Yes, but it's been a long time. Look in the troubleshooting part of your manual to see if you can find any info to help you. Is it just getting tangled down in the feed dogs or are the bobbin threads coming through to the top? Check your tension setting make sure it is set appropriately. Set it to the default (maybe 4) I think it is marked with a dot on the wheel. Alao take the bobbin out and rethread it. Do the same with the upper thread. Is this happening on everything or just this one particular thing? What are you embroidering on?