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Unread 11-08-2010, 15:31
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JamesCH95 JamesCH95 is offline
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Re: Remote operation of motors

Quote:
Originally Posted by Al Skierkiewicz View Post
"Bear in mind that if you used a CIM motor you would have vibrations in the 90hz range" James you will have to explain that one.
The free-speed of a CIM motor is about 5500RPM according to
http://www.firstwiki.net/index.php/CIM_motor
which is about what the motor would spin at if an eccentric mass (it's not really a cam) were mounted to it. Doing a little math shows...

5500 cycles/minute * 1 minute / 60 seconds = 91.7cycles/second [Hz]

Take off a little fudge factor for increased bearing load, and because round numbers are nice, you've got a vibration source of about 90Hz.

I will not, however, try to figure out the 3D non-linear vibration of the table
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