RE: [CAD_CAM_EDM_DRO] Windows PC as CNC controller

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Lawrence Gran
> Sent: Thursday, October 12, 2006 12:48 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: RE: [CAD_CAM_EDM_DRO] Windows PC as CNC controller
>

Stuff deleted

>
> Food for thought. The typical design program works in "Part"
> space, and the
> coordinates are of the actual surface of the part. Then an ideal Cam
> program converts that into a toolpath, call that "tool tip"
> space. These
> current programs also convert that into machine space. Now
> the easiest
> machine is one that matches the typical coordinate systems,
> which exerts
> force for the CNC machine designers to build "XYZ" 3 axis
> macines in order
> not to deal with a CAM problem. Indeed, all of the plans
> which I have found
> are exactly this type. Perhaps the tail and the dog?
>
> How would you split up a CAM into A. Part space to tool tip
> space, and B.
> Tool tip space to machine space?
>

Actually, it is more like "user space" and "machine space"

When staring at a computer screen, scratching your head and designing a
part, you do not need to know where X0 Y0 Z0 are. All you are concerned with
is making the part look like you want it to.

When you translate your part into "machine space", you map your part into
the Cartesian Coordinate space of that specific machine.

The tool-tip space is not a separate entity. It is a component of User
Space; put there to make things easier for the user and it allows the user
to check for possible tool-path problems.


Dave