Re: [CAD_CAM_EDM_DRO] Re: Dimensions, 2D, 2.5D, 3D

JJ,

Most cnc machines that you will see people using on this list can do 3D.

The limit is the software. I use a high end cadcam package called AlphaCam.
The midrange version can only do 2.5D machining. By that I mean it can
generate G code for any depth of the Z axis, put only one depth for any
operation. For example if I am going to cut out a part using 3/4" red oak in
three passes, the Z axis depth is set to cut the first path at .25 inched,
followed by a pass at .5 inches and the last pass at .75 inches.

I hope that this helps.

Bob Campbell

----- Original Message -----
From: "doug98105" <dougrasmussen@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Tuesday, August 27, 2002 7:22 AM
Subject: [CAD_CAM_EDM_DRO] Re: Dimensions, 2D, 2.5D, 3D


> JJ,
>
> 2D is as you understand it to be.
>
> 2.5D & 3D as related to CNC machines appear to have no firm
> definitions. From years ago I understood 2.5D to mean the machine
> could move all 3 axes simultaneously, but only in a linear fashion.
> 3D meant the machine could move all three axes simultaneously while
> moving in a circular path. Helical interpolation (as in milling a
> thread) would be a simple example of a 3D move.
>
> Per my understanding of these definitions a machine rated as 2.5D is
> virtually unlimited in it's ability to surface workpieces in 3
> dimensions as long as the cutter path is made up of straight line
> segments.
>
> In the previous list discussion of this topic I found my definitions
> do not agree with those of some other list members.
>
> Doug
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., "JJ" <jj5412@e...> wrote:
> > This is a basic question, but could someone explain 2D, 2.5D, 3D?
> >
> > I assume 2D would work like a plotter. Moves in X and Y, with the
> tool
> > going up and down (or on and off) to fixed points.
> > 2.5D and 3D I don't understand. Is 2.5D "profiling"? I assume that
> means
> > X, Y and Z axes that can move to any position, but isn't that 3D
> also?
> > Or does 3D incorporate 4 or more axes?
> >
> > ADVthanksANCE,
> > JJ
> >
> > Be Kind, Be Careful, Be Yourself
>
>
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