how to build my own cnc machine?

Question

I wanna build my cnc machine in cheap way. how can I use an microcontroller and free cnc software to build a cnc machine?

Answer 1

Designing one is relatively cheap. Building a prototype is not so cheap. You would need to use precision linear stepper motors or other actuators and their power supplies and cooling systems and so forth.

I suppose that if you already have a lathe or milling machine you could possibly modify it by replacing the manual positioning and stock feed or tool advance controls with the above computer-controlled steppers, etc. I don't think it would do as good a job as a commercial unit. You would have to have a separate controller for each axis or each degree of freedom that the machine can work in.

Have you tried looking for a used cnc machine that someone might be replacing with a newer unit? It is rare that they would just junk them; you might be able to find a used one or a model that is no longer in production. Try contacting manufactureres. Those are my best ideas, Hope they help.

Answer 2

Well, if you want seriously light duty, you could find an old plotter printer and adapt that. You can sometimes find those free or nearly-free through Craigslist or other online resources. If you want cheap, you have to be ready to roll your own: design, fabrication, and programming. That's really what you're paying for in the ready-made machines: someone else's skullwork.

Answer 3

try getting a used one off ebay.