VPI rimdrive squeaks


Has anyone else got or had a problem with a VPI rimdrive making a regular chirruping or squeak (in time with the rim drive rotation, not the platter).
Rimdrive is on my SuperScoutmasterReference, converted from belt drive.
I've tried ensuring the contact is as light as possible but no joy.
Silence if rimdrive isn't in contact with the platter, twice per revolution squeak from (I think) contact point when rimdrive engaged.
At 45rpm squeak is audible from 3 or 4 feet away. Less at 33rpm but still there.
HELP ! This is driving me mad.
rateourmover

Showing 3 responses by hiendmuse

I converted my SuperScoutmaster to Reference with rimdrive when the rimdrive first came out, and have not had any problems with squeaking or noise, it runs silently. My thought is that the contact pressure of rimdrive to platter is too high.

I adjust my rimdrive while the turntable is spinning, and very slowly and in very small increments move it until it has the proper pressure. It can take a while to do this properly. Make sure the body of the motor is parallel to the plinth. There should only be very slight contact of the rimdrive belt to the center metal rim of the platter. You can always call VPI and ask Mike for some pointers. He is very helpful.
Rateourmover, I have my super scoutmaster rimdrive reference table sitting on a symposium ultra shelf, and I use the symposium point pods below the motor assembly. Symposium made be 2 sets, each consisting of 2 pods, one on top of the other, which fit exactly between the rubber feet, and raise the rubber feet off the symposium ultra surface. I did this because the rubber feet were moving slightly with the rimdrive and creating a slight movement in the motor assembly and the table. The point pods eliminated the movement problem, and in fact improved the sound, with better PRaT.
No Stringreen, I'm not using pointed solid feet. I'm using flat plates made by Symposium Acoustics, which mate beautifully to the bottom of the motor assembly above and the Symposium Ultra shelf the plates sit on below. These plates made a real improvement, and eliminates movement that the motor assembly had using the rubber feet. I tried both the original rubber feet and their upgraded rubber feet. Both types of rubber feet were problematic in my motor setup with lateral movement, which was transmitted to the turntable.
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