CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] microstep accuracy was what comprises as step

Posted by Jon Elson
on 2002-03-29 23:20:00 UTC
"Scott M. Thomas" wrote:

> Accuracy may be the wrong term here, but you would get finer steps of
> positioning, correct? So if you were using feedback, let's say from a DRO
> unit, couldn't we then achieve higher accuracy?

Not necessarily. A stepper guarantees it will move when issued a half
step, under almost all circumstances. Much finer than a half step, and
there's no guarantee of any movement at all, and it most likely will not
move a proportionate amount. If you have X10 microstepping, and you
slowly click in steps, the motor may only move every 3 or 4 steps,
erratically. If you use encoder feedback, without deadband, you
guarantee hunting will occur. it might be rather innocuous, or it could
cause a really annoying vibration.

Jon

Discussion Thread

lenskeeper2000 2002-03-22 20:05:10 UTC Why is my feedrate slow with stepper motor JanRwl@A... 2002-03-22 21:35:34 UTC Re: [CAD_CAM_EDM_DRO] Why is my feedrate slow with stepper motor mariss92705 2002-03-22 21:37:23 UTC Re: Why is my feedrate slow with stepper motor Jon Elson 2002-03-22 23:16:08 UTC Re: [CAD_CAM_EDM_DRO] Why is my feedrate slow with stepper motor Carol & Jerry Jankura 2002-03-23 05:39:18 UTC RE: [CAD_CAM_EDM_DRO] Why is my feedrate slow with stepper motor lenskeeper2000 2002-03-23 06:03:30 UTC Re: Why is my feedrate slow with stepper motor Carol & Jerry Jankura 2002-03-23 08:57:12 UTC RE: [CAD_CAM_EDM_DRO] Re: Why is my feedrate slow with stepper motor Tim Goldstein 2002-03-23 09:42:03 UTC RE: [CAD_CAM_EDM_DRO] Re: Why is my feedrate slow with stepper motor dave_ace_me 2002-03-23 13:32:03 UTC what comprises as step (was Re: Why is my feedrate slow with stepper motor Jon Elson 2002-03-23 16:41:11 UTC Re: [CAD_CAM_EDM_DRO] Re: Why is my feedrate slow with stepper motor Carol & Jerry Jankura 2002-03-23 17:07:43 UTC RE: [CAD_CAM_EDM_DRO] what comprises as step (was Re: Why is my feedrate slow with stepper motor Roger Nicholas 2002-03-23 18:47:46 UTC RE: [CAD_CAM_EDM_DRO] Re: Why is my feedrate slow with stepper motor Tim Goldstein 2002-03-23 19:23:20 UTC RE: [CAD_CAM_EDM_DRO] Re: Why is my feedrate slow with stepper motor Carol & Jerry Jankura 2002-03-23 20:36:31 UTC RE: [CAD_CAM_EDM_DRO] Re: Why is my feedrate slow with stepper motor Steve Blackmore 2002-03-24 01:29:05 UTC Re: [CAD_CAM_EDM_DRO] Re: Why is my feedrate slow with stepper motor lenskeeper2000 2002-03-24 09:08:23 UTC Re: Why is my feedrate slow with stepper motor ballendo 2002-03-29 13:45:21 UTC microstep accuracy was what comprises as step Scott M. Thomas 2002-03-29 14:28:55 UTC RE: [CAD_CAM_EDM_DRO] microstep accuracy was what comprises as step mariss92705 2002-03-29 15:54:00 UTC Re: microstep accuracy was what comprises as step ballendo 2002-03-29 16:33:58 UTC Re: microstep accuracy was what comprises as step Jon Elson 2002-03-29 23:20:00 UTC Re: [CAD_CAM_EDM_DRO] microstep accuracy was what comprises as step Carol & Jerry Jankura 2002-03-30 05:35:35 UTC RE: [CAD_CAM_EDM_DRO] microstep accuracy was what comprises as step mariss92705 2002-03-30 14:13:00 UTC Re: microstep accuracy was what comprises as step Jon Elson 2002-03-30 23:20:38 UTC Re: [CAD_CAM_EDM_DRO] microstep accuracy was what comprises as step Jon Elson 2002-03-30 23:44:37 UTC Re: [CAD_CAM_EDM_DRO] Re: microstep accuracy was what comprises as step dave_ace_me 2002-03-31 06:56:41 UTC Re: microstep accuracy was what comprises as step Alan Marconett KM6VV 2002-03-31 14:31:07 UTC Re: [CAD_CAM_EDM_DRO] microstep accuracy was what comprises as step Alan Marconett KM6VV 2002-03-31 15:28:59 UTC Re: microstep accuracy was what comprises as step Jon Elson 2002-03-31 23:11:31 UTC Re: [CAD_CAM_EDM_DRO] microstep accuracy was what comprises as step Jon Elson 2002-03-31 23:16:19 UTC Re: [CAD_CAM_EDM_DRO] Re: microstep accuracy was what comprises as step ballendo 2002-04-06 08:05:08 UTC Ballscrew size for rf-31 was Re: microstep accuracy