CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] stepper vs. servo

on 2004-02-11 19:23:21 UTC
Has anybody ever designed a micro-stepping driver that outputs
approximations of sine/cos to two adjacent coils. I understand that you
develop max torque at any rpm, up to the max (which is higher than the
square-wave input). Is this true? How much would it take to develop,
assuming no one already has? BTW does anybody know anything about Don
Lancaster's (tenaja.com) Magic Sine Waves, and if they can be applied to
this application.

RayHex

----------
> From: Jon Elson <elson@...>
>
> Given the Gecko 320 as the driver for the servos, I think there are a
> couple of significant advantages over steppers. First, the servos are
> usually capable of a greater speed range, while steppers rapidly lose
> torque at higher speeds. With servos, you rarely have to worry about
> resonance issues. You don't say whether you will use belts, rack and
pinion
> or leadscrews to drive this machine, but the servo will likely provide
> smoother motion, and be less perturbed by some backlash in the mechanics.
> Steppers can go wild when rack and pinion drive is used, and rattle the
> gears
> something awful. Finally, if you lose a step with a stepper drive, you
> won't know it until you measure the finished part. With the gecko 320,
> it won't allow small errors to build up, and will fault if the drive
binds
> up or crashes. This can be sensed by the computer and cause it to stop
> all axes.
>
> Jon

