Q: When I am sewing, my machine makes an occasional loop on the bottom of the fabric. I have checked my tensions, re-threaded the machine and it still happens. What is causing this?
A: This could be caused by a burr. Remove your needle plate and examine it closely, especially around the hole that the needle enters. Do you see marks where the needle has hit the needle plate? If so, this could be causing your problem. Take some very fine grit sandpaper or polishing cloth and smooth the needle plate. If the needle plate is too rough, you may need to replace it. Now, put your needle plate back on and try stitching again. If this did not remedy your problem, the burr might be on the hook, hook basket or somewhere more hidden, in which case you will need to bring it in for repair to your local sewing machine dealer.