Motor Vibrations

I don't know what kind of DC motor you've got there Jimbo, but the Maxon DC motor in my Teres is totally vibrationless to the touch. I can't feel any vibration coming out of it. I think either that DC motor has a problem, or there is something else going on with it.

That's not a typical characteristic, for a good DC turntable grade motor to be vibrating like that. Something is wrong.

Agree with Twl, my Maxon has no detectable vibration except by touching the motor itself, and then just barely. My cat's purrs are deafening by comparison. Get a refund or exchange on that thing.

I don't know if a WTC would accommodate a Teres motor but maybe worth investigating. Lots of other TT owners are using them.

Thanks, Doug and Tom. I kinda figured something was wrong with the OL motor.

I looked into the Teres motor and I don't think it won't fit into the WT. I don't recall the exact measurements of the Teres motor- could eother of you measure height and width of yours for me? I'll double-check my table to see if I can make something work.

BTW- The OL motor is a Maxon, although not the same model as the one that Teres uses.

Jim

Maybe it is a bad motor, or maybe it has something to do with the power that you are feeding it. It needs to be dead flat DC.

Tom- I do have the OL power supply and regulator, but perhaps one of these are defective??

I don't know exactly where the problem lies Jim. But something is amiss.

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

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.

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

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

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 :(

1. It is caused by unbalance of the rotor, coupler, coupling and driving wheel (brake wheel).

2. If the iron core support is loose, the inclined key and pin are invalid and loose, and the rotor is not tightly bound, the rotating part will be unbalanced.

3. The shafting of the linkage part is not aligned, the centre lines are not coincident, and the centring is not correct—this kind of fault caused by poor alignment and improper installation during installation.

4. The centre lines of the linkage part coincide in the cold state. Still, after a period of operation, due to the deformation of the rotor fulcrum and foundation, the centre line is damaged, resulting in vibration.

5. The faults of the gear and coupling connected with the motor, the bad engagement of the gear, the serious wear of the gear teeth, the bad lubrication of the counter wheel, the skew and dislocation of the coupling, the wrong tooth shape and pitch of the gear coupling, the excessive clearance or serious wear will cause certain vibration.

6. The structure defects of the motor include elliptical journal, bending shaft, too large or too small clearance between the shaft and bearing bush, and insufficient rigidity of bearing pedestal, foundation plate, some part of the foundation and even the whole motor installation foundation.

7. Installation problems, the motor and the foundation plate, is not fixed firmly, the foot bolt is loose, the bearing pedestal and the foundation plate are loose, etc.

8. Too large or too small clearance between the shaft and bearing bush can cause vibration and cause abnormal lubrication and temperature of the bearing bush.