In this video, i show how to upload GRBL firmware to Arduino mega by using arduino IDE. And how to control 5 axis CNC with GrblGru.
1. grblMega5X : https://github.com/fra589/grblMega5X
2. Use latest version of Arduino IDE : https://docs.arduino.cc/software/idev1
3. Grbl Gru : https://www.grblgru.com/