Re: EMC rotary axes

From my understanding, Mach1 takes the average of Z from one move to
the next but not the influence on radius of a change in Y.
When it comes down to it, Art's solution to the rotary/linear
feedrate problem works extremely well.
I now use Mach1's feedrate solution for any rings, etc. and my own
calculations for 5-axis work, there's a video clip of some 5-axis
routing controlled by Mach1 in the Master5 file section;
http://groups.yahoo.com/group/Master5/files/5-axis%20Video/
this is done just using standard Feedrate (as oppossed to the inverse
feedrate via G93) which works fine provided you know how the F valuse
is interpreted.

Rab Gordon,
Rainnea,
http://www.rainnea.com/cnc.htm

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:
>
>
> Tim Goldstein wrote:
>
> >My limited understanding is that Art uses the middle of the Z
position for
> >each move as the current radius. The Z value you enter is just to
give Mach1
> >a place to track the radius from.
> >
> >
> I'm not too sure I understand. The way I might want to use this
is as
> an A axis, ie. parallel to the
> X axis. Now, in the simple case, where the Y axis is such that the
> spindle (Z axis) ir right over
> the A axis, then Z moves directly change the radius. You could
easily
> make the demand that
> Y=0, Z=0 is the origin of the A axis. Then any moves in the Y and
Z
> axes can be easily converted
> into radius from the A axis. Is this what you meant above?
>
> Jon
>
> >----- Original Message -----
> >
> >
> >>Ahh, indeed, this is what we need, too. But, if the other axes
are
> >>moving in coordination with
> >>the rotary axis, then the radius could be changing throughout the
move.
> >>
> >>