G28 performs a reference run (homing). During this process, the printer moves each axis to its limit switch or sensor to determine the zero position.

• Homing all axes

• Homing individual axes only

• Configure sequence and behaviour in the firmware

Typical parameters:

G28

Only axis X home

G28 X 

X and Y home

G28 X Y  

Important to know

RepRap Firmware

In RRF, G28 is always linked to macros:

• homeall.g
• homex.g
• homey.g
• homez.g

These files are located in the /sys folder.

Klipper

In Klipper, homing can be overridden using Homing Override.