Originally Posted by
bdschafer
I know how you feel, I have a 500 that was my first machine and it has really worked hard for me. The last 2 yrs it has given me problems. I've had it looked at my so many shops, but no one can figure out why the thread catches on something and knots up...I keep working with it, as I don't want to give it up..shes a good old friend....
I have a 1924 Singer 128 that I had serviced (it had been stored for many years unused) and was sewing nicely, but every 5 or 6 stitches, the thread would make a little loop underneath. I took it back to the guy who did the servicing and he couldn't figure it out at first. Then he decided the needle plate needed to be replaced. The surface of the plate had multiple scratches in it from broken needles, and the needle hole was no longer round. He said that because the needle hole was now too big, the loop formed by the thread as the needle comes back up was catching on burrs on the inside edges of the needle plate. He put on a new needle plate, and she works fine now.