Hi!
Always fun to inspire others, please let us know of your progress.
When it comes to my pendant project I concider it finished. Its not the best approach if you want to be able to change and configure a lot, then you'd better go with a keyboard and map the keys in mach3. But with that said it works great for what I intended.
The only thing that is missing is the handles on the sides (see pictures).. actually bought a 3D printer.. so I'm just lazy to not have done them yet.
So unfortunately I didnt find my arduino sketch but its built on this library:
https://sites.google.com/site/jpmzometa/arduino-mbrt/arduino-modbus-slaveOn the arduino side I'm just sending commands to the mach3 via modbus, its stored in variables, the brain decides what happens when the variables change.
Sure you could have a screen and touch interface. But I think its a lot of work with arduino.. And also i'd most definitely prefer fysical buttons when interfacing a moving cnc machine..
Just a thought from my side, if you need touchscreen interface, maybe raspberry pie could be an alternative? cheep, hdmi output, usb for interfacing touchscreens, easy to program.