Re: Re: Grizzley

Alan,
reply between text

beer@... wrote:

>
> From: beer@...
>
> On 28 Jan, CAD_CAM_EDM_DRO@onelist.com wrote:
> > Message: 4
> > Date: Thu, 27 Jan 2000 23:49:02 -0600
> > From: hansw <hansw@...>
> > Subject: Re: Grizzly
> >
> > Can't say much about Bob'Cad... I just used Acad and convert using "Ace"
> > it works fine for me...
> >
>
> Hans;
>
> I'm just started with CNC machining. The little bit of GCode I've run,
> I've written by hand.
>
> I'm now investigating software to make this all easier. BOBCad is
> pretty cool ( a friend showed me some neat tricks ), but just a little
> pricey for a guy playing at home.
>
> It was my plan to do as you do, use AutoCAD ( which I already own and
> kinda know how to use ) and some DXF to GCode conversion program.
> However, I do have a few questions.
>
> 1. How does "Ace" handle 3D , as in pockets and whatnot. Or are you
> left to manually add Z commands after the fact ?

It has an editor of sorts that allow certain coomand to be add to the
beginning and end of a conversion.
As far as I can understand it, it's only using one depth, I have to edit
the file after the fact.
I also have the MAXNC software and it does no more...

>
> 2. How do you deal with tool widths? CNCPro, which I'm using ( and
> quite like, with a few exceptions ) doesn't handle G42/G43 commands, so
> I'm really hoping you have some "magic".

Well the CNCPRO does not do this and I have no magic. I asked abut that
a while back, and it appears it's really only needed to compensate for
things like re-sharpened tools, so if your g-code is set of 1/8" and the
tool really was 3/32" you can fool the g-code interpreter by applying
the offset. It then compensates... I doubt I would ever use it. The Max
software has it.

>
> My only idea is to draw the part on the "PART" layer, offsetting it to
> the "outside" on the "TOOL" layer by half the tool width, fillet the
> corners, then DXF the TOOL layer. Extra work, to be sure.

That's exaclty what I do, I keep on layer as the MILL layer and then
offset inwards by half of the tool diameter. If the Mill Layer gest in
the way, simply hide it...

Did you trythe demo version of BobCad yet ?

regards
Hans Wedemeyer

>
> Thanks in advance.
>
> Alan
>
> --
>
> Alan Rothenbush | The Spartans do not ask the number of the
> Academic Computing Services | enemy, only where they are.
> Simon Fraser University |
> Burnaby, B.C., Canada | Agix of Sparta
>
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