Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
Posted by
Roy J. Tellason
on 2004-08-05 19:49:34 UTC
On Thursday 05 August 2004 11:57 am, Jon Elson wrote:
the back EMF of a motor will be? I feel like I'm missing something here...
> > If they are, where is there a better deal? And whyThis part of your post I don't quite follow. How are you figuring out what
> >isn't it more widely publicized? Also, why do you recommend a 80-120V
> >power supply for the Ameteks when camtronics only sells a 36V for them?
> For performance. To get full peak torque, you need to deliver 12 A
> to the motor. With a 36 V power supply, you can't deliver 12 A to a 4 Ohm
> motor, even standing still. At 900 RPM, the back EMF of the motor is
> approximately 36 V, so you can produce zero torque! This severely
> limits performance. I have a client in town who has an 800 Lb Grizzly
> style machine with these motors and a 36 V supply, and the performance is
> pretty weak. To get full peak torque at rated speed, you need 36 + 12 * 4=
> 84 V minimum, appled to the MOTOR itself. You need some margin for the
> modulation scheme of the servo amp. too. So, a 120 V supply sounds good,
> but if using Gecko 320 drives, 75 V or so is the limit. With a 5 TPI screw
> driven directly, you get 180 IPM, which should be plenty for most users.
> But, if belt reduction is used, or if the screw is finer than 5 TPI,
> then the max rapid rate goes down, even with the higher voltage.
the back EMF of a motor will be? I feel like I'm missing something here...
Discussion Thread
aschoepp
2004-08-02 09:12:17 UTC
mill servo conversion ?'s
Dave Fisher
2004-08-02 09:48:07 UTC
RE: [CAD_CAM_EDM_DRO] mill servo conversion ?'s
Jon Elson
2004-08-02 10:09:51 UTC
Re: [CAD_CAM_EDM_DRO] mill servo conversion ?'s
Doug Chartier
2004-08-02 13:25:39 UTC
Bridgeport BOSS control parts on eBay
Jon Elson
2004-08-02 17:37:29 UTC
Re: [CAD_CAM_EDM_DRO] mill servo conversion ?'s
Thea xxxxx
2004-08-03 14:13:43 UTC
RE: [CAD_CAM_EDM_DRO] mill servo conversion ?'s
carlos_is_dead
2004-08-03 14:15:18 UTC
Re: mill servo conversion ?'s
Jon Elson
2004-08-03 20:13:12 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
carlos_is_dead
2004-08-04 20:17:31 UTC
Re: mill servo conversion ?'s
Jon Elson
2004-08-05 09:01:56 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
Dan Mauch
2004-08-05 13:54:30 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
carlos_is_dead
2004-08-05 15:13:55 UTC
Re: mill servo conversion ?'s
Roy J. Tellason
2004-08-05 19:49:34 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
marvinstovall
2004-08-05 19:49:49 UTC
Re: mill servo conversion ?'s
Stephen Wille Padnos
2004-08-05 20:23:00 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
Roy J. Tellason
2004-08-05 20:52:35 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
Stephen Wille Padnos
2004-08-05 21:09:25 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
Jon Elson
2004-08-06 11:17:06 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
Jon Elson
2004-08-06 11:23:03 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
carlos_is_dead
2004-08-09 19:00:14 UTC
Re: mill servo conversion ?'s
Jon Elson
2004-08-09 22:20:27 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
Jon Elson
2004-08-09 22:25:49 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s
carlos_is_dead
2004-08-10 16:18:39 UTC
Re: mill servo conversion ?'s
Jon Elson
2004-08-10 18:07:59 UTC
Re: [CAD_CAM_EDM_DRO] Re: mill servo conversion ?'s