Threading setup RAMPS

Setup RAMPS shield:

Connections:

The connection of the spindle index and synchronization pulse are different:

1. The spindle index pulse should be connected to INT0, PIN SCL
2. The spindle synchronization pulse should be connected to INT1, PIN SDA

---

Use the GRBL-L-Mega Ramps branch or change the compiler options your selves.

Change compiler options:

You need to select the RAMPS board in the config.h file located in the GRBL directory.

Disable the following 2 lines by placing a double slash at the beginning

#define DEFAULTS_GENERIC

#define CPU_MAP_2560_INITIAL

Enable the following 2 lines by removing the double slash at the beginning

// #define DEFAULTS_RAMPS_BOARD

// #define CPU_MAP_2560_RAMPS_BOARD

---