RE: [CAD_CAM_EDM_DRO] Torque Units-WAS Re: What makes a motor a s ervo? 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.