Re: [CAD_CAM_EDM_DRO] Re: stepper vs. servo - hundreds of microsteps
Posted by
Jon Elson
on 2004-02-16 09:39:54 UTC
turbulatordude wrote:
factors. They aren't looking for smooth stepping to discrete points,
but just smoothness, period. Vibration of a step motor would be
of minimal concern in a machine tool, but of vast concern on a
telescope. But, that is clearly a different application than this list
is intended for, and not what I was talking about at all.
Jon
>The telescope crowd talks about 200 to 500 microsteps in moving aAhh, this is an entirely different reason for high microstepping
>telescope and talks about 50 microsteps as commonplace.
>
>I hoped I was clear that 'motion control' is not CNC machine control
>for mills and lathes.
>
>Yes, their goal is keeping the steps down below 1/4 arc seconds for
>the scope, and gearing is needed.
>
>As you might imagine, a stepper motor banging between positions will
>induce a frequency at some point that will cause the machine to
>vibrate horribly. At least when the harmonics of the machine are in
>a similar frequency.
>
>The motion control goal is not step accuracy as we often consider,
>but a constant movement so as to prevent vibration from the detent
>from the steps and also to prevent a pause between steps that would
>make the image oscillate forward and back from the theoretical
>alignment.
>
>
>
factors. They aren't looking for smooth stepping to discrete points,
but just smoothness, period. Vibration of a step motor would be
of minimal concern in a machine tool, but of vast concern on a
telescope. But, that is clearly a different application than this list
is intended for, and not what I was talking about at all.
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....