Originally Posted by virtualbernie
I have the Quantum L-500. I don't hear a noise. Are you using the original needle? Maybe the needle is dull--try changing it. Also, check out your bobbin case to see if it needs cleaning.
I've used Singers all my life and haven't had a problem. Singer's have gotten a rep over the years but I think it's because the folks that have had problems speak louder than the ones that have not.
Your Singer machines are probably older machines when they were built better. They aren't built as good as they used to be.
If now is your only opportunity to send it back, you may want to do that. Kenmore machines are either Janome or Elna, both excellent quality machines.
Good luck on your decision.