Discussion Thread

plastiguy 2004-02-09 18:41:27 UTC stepper vs. servo bull2003winkle 2004-02-09 19:49:34 UTC Re: stepper vs. servo Jon Elson 2004-02-09 21:24:17 UTC Re: [CAD_CAM_EDM_DRO] stepper vs. servo ballendo 2004-02-09 21:59:06 UTC Re: stepper vs. servo Albee Tang 2004-02-09 21:59:07 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Roy J. Tellason 2004-02-09 22:35:39 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Les Newell 2004-02-10 00:55:07 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo John Johnson 2004-02-10 05:22:09 UTC Re: [CAD_CAM_EDM_DRO] stepper vs. servo Peter Renolds 2004-02-10 06:01:12 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo - H Bridge question Jon Elson 2004-02-10 07:47:46 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Stan Aarhus 2004-02-10 07:49:36 UTC Re: [CAD_CAM_EDM_DRO] stepper vs. servo ballendo 2004-02-10 07:50:14 UTC DIY servo drive? was Re: stepper vs. servo Jon Elson 2004-02-10 08:02:47 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo bank haam 2004-02-10 09:47:15 UTC Re: [CAD_CAM_EDM_DRO] DIY servo drive? was Re: stepper vs. servo Mariss Freimanis 2004-02-10 11:36:49 UTC DIY servo drive? was Re: stepper vs. servo dchristal2 2004-02-10 13:32:47 UTC Re: stepper vs. servo ballendo 2004-02-10 16:59:46 UTC Re: stepper vs. servo ballendo 2004-02-10 17:02:13 UTC Re: stepper vs. servo ballendo 2004-02-10 17:03:03 UTC Re: stepper vs. servo Roy J. Tellason 2004-02-10 17:51:24 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Jon Elson 2004-02-10 21:23:22 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Roy J. Tellason 2004-02-10 21:42:58 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Tony Jeffree 2004-02-11 02:17:12 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Les Newell 2004-02-11 02:31:50 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Les Newell 2004-02-11 02:43:21 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Raymond Heckert 2004-02-11 19:23:21 UTC Re: [CAD_CAM_EDM_DRO] stepper vs. servo Robert Campbell 2004-02-11 19:40:12 UTC Re: [CAD_CAM_EDM_DRO] stepper vs. servo bull2003winkle 2004-02-11 20:35:58 UTC Re: stepper vs. servo Jon Elson 2004-02-11 20:51:18 UTC Re: [CAD_CAM_EDM_DRO] stepper vs. servo Jon Elson 2004-02-11 21:02:29 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo ballendo 2004-02-12 09:03:44 UTC Re: stepper vs. servo ballendo 2004-02-12 09:04:03 UTC microstepping was Re: stepper vs. servo Harvey White 2004-02-12 11:44:40 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Chris Cain 2004-02-12 16:44:15 UTC RE: [CAD_CAM_EDM_DRO] microstepping was Re: stepper vs. servo JanRwl@A... 2004-02-12 20:42:04 UTC Re: [CAD_CAM_EDM_DRO] microstepping was Re: stepper vs. servo ballendo 2004-02-13 06:36:22 UTC Re: stepper vs. servo turbulatordude 2004-02-13 07:26:28 UTC Re: stepper vs. servo ballendo 2004-02-13 07:51:51 UTC microstepping was Re: stepper vs. servo Harvey White 2004-02-13 08:34:30 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Mariss Freimanis 2004-02-13 10:11:40 UTC Re: stepper vs. servo Jon Elson 2004-02-13 10:15:17 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Mariss Freimanis 2004-02-13 10:59:38 UTC Re: stepper vs. servo Jon Elson 2004-02-13 18:46:24 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo ballendo 2004-02-14 07:46:52 UTC Re: stepper vs. servo ballendo 2004-02-14 07:46:53 UTC Re: stepper vs. servo Harvey White 2004-02-14 08:43:17 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo Mariss Freimanis 2004-02-14 12:31:32 UTC Re: stepper vs. servo ballendo 2004-02-15 11:45:06 UTC Chopper methodology was Re: stepper vs. servo ballendo 2004-02-15 11:45:07 UTC Stepper Mid band resonance Help! please... jeffalanp 2004-02-15 12:22:14 UTC Re: Stepper Mid band resonance Help! please... Mariss Freimanis 2004-02-15 13:02:29 UTC Chopper methodology was Re: stepper vs. servo Mariss Freimanis 2004-02-15 13:22:53 UTC Re: Stepper Mid band resonance Help! please... zephyrus@r... 2004-02-15 16:33:25 UTC Re: Chopper methodology was Re: stepper vs. servo Mariss Freimanis 2004-02-15 17:05:54 UTC Chopper methodology was Re: stepper vs. servo turbulatordude 2004-02-15 22:20:30 UTC Re: stepper vs. servo - hundreds of microsteps turbulatordude 2004-02-15 22:40:08 UTC Re: stepper vs. servo - Allegro and ignoring the edges.... Jon Elson 2004-02-16 09:39:54 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo - hundreds of microsteps Mariss Freimanis 2004-02-16 10:48:05 UTC Re: stepper vs. servo - Allegro and ignoring the edges.... ballendo 2004-02-16 10:52:22 UTC Chopper methodology was Re: stepper vs. servo jmkasunich 2004-02-16 14:07:51 UTC Re: Stepper Mid band resonance Help! please... Mariss Freimanis 2004-02-16 14:22:28 UTC Re: Stepper Mid band resonance Help! please... jmkasunich 2004-02-16 14:38:26 UTC Re: stepper vs. servo - Allegro and ignoring the edges.... jmkasunich 2004-02-16 14:41:11 UTC Re: Stepper Mid band resonance Help! please... ballendo 2004-02-16 15:25:25 UTC Re: Stepper Mid band resonance Help! please... Jon Elson 2004-02-16 22:01:46 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo - Allegro and ignoring the edges.... Mariss Freimanis 2004-02-17 07:14:02 UTC Re: stepper vs. servo - Allegro and ignoring the edges.... turbulatordude 2004-02-17 08:09:24 UTC Re: stepper vs. servo - Allegro and ignoring the edges.... Mariss Freimanis 2004-02-17 09:27:33 UTC Re: stepper vs. servo - Allegro and ignoring the edges.... Jon Elson 2004-02-17 19:28:16 UTC Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo - Allegro and ignoring the edges....