CNC Upgrade :: Electronics

This machine is based around a smoothstepper control board driving gecko stepper motor drivers. On the pc end of things gcode is processed by mach4. It’s an interesting relationship between these three companies as the lines of support are pretty gray. I had some issues during the build and its amazing how on the back-end their engineers all seem to know each other. In particular the smoothstepper guys were super helpful on some issues that wen’t pretty deep into mach4 territory.

I also just wanted to say that you’ll pay a bit more for the gecko drivers, but their support is top notch. I blew up a board due to ignorance, and they replaced it without even an admonishment!

D-rail rookie here missed that common ground bar on his second-hand components. Shorted out all the outputs from the gecko driver. Pro tip :: that lets the magic smoke out.

I did as much of the wiring on a backer-board on my workbench as I could before mounting the panel in the back of the machine. The stepper drivers need a heatsink, and I had this one in my garage for 10+ years. Originally it was going to be for a home theater amplifier.

I 3d printed up a bracket for the smoothstepper, and even printed some cable management loops. On my last build 3d printers really weren’t a thing so maybe i went overboard, but this was pretty fun. Used a lot of ferrules which I learned about volunteering at the high school for First Robotics. Nice to cross pollinate skill sets!

We bring in 220 on the left, which goes through a big contactor, with only the 5v rail-mount power supply always being powered. The contactor is initiated through a the aircraft toggle mounted on the estop box. That basically turns whole machine on/off. The limit switches on the machine were 24v so i had to solder inline resistors so they would work with the 12v inputs on the smoothstepper.