Re: [CAD_CAM_EDM_DRO] Re: Help needed with G code

I always thought that the "I" parameter related to the X axis, and the "J"
to the Y axis, and the "K" to the Z axis. Then, if the G19 gave a plane in
the Y-Z plane, you'd use the "J" word and "K" word, but not the "I" word,
as it would be meaningless. Or is that not how the parameters are used?
(I've never done arcs in other than the X-Y plane). Also (unless this is a
lathe you're talking about), how are you going to prevent the cutting tool
from gouging at the beginning and end of the cut. i.e. you'll start out
with a concave radius equal to the tool radius, then as you transition up,
and over the top of the arc, the surface will 'flatten' out, then
continuing on through the rest of the arc, will become concave again. (I've
long since deleted the original post, so I no longer know what I'm talking
about).

RayHex

----------

> From: Jon Elson <elson@...>

<<snip>>

> I think it is pretty clear that your CNC software really doesn't support
> arcs
> except in the XY plane. I'm assuming you did use a G19 first to select

the

> correct plane of arc motion. You really should get an error message if

you

> have selected G19 and then try to make any arc move where an I word

exists.

> Any movement in the X axis would mean a linear move in X, and the J and K
> words specify the distance to the arc center in Y and Z respectively.
>
> Jon
>