Re: [CAD_CAM_EDM_DRO] Re:Re: Re: 4th Axis Concept (long)

Fred Smith wrote: Yes, unless you can set up a quadrature encopder that
will always

> keep track of the location after homing. That way you would only
> have to worry about the change over from free wheeling to controlled
> motion.

As far as I know, FlashCut (which is what I would apply this to) will run for
hours keeping track of degrees. The problem is, the way I understand it, is
that it keeps counting up, never starting back at 0 after 360. Don't know if
thats the norm....... I am not a rocket scientist !

But I do know that I don't think I could keep my head straight if I had to
conduct a routine at, for example, 48,902,849,586,987,498,905,889,903
degrees! (give or take a few)

Maybe an option in the control would be nice,,,, you select which method of
tracking you want. Maybe someone already has that. Maybe it would be a good
thing to add....... Maybe I'm just Nuts !

Thanks for all your input !

Chris

>
>
> >
> > The 2 things I do not really like (man, I am hard to please) is (1)
> Indexing the part AFTER setting Zero............ Not the worst, but
> could be beneficial to set it after for pre-finished parts.
> >
> > and (2), now I would have to learn about servos ! (Oh,
> honey,...... I need MORE money!)
> >
>
> Aren't there both stepper and servo drivers available from Geckodrive?
> How fast can you rotate the spindle with the servos under controlled
> motion? I would think the practical limit would only be the ability
> to process the encoder feedback. I would get the answer to this
> question before I ***ever*** considered a mechanical solution to this
> problem. While it's fun to make the parts, it's not fun to replace
> them in the field.....ever.
>
> Best Regards,
>
> Fred Smith
> IMService
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
>
> Post messages: CAD_CAM_EDM_DRO@yahoogroups.com
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...
> Moderator: jmelson@... timg@... [Moderator]
> URL to this page: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
> bill,
> List Manager
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/