On Thu, Jul 15, 2010 at 7:56 PM, Chris Radek <[email protected]> wrote:
> On Fri, Jul 16, 2010 at 12:28:45AM +0100, Andy Pugh wrote:
> >
> > I have had a quick look at the Motenc memory map and the Motenc HAL
> > driver, and basically it looks like all the Motenc does is count and
> > reset/latch. There is no velocity or edge timestamping.
> >
> > So, any velocity calculations would have to be done in the hal driver,
> > and thus in the servo thread and only on the basis of what is known by
> > that driver. This is likely to lead to a lack of precision when the
> > edges are only few servo threads long, or conversely there are only a
> > few encoder edges per servo cycle. However, modifying the driver
> > (which is rather simple) makes a lot more sense that writing the exact
> > same code in a comp.
>
> Thanks for looking at it.
>
> If it's the best the hardware can do, a velocity pin reporting
> dcounts/dt (with dcounts safe across reset) is perfectly fine.
>
> If you feel like giving it a shot, I'd review it (but with no
> hardware) and maybe someone with hardware would volunteer to test it.
>
> Chris
>
>
Chris;
Did I hear someone call?
I have the motenc-lite in a lathe (still).
I'll be glad to test it. I will probably need some hand holding to install
etc..
Still struggling with my first EMC2 installation (more to come though).
Thanks Guys
Don
_______________________________________________
> Emc-users mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/emc-users
>
------------------------------------------------------------------------------
This SF.net email is sponsored by Sprint
What will you do first with EVO, the first 4G phone?
Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first
_______________________________________________
Emc-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-users
