I have installed GRBL 3 axis on an Arduino UNO, it works fine.
I am building a 5 axis CNC Milling machine and want to use the MEGA 5X to control it. It has installed, the UGS says it is moving but there is no output. Also can anybody give me a pinout for the 5X version as I can only find the one for standard MEGA 2560 GRBL.