CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] Re: Synchronizing Two Servo Motors

Posted by Jon Elson
on 2009-03-11 19:32:27 UTC
Yahoo wrote:
> Jon,
> Thanks, to you and a couple of other guys, for the ideas on big machines,
> but this is a small one, only 24" travel X & Y. I've thought of many
> different mechanical solutions, but every one ends up being too complicated.
> The only practical one would be to slave the two screws by a chain or belt,
>
If you belt the two screws together, you don't need two motors!
> but it seems like this could cause the motors to fight, leading to potential
> oscillation problems or excess current when idle. Setting the controller to
> stop everything when any channel faults, and slaving two channels for the
> dual lead probably would work, except in case one of the motor couplers
> failed. This failure also would not be covered by any electrical solution
> that relies on the motor encoder signals, as they are mounted on the motor,
> not the lead screw. The only really fail safe solution would be a
> differential switch controlled by a timing belt at the far end of the
> screws. If only I could find a belt long enough. It would need to be roughly
> 6' and anything too thick would eat up a lot of torque just in friction.
>
Hmm, yes, 6' of belt or chain would flap a lot. If you constrained it
with guides, that would add friction.

Jon

Discussion Thread

Mattison 2009-03-10 12:02:18 UTC Synchronizing Two Servo Motors Alan Marconett 2009-03-10 12:14:47 UTC RE: [CAD_CAM_EDM_DRO] Synchronizing Two Servo Motors Roland Jollivet 2009-03-10 13:10:41 UTC Re: [CAD_CAM_EDM_DRO] Synchronizing Two Servo Motors Yahoo 2009-03-10 13:29:04 UTC Re: Synchronizing Two Servo Motors H & J Johnson 2009-03-10 13:39:52 UTC Re: [CAD_CAM_EDM_DRO] Synchronizing Two Servo Motors Stephen Wille Padnos 2009-03-10 14:08:18 UTC Re: [CAD_CAM_EDM_DRO] Synchronizing Two Servo Motors H & J Johnson 2009-03-10 14:27:34 UTC Re: [CAD_CAM_EDM_DRO] Synchronizing Two Servo Motors Stephen Wille Padnos 2009-03-10 14:59:00 UTC Re: [CAD_CAM_EDM_DRO] Synchronizing Two Servo Motors Yahoo 2009-03-10 17:14:37 UTC Re: Synchronizing Two Servo Motors Jon Elson 2009-03-10 19:50:50 UTC Re: [CAD_CAM_EDM_DRO] Re: Synchronizing Two Servo Motors jcc3inc 2009-03-11 05:48:59 UTC Re: Synchronizing Two Servo Motors Yahoo 2009-03-11 10:06:29 UTC Re: Synchronizing Two Servo Motors Franklin York 2009-03-11 12:00:51 UTC RE: [CAD_CAM_EDM_DRO] Re: Synchronizing Two Servo Motors Roland Jollivet 2009-03-11 12:02:20 UTC Re: [CAD_CAM_EDM_DRO] Re: Synchronizing Two Servo Motors Yahoo 2009-03-11 14:03:18 UTC Re: Synchronizing Two Servo Motors Torsten 2009-03-11 16:58:45 UTC Re: Synchronizing Two Servo Motors Jon Elson 2009-03-11 19:32:27 UTC Re: [CAD_CAM_EDM_DRO] Re: Synchronizing Two Servo Motors Roland Jollivet 2009-03-11 22:05:03 UTC Re: [CAD_CAM_EDM_DRO] Re: Synchronizing Two Servo Motors Roland Jollivet 2009-03-13 15:09:53 UTC Re: [CAD_CAM_EDM_DRO] Re: Synchronizing Two Servo Motors Yahoo 2009-03-13 15:38:20 UTC Re: Synchronizing Two Servo Motors Brian Pitt 2009-03-14 10:30:11 UTC Re: [CAD_CAM_EDM_DRO] Re: Synchronizing Two Servo Motors