. The entire thread path has to be perfectly smooth for thread to move as it should.