Re: Excel to Gcode

Maybe you can get some pointers from this 4th axis routine from Dr.
Dan Statmen program.

http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/StatmanDesigns/

--- 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
> mirroed.
> 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?
>