Re:RE: Propeller blades, was: 4-AXIS FOAM CUTTER

> Date: Sat, 9 Jun 2001 15:50:25 -0600
> From: "Tim Goldstein" <timg@...>
>Subject: RE: Propeller blades, was: 4-AXIS FOAM CUTTER

> I want to machine what I would describe
>as the front face of a propeller (one blade only). Out of your arsenal of
>programs what software would you suggest to do this. What the item actually
>will be is a prop blade form for a model air plane propeller that is then
>molded on the face of the from a balsa sheet. So the form must have both
>camber (an arch from the leading edge to the training edge) and it twists
>from one end to the other just like the face of a propeller.

Vector

If you copy paste one offset cross section with simultaneous multiple displaced copies,
rotation, and scaling, you will get a series of cross sections that fits your
definition pretty well. If you then reverse every second and connect, you will
have a tool path. (offset the first cross section by one radius, before the
Copy-Paste). That's probably the most simplistic approach(and may work
very well for your purpose). You could also define several cross sections
(possibly in an aeronautical design program), drawn precisely, connect them with a
spline or linearly, and then loft a skin surface over the wireframe form.


Best Regards, Fred Smith- IMService
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