I believe the original intention of 'rapid travel' was to run all axis' at
full speed to the set point, without cooridinated motion. This gave the
programmer the freedom to use that method, or they could program coordinated
motion using G0 and setting the feedrate to the rapid rate.
Brian
On Oct 25, 2011 11:39 PM, "Steve Stallings" <[email protected]> wrote:
> The EMC documentation for RS274 (RS274NGC) implies
> that G0 motion is co-ordinated motion. The original
> RS-274D specification made no such claim and the
> Peter Smid book (CNC Programming Handbook)
> states that the motion is not necessarily the
> shortest path, and is up to the machine control
> implementer. By this definition, the Bridgeport
> implementation complies with the original RS274
> specification but not RS274NGC.
>
>
> -----Original Message-----
> From: Sebastian Kuzminsky [mailto:[email protected]]
> Sent: Tuesday, October 25, 2011 12:06 PM
> To: EMC developers
> Subject: Re: [Emc-developers] 'BOSS behaviour of a G0'
>
> I agree with Jon, we should follow the RS-274D spec, not the behavior of
> some particular older controller.
>
>
> On Oct 25, 2011, at 11:04 , Jon Elson wrote:
>
> > John Thornton wrote:
> >> no, if the next Z position is higher Z moves first if the next Z
> >> position is lower Z moves last for G0 only.
> >>
> > Yes, this makes a lot of sense, especially if you are programming the
> > machine
> > from thumbwheel switches like on the first BOSS controls. But, since
> this
> > functionality is NOT defined in the RS-274D specs, and can easily be
> > programmed
> > in several G0 blocks, I'm not sure we should change behavior.
> >
> > Jon
> >
> >
>
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> --
> Sebastian Kuzminsky
>
>
>
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------------------------------------------------------------------------------
The demand for IT networking professionals continues to grow, and the
demand for specialized networking skills is growing even more rapidly.
Take a complimentary Learning@Cisco Self-Assessment and learn
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http://p.sf.net/sfu/cisco-dev2dev
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