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Thanks guys. Some of the software mentioned will import a pdf file into CAD/CAM that can be tweaked, then exported to G-Code. I don't need a scanner, but it would be useful if my flatbed scanner will produce a 1:1 pdf file. It will scan to pdf, but I'm not sure if it's an exact 1:1. That will be easy to test.

Thanks again guys.
Chas.

I'm going to build a CNC machine for special projects using this design. (This guy is great, especially for a someone who know little about machining and nothing about CNC.) I'm also going to use Arduino with a GRBL shield as the controller. My machine will not be for engraving, but his design should work fine.

My question is about creating G code for the controller. I understand from David's videos that SpruCam software can take a CAD file and convert it into G code, but I need to know if there is a way to scan a part as a two dimensional image into a CAD program, then export it to SpruCam or some similar software. (I also don't know the price of SpruCam, but I suspect it might be pretty high.) I don't know CAD and I guess I could learn, but I can't help but think someone has come up with a way to scan a the part into a CAD program.

Any input would be greatly appreciated.
Chas.

Edit to add: I'm not talking about 3D scanners like I've had experts do for us in cases for accident reconstruction, etc. I'm thinking more like a photocopier that will generate a CAD file.