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