My 500 is giving me problems
I got this Singer 500 with my first teaching job!! It has been a wonderful machine all these years...But now it is acting up...I'll be sewing along just fine, then it will stop and knot up underneath. Right off I'd say it's catching on something, but I have had it into 2 different shops and nothing wrong...I was wondering if any of you great folks have run into something like this??? Thanks for any suggestions..