Re: [CAD_CAM_EDM_DRO] 90v DC motor as servo?

Chris,

I have not used the Gecko drives so will reserve comment.
Many on the group use them however.

Yes gear reduction changes the effective inertia forces.
System performance can be easily calculated with free
motion control software like that at

http:///www.kolmorgen.com

You need to know the motor inertia, torques, power, etc.
If you cannot find a spec a fair inertia approximation can be arrived at by
measuring rotor dimensions and assuming it is a solid cylinder of steel.
Some of it is air and some is copper but
it is very roughly a wash. The software will calculate the inertia.

You also need to know the masses , friction, and reduction ratios of the
mechanism. And what performance you desire!

If need be I can do a run for you.

And yes as Jon mentioned you need an encoder to go with
the motor. I use U.S. Digital mostly. They are in the $50 range... some
more, some less.

Leslie Watts
L M Watts Furniture
Tiger, Georgia USA
http://www.rabun.net/~leswatts/wattsfurniturewp.html

----- Original Message -----
From: "Chris Stratton" <stratton@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, May 19, 2001 11:41 AM
Subject: Re: [CAD_CAM_EDM_DRO] 90v DC motor as servo?


> Les,
>
> Thanks for the info. Obviously, one is not going to build a high
> speed servo system with 90v DC motors