2D software for newbe

[Ricardoco]

Not sure I understand it either Wilfy, my understanding was that if something was flat say like a circle drawn on a piece of paper it was 2D because it had length & height but no depth, 3D was something that had both length, height & depth so the same circle cut from a solid block of material was 3D.
2.5D was something that had width & height & the illusion of depth as used in computer games when flat objects appeared to have depth.
Problem with that is people talk about 2D machining but I can't understand how it can be 2D when you are creating a 3D shape lol

From what I understand you cannot cut true 3d with a conventional 3 axis machine without repositioning the material after an inital cut. Only 2.5D and some 3D IE: a 3 Axis machine can cut a cube that sits flat on one of its planes, it cannot however cut the same cube sitting on one of its corners and it cannot cut a sphere without a special tool ( a partail 4th axis..)


Rick