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There are dozens of free or inexpensive CAD and CAM programs to play with and lots of books on the subject. Of course, having access to the software and hardware you want to program is helpful, but...

Are you referring to NC programming (gcode) or just programming in general? There are many options for the latter. I've been a programmer for 25 years.


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Someone made a complete 1911 using DMLS (laser sintering).

https://blog.solidconcepts.com/industry-highlights/worlds-first-3d-printed-metal-gun/

Mach3 is notorious for these kinds of issues, particularly with high acceleration. Other causes might be your stepper drivers overheating or shaft couplers slipping.

Aubrey,
I too have been looking at building a hardware-based motion control /G-code interpreter using PIC or similar microcontroller or possibly some other PLC. I've been intending to start this...

I just picked up the CNC Programming Handbook by Peter Smid. It looked like a good reference. Any thoughts on this book?