Re: [ATM] DC Motor for grinding machine question

[Michael Lindner <mikell@optonline.net>]

Richard wrote:
> Have you considered a three phase motor and an inverter which
> you can get fairly cheap from Ebay now?

I have a $15 variac. Hard to find a three phase inverter in that price 
range.

BTW, this motor appears similar to my motor (although a bit less powerful).

http://www.surpluscenter.com/item.asp?UID=2006110719574283&item=5-1486&catname=electric

and here's a decent transformer for it

http://www.surpluscenter.com/item.asp?UID=2006110719574283&item=15-1103&catname=electric

and a bridge rectifier 
http://www.surpluscenter.com/item.asp?UID=2006110719574283&item=22-1206&catname=electric

add a variac like http://www.action-electronics.com/variac.htm - you can 
get them cheaper if you shop around. I only have 1 variac - I run one 
motor at speed and slow the other (fast TT slow OA for grinding, slow TT 
fast OA for polishing/figuring).

Don't forget a power cord, switch and fuse.

Note that I'm not endorsing these products nor vendors, and you may find 
something better and/or cheaper if you look around. I just googled and 
took the first things that looked halfways decent.

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