In article ,
"Michael Koblic" wrote:

"Don Foreman" wrote in message
...

[...]

I am trying to visualize how to get a big plastic bowl to shake at 1700
Hz with a motor cannibalized from a drill press :-)

That'll require some gears. 1700 Hz is 102,000 RPM.

Please explain.

The standard frequency of these vibrating tumblers is either 1700 or 3000
vibrations per second (Hz). Are you saying their motors run that fast? I
thought the unit shakes once for each revolution of the eccentrically loaded
shaft.

....you are not paying attention to details. A normal 60 hz induction
motor is going to be running either 3600 or 1800 (not quite due to
slippage) RPM. That would be 60 or 30 hz. If you want 1700hz, you need
102,000 rpm - a factor of 60. That would be the difference between
measuring per second (Hz) and per minute (RPM.) We collectively suspect
that you mean vibrations per minute, not Hz.

--
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