RE: [CAD_CAM_EDM_DRO] Torque Units-WAS Re: What makes a motor a servo? calculating power

HI Andy,

Yeah, I think you've said that before! Then why not oz*in, or oz.in? They
aren't SUBTRACTED either!

It took me a few years to get when they swapped it from in/oz, and now you
want me to change again? ;>)

Alan KM6VV
P.S. Well if that was the only mistake I ever made, I'd be happy!

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Andy Wander
> Sent: Wednesday, May 11, 2005 12:12 PM
> To: 'CAD_CAM_EDM_DRO@yahoogroups.com'
> Subject: RE: [CAD_CAM_EDM_DRO] Torque Units-WAS Re: What makes a motor a
> servo? calculating power
>
> 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@...]
> 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.
>