CAD CAM EDM DRO - Yahoo Group Archive

Re: SLA7062 Sync Mode (was New Article bla bla)

on 2006-05-08 12:39:16 UTC
> I've always heard that microstepping (anything higher than
> half-stepping) does not improve positional accuracy, it only serves to
> reduce mid-band resonance by smoothing out the step impulses. The
> holding torque at microstep positions is very low, and the actual
> position is not linear, so even in very lightly loaded conditions it is
> necessary to carefully profile each stepper to map the position of the
> motor at microstep positions.

The concern is that when running in microstepping mode and then
changing modes for no mechanical reason, you *might* jump to the
nearest half step when you return (or when you exit)

the extreemly rare possibility is that each and every occurance will
be in one direction.

*IF* every departure were on the same direction, *then* you *might*
see some accumulative errors.

Sounds like empirical testing is in order.

Dave

Discussion Thread

Phil Mattison 2006-05-08 09:48:24 UTC [CAD_CAM_EDM_DRO] SLA7062 Sync Mode (was New Article bla bla) John Dammeyer 2006-05-08 10:05:59 UTC RE: [CAD_CAM_EDM_DRO] SLA7062 Sync Mode (was New Article bla bla) Dan Mauch 2006-05-08 10:21:20 UTC Re: [CAD_CAM_EDM_DRO] SLA7062 Sync Mode (was New Article bla bla) Codesuidae 2006-05-08 10:36:45 UTC Re: [CAD_CAM_EDM_DRO] SLA7062 Sync Mode (was New Article bla bla) jeffalanp 2006-05-08 10:57:41 UTC Re: SLA7062 Sync Mode (was New Article bla bla) Alan Marconett 2006-05-08 12:17:35 UTC RE: [CAD_CAM_EDM_DRO] LMD18245, Gecko MULTIPLIER, and SLA7062 Sync Mode Codesuidae 2006-05-08 12:29:37 UTC Re: [CAD_CAM_EDM_DRO] Re: SLA7062 Sync Mode (was New Article bla bla) turbulatordude 2006-05-08 12:39:16 UTC Re: SLA7062 Sync Mode (was New Article bla bla) jeffalanp 2006-05-08 12:47:06 UTC Re: SLA7062 Sync Mode (was New Article bla bla) jeffalanp 2006-05-08 13:23:08 UTC Re: SLA7062 Sync Mode (was New Article bla bla) John Dammeyer 2006-05-08 14:05:55 UTC RE: [CAD_CAM_EDM_DRO] LMD18245, Gecko MULTIPLIER, and SLA7062 Sync Mode ballendo 2006-05-08 20:28:58 UTC OT. The ULTIMATE truth of CNC wasRe: SLA7062 Sync Mode ballendo 2006-05-08 20:33:39 UTC Re: SLA7062 Sync Mode (was New Article bla bla)