RE: [CAD_CAM_EDM_DRO] Re: Excel to Gcode

That xls is pretty cool. Do you want to rotate an elliptical crossection
though? Does your tool always need to be perpendicular to the tangent of
the ellipse? I'm having trouble visualizing where you are having problems -
with your mirroring. If you don't get what you need from others, maybe a
little more explanation would help - I'm not much with CNC yet, but I'm
pretty good with XLS. Just having some trouble visualizing.

Chuck Merja
www.3rivers.net/~chuckm/index.htm

Lemelson-MIT Inventeams - http://web.mit.edu/invent/n-main.html

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-----Original Message-----
From: CAD_CAM_EDM_DRO@yahoogroups.com
[mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of wayne_j_hill
Sent: Monday, May 29, 2006 8:27 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] 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?
>






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