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Motor Vibrations

I'm in the midst of tuning/upgrading a Well Tempered Classic. The original AC motor has a significant vibration, so I've been experimenting with the Origin Live DC motor and power supply. The OL motor vibrates fairly significantly, too, enough to be transmitted through the belt,platter and into the cartridge. I can also clearly feel the vibration in the belt whien I lightly touch it. I've experimented with different belts (the original rubber plus silk and nylon cords and dental floss) and found that the only way to reduce the vibration tranmitted to the cartridge is to loosen the belt tension to the point that there starts to be some "wow". Do all of you with DC motors experience vibration? If so, how much?

I suspect that I may have a bad motor, but the dealer tells me that the motors do vibrate to some degree. I could change over to Well Tempered's new AC motor which has some circuitry that is supposed to minimize vibration, cogging, etc. (See their website for details)

Any thoughts, suggestions, questions are welcomed.

Thanks
Jim
jimbo3
jimbo3 OP
304 posts
 
Tom or Doug- does your motor vibrate to the touch? Does the belt material (whatever you are using) vibrate when you lightly touch it while operating? Mine is relatively quiet, it's just that it vibrates to the touch.

If I can't find a suitable OL motor and the Teres motor doesn't fit, should I go with the latest Well Tempered AC motor or are there some other DC kits out there?

Thanks
Jim
twl
3,251 posts
 
If the OL motor is made by Maxon, it is a high quality motor, and should not cause this problem.

My Teres motor has no discernable vibrations on the housing that I can feel when it is running. However, I have battery power supply for it.

I have set up and auditioned an OL DC motor/controller system on another TT not too long ago, and did not notice this problem. But I didn't really look for it either. I'd get another kit from your dealer, just to make sure that it isn't some kind of defect in the kit, before you bail out on the OL package.
jimbo3 OP
304 posts
 
Thanks, Tom. He is going to be sending me another motor and if that doesn't do the trick, he's going to send an entire kit. I'll post the results.

Regards
Jim
jimbo3 OP
304 posts
 
I initially ran the motor for 5 days without a load and now, after running the motor under full load for a couple of days this week, it seems to have quieted down dramatically and the problem seems to have resolved itself.

Thanks to Jay at Audio Revelations for his assistance and persistence.

Jim
dougdeacon
3,338 posts
 
Jim, Not surprising if a motor needs a little run-in to settle down I guess. Just another audio voodoo mystery thingy.

Glad to hear the problem seems to be resolved. Especially since I kept forgetting to measure my motor pod like you requested :(
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