Variable Transformers on grinders...?

Has anyone used/worked with a variable transformer hooked up to a 1HP single phase AC electric motor?

I've got a 2x72 Bee Grinder and need to slow it down for better control and such, but the upgrade kit is $1249.00(!!!) and a new variable speed machine is only (ya, right)$2049.00! I can't afford either of these options right now and was wondering if the variable transformer might be a way around this. I can get a 0-120V, 60Hz, 12amp (15A max)unit for $200 approx. Is this a worthwhile thing to do? I assume that a lose of power is going to be noticable, but is it something that will work reasonable well? Do you think that I could slow the beast down by 50% or so without losing too much oomph?

Any input would be appreciated.

Thanks

Darren
 
T

Tom Anderson

Joined
Dec 20, 2000
Messages
871
Scooter:

The best way to slow down your Bee is to install a DC motor with a variable speed control.

From what I've heard (talking to a couple of power transmission gurus), hooking up a reostat (like those used on ceiling fans) to your AC motor really affects the output hp.

I don't know if the Bee uses the same "C" face Baldor motor like my Wilton, but - if it does you can buy a DC/variable speed kit from Kovals or similar supplier for about $600.00 or so. The Kovals kit includes everything you'll need - wiring and all - and it works very well. (I installed one of these on my Wilton Square Wheel grinder a while back and love it!)
wink.gif


ps: I can slow it down to the point that the belt barely moves!
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Tom Anderson
Hand Crafted Knives

[This message has been edited by Tom Anderson (edited 02-08-2001).]
 
Darren,I dont think a v/trans., is the way to go,your grinder would probably not run at all.That type of control is used mainly,to stabilize incoming voltage,ie:to keep it a constant 120, 220, or whatever.A reostat like on a dremel or foredom tool also w/not work,as they are only suited for fractional horsepower motors.You can get a 1-1 1/2hp dc variable speed motor w/controls for 400-550usd,from a number of places,K&G comes to mind.

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MJH
 
Thanks guys, I'll just save my pennies and spring for the proper variable setup later.

Darren
 
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