Torque Units-WAS Re: What makes a motor a s ervo? calculating power

LOL Andy, alrgiht already - we can't type! :-)



--- In CAD_CAM_EDM_DRO@yahoogroups.com, Andy Wander <awander@v...>
wrote:

> At the risk of being labeled as "picayune", I will repeat:
>
> It is NOT oz/in, it is OZ-IN or IN-OZ>
>
> They are MULTIPLIED, not DIVIDED!
>
> Had to get that off of my chest........
>
> Andy Wander
> Verrex Corporation
>
> -----Original Message-----
> From: Alan Marconett [mailto:KM6VV@a...]
> Sent: Wednesday, May 11, 2005 2:48 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: RE: [CAD_CAM_EDM_DRO] Re: What makes a motor a servo?
> calculating power
>
> Thanks Mariss,
>
> I didn't find it, but the stepper is probably 550 oz/in?
>
> Interesting, but not surprising that a servo is about 2X more

powerful for

> its size/weight. I'd noticed that steppers seem to be bigger for

the same

> power (building robots). More wattage in a smaller/lighter package
> because...?
>
> If I take half of 170 oz/in for the servo, then about 85 oz/in

servo

> (possibly less) would be similar to a 550 oz/in stepper in

machines they

> could drive (gearing needed for servo).
>
> Can I assume that the "300 Watts" printed on my servos is

continuous? I

> don't have them in front of me, and I didn't find them on a Google

search.

> Target machine is an RF-31 mill. The 1000 (or was it 2000) line

encoders on

> them are over kill, I'll have to reduce that. Or does one of your

new servo

> drivers do that for me?
>
> Thanks for the comparison.