Re: [ATM] DC Motor for grinding machine question

[Michael Lindner <mikell@optonline.net>]

Rod Brackenridge wrote:
> 24volt 100watt motor 6 amp, 2500 rpm.  
> 
> I would obviously need a gearbox / pulley system for reduction. 
> Could this motor be used to drive my turntable? Ideally I would
> like to vary speeds between about 3 to 50 rpm.

100 watts is a little on the anemic side, and I'd worry about power 
losses in reducing the speed by a factor of 800. As a point of 
reference, for my machine I was lucky to find two nominally 1/4 HP 72 
RPM DC motors rated 24V @ 14A! I reduced it 1:2.5 with a pulley and 
added a variac to adjust speed. The largest glass I've put on it was 18" 
which it handled fine.

-- 
Michael Lindner
http://www.starastronomy.org *** http://home.att.net/~mikel
http://www.atmsite.org *** http://www.atmlist.net
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