Re: [CAD_CAM_EDM_DRO] Re: Doubling up servo's...

I tried it and it doesn't work in either case.
I talked to Mariss about it quite some time ago and he predicted much like you did that it would vibrate badly. I wanted to see for my self and since I have plenty of motors around I used one encoder on two motors with one G320 and it indeed vibrate terribly
Dan Mauch
economical 3D scanner software and kits
low cost stepper and servo motors.
cases for Gecko drives
kits and assembled 3-4 axis drives
www.camtronics-cnc.com
www.seanet.com/~dmauch

----- Original Message -----
From: caudlet
To: CAD_CAM_EDM_DRO@yahoogroups.com
Sent: Saturday, December 08, 2007 9:15 AM
Subject: [CAD_CAM_EDM_DRO] Re: Doubling up servo's...


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "jerryflyguy" <hjjohnson@...>
wrote:
>
> Curious.. has anyone ever doubled up or stacked servo's. I was planning
> on using two on a common drive timing belt [one belt, two servo's and a
> pulley which they both drive]. Only one of the two would have a encoder
> and the power leads from both of them would be wired to the same
> drive.. [I'm not sure if they should be parralleled or series..]
>
> Curious...
>
> Jarrett Johnson
>
I predict some interesting reactions. Driving two motors off a single
drive has never been recommended. The PID tuning will be a real
challenge with two motors. The single encoder (which is the only
option you would have with a single drive) is not the issue. Only way
to tell is to hook it up and try it. You may just end up with dualing
motors where the strongest one tries to overpower the weaker one (:-)





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