My Nolting whines at just the right pitch to hurt my ears. I tried slowing the speed but then my stitches are too long. I tried increasing the speed but then the machine gets away from me. I wondered if it was a belt noise, and thinking I might be able to adjust the belt, I took the machine apart at the back.
The first thing to do is remove the set screws on the handwheel. There are two and they are set at a right angle to each other. Trust me, there is a screw in there. It is not necessary to remove the screw completely, though I did. That handwheel was STUCK on the shaft and I wasn't sure if the screws had been released completely. Once I had them in my hand I knew that they weren't binding the handwheel. Something else was.
I managed to wiggle the handwheel a bit but it wouldn't come off easily. Every time I would turn it, the shft would turn, DUH. So I got the bright idea to stabilize the front handwheel with a clamp.
I managed to work the handwheel off of the shaft after much twisting and a generous application of Triflow.
You can see where the set screw was positioned by the mark it left on the shaft.
I then removed the hex screws from the back cover
and exposed the belt.
It wasn't too tight and there was no way that I could see to loosen it easily. I moved the belt off of that pulley and that loosened it but it made no difference with the noise so I put it back where I found it.
I don't know why it whines, but I will have to live with it. There is noting wrong with the machine and I certainly can much in some ear plugs. Maybe as time goes on I will get more skilled and can run the machine faster and the noise will change and be less bothersome.
I did happen to hear the same noise on one of Ann Olsen's videos. So I guess it's the nature of the beast.
