microstep accuracy was what comprises as step
Posted by
ballendo
on 2002-03-29 13:45:21 UTC
Dave,
Unless the motor, drive, and machine are matched you DO NOT get
increased "positional accuracy" from a microstep drive.
What you get is smoothness. Quietly. Positional accuracy of any
stepper is limited by the construction of the motor, which is
typically rated as expecting any FULL step to be within 3% of where
it "should" be... And many motors are 5%.
Hi-end microstepper systems used in um positioning are carefully
designed, made, matched, and integrated all the way through the
design process. Just changing the sin/cos values of the winding
current(s) to make smaller steps is not enough. Magnetic position is
not always(often) the same as the mathematical model would have us
believe.
You're damp, but so are a lot of others on this subject<G>.
Hope this helps,
Ballendo
Unless the motor, drive, and machine are matched you DO NOT get
increased "positional accuracy" from a microstep drive.
What you get is smoothness. Quietly. Positional accuracy of any
stepper is limited by the construction of the motor, which is
typically rated as expecting any FULL step to be within 3% of where
it "should" be... And many motors are 5%.
Hi-end microstepper systems used in um positioning are carefully
designed, made, matched, and integrated all the way through the
design process. Just changing the sin/cos values of the winding
current(s) to make smaller steps is not enough. Magnetic position is
not always(often) the same as the mathematical model would have us
believe.
You're damp, but so are a lot of others on this subject<G>.
Hope this helps,
Ballendo
--- In CAD_CAM_EDM_DRO@y..., "dave_ace_me" <davemucha@j...> wrote:
<Snip>
>If I am not mistaken, the Gecko uses a micro step and breaks that
>into 10 parts of a step or 1/10 step per pulse. This would mean
>that it would drive a stepper 10 times slower, but with 10 times the
>positioning accuracy of a full step drive.
<snip>
> leadscrew revolutions per stepper revolution, but by using the
Gecko,the same leadscrew speed would be achieved, AND the same
positional accuracy would be had.
<snip>
>Am I right on or all wet ? (or maybe just a little damp?)
>
>
> Dave
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