Re: [CAD_CAM_EDM_DRO] Re: EMC and Taig w/ MicroProto

John Stevenson wrote:

>--- In CAD_CAM_EDM_DRO@yahoogroups.com, Lester Caine <lester@...> wrote:
>
>
>>[snip]
>>
>>
>Lester,
>Can EMC2 run a lathe as yet ?
>
>

Yes. EMC2 runs lathes quite nicely, complete with spindle-synchronized
motion (aka threading). There have been a number of improvements in
this area recently, started in the month or two before the CNC workshop,
and still continuing.

>Also with the original EMC there was an issue with 4th axis control,
>When Art ported the EMC core over to Mach2 the 4tha xis didn't work
>correctly.
>
>

Full 6-axis control works fine with EMC2. The spec used for EMC2
development is called the "Kramer doc", it's the original NIST
specification for the RS-274NGC language (otherwise known as G-code).
The definition for A,B, and C axes is that if there's a move that
includes both linear and rotary motion, then the feedrate (F word)
defines the tooltip velocity in XYZ, and the ABC motions are set so that
they complete at the same time as the XYZ. It's effectively gearing of
the rotary axes to the cartesian move. Not much else can be done
without knowing the construction of the machine (ie, does the head tilt
or does the work tilt?)

>It took Art about 4 goes to get this running.
>has this been fixed? I ask because you may not be aware of it.
>many don't use all the features in a package and assume that because
>they are there, they work.
>
>

That can be said for alomst all software - open or closed source,
Windows or Linux based ...

>John S.
>

Hope this helps.
-Steve