Re: [CAD_CAM_EDM_DRO] Best way to enlarge a DXF drawing for cutting tool paths?

Isn't ModelCAD one of DesignCAD's products? (I've got their WingMaster
program that'll generate any NACA 4, 5, or 6 digit airfoil section, and
many other named ones, as well as customized ones). Anyways, they should
have a 'parallel line' command that you can use to generate a line 1/64th "
from the original line. If you can't do that, e-mail me the DXF file(s),
and I will do it for you in DesignCAD, since it can import & export DXF's.
Anyways, I'll then e-mail a download of it (them) to you in DXF format.
But, let's do that off-list.

RayHex

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> From: Mark Roberts <mark@...>
> Regarding cutting wooden parts on a HobbyCNC 3 axis mill:
>
> What is the best way to enlarge a part on a DXF file to compensate for
> the tool width? I have parts for an airplane I wish to cut. In ModelCAD
> (or any other drawing program) if I select the part and use the "scale"
> option, and I scale the selected part by 1/2 the bit size (i.e.: I scale
> the part up 0.015625 -- 1/2 of the 1/32 inch cutting tool--), I get an
> uneven result. The length and width scaled do not even come close to the
> 0.015625 outline I am trying to achieve. All I want to do is get a
> 0.015625 outline of the part I am wanting to cut, and put that outline
> on a different layer so as to use that layer for the tool path.