Re: [ATM] how much hp for a waineo...

[Bill Prewitt <bprewitt@neo.rr.com>]

hermit wrote:
> Mel Bartels wrote:
> 
>>> i want to build a waineo type grinding machine. i want it large 
>>> enough to
>>> grind a 24 inches mirror.I wonder, how much hp is needed to drive 
>>> this thing
>>> ?  maybe i can use 2 motors one for the turntable and the other for the
>>> overarm... for now i have just an 1/3 hp motor. what are you suggesting?
>>
>>
>>
>> A single 1/4 hp motor will do for mirrors up to 12-16 inches.  For 
>> larger mirrors I suggest a 3/4 hp motor.
>>
> I did a 12.5 with two motors much less powerfull than that.  I think it 
> was the motor for the table top grinder some years back in S&T.  
> Remember, these are geared way down.  Mine is about a 17 rpm.  Polishing 
> was pretty much at the limit and icecubes to cool it down helped. ;-)    
> I think the motor  I gave Bill Prewit to do his 30 inch was 1/2 hp.  I 
> believe he drove the overarm with that and used a copy machine motor to 
> turn the platter.  You there Bill?  I know here I can pick up surplus 
> 1/4 to 1/2 pretty easy.  Over that they get harder to find.
> 
> Ken


Yup
It's a 1/2 Hp motor for the overarm and a 1/3Hp Xerox gearmotor for the 
platter drive. But the two stage belt reduction cuts the speed down to 7 
and 4 RPM. It'd take more power to go faster with a 36 inch platter.
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