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VPI Rim Drive vibrations

I have VPI SSM with RIM drive and SDS. The issue I'm having is a vibration being transferred from rim to the desk/platter. As the result tonarm wobbles a little bit in azimuth plane.
I tried to replace the brownish rim belt, change contact force/distance between the drive and the platter, and reinstall the belt - the vibration still there (exactly one wobble per rim's full revolution - 360 degrees).

The speed stability is very good though - have checked it with KAB Speed Strobe.

Any ideas how to resolve the issue?

Thanks a lot!
krell303

Showing 1 response by normansizemore

normansizemore
601 posts
 
With a rim drive table, the drive puck or idler wheel has to be perfect. Their should be NO variations whatsoever so that the motor, platter or idler wheel have to absorb them! That's crazy. My Dual 1229 (yes I know it's a different design, but the principal is the same) is perfect, as are thousands of Thorens, EMT, Garrard, Miracords,Rek-O-Cuts etc. Nothing can be 'out-of-round', that is simply unacceptable especially for a table of this caliber. It isn't rocket science to manufacture something from rubber or metal and to make sure that it is 'true' and 'balanced'. Anything less will certainly be transmitted into the music. I would raise all kinds of trouble until the manufacturer corrected the problem. I hope things work out for you. Idler/Rim drive has been the most rewarding listening experience I know of for vinyl playback. Good luck..
Norman
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