Re: Excel to Gcode

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "afogassa" <afogassa@...> wrote:

>
> Hi All,
> I'm trying to work with excel to generate a toolpath for my 4th axis.
> got a point file from rhino into excel then did the trig to find the z
> axis position and A axis angle position from the original x and Y.
> The problem is: when going past 180 degres the toolpath gets mirroed
> on top of the other 180 deg.
> I think I should out put the the degress from 0 to 360 but can't
> find a formula to do that.I'm using a circle divided into 4 so the
> angles changes from let'say; -65, 65....on every quadrant.
> Have tryed to subtract 90 deg from the quadrante but it still gets
> mirrored.
> BTW: I need to cutout odd shape windows on a ovalshape tube.
> Every high end cam software I've tryed don't want to follow a odd
> shape line on top off surface when using the rotary axis, it only
> wants to machine the Whole surface .Tryed mastercam, powermill, and
> Vector,
> any Ideas?

in both cases, you can convert the A into Y and considder the part a
flat for much of the work. That will work great if you always stay on
the centerline of the rotary.

But, the excercise might reveal clues to the answer.

I gave up on software and wrote my A axis stuff in Excel as if it were
the Y axis and everything has been working fine so far. Of course,
my needs were VERY simple.

Dave

>