Which G-code is used for homing the machine?

The G-code used for homing the machine is G28. This command is specifically designed to return the machine's axes to their predefined home positions, which are typically set at the limit switches of each axis. Homing is an essential procedure in CNC machining as it establishes a known reference point for the machine's movements, ensuring accuracy in subsequent operations.

By utilizing G28, the CNC machine will move to the home position, allowing the system to calibrate its position accurately. This process can help prevent errors that could arise from inconsistent starting points or if the machine loses track of its position due to power loss or any interruption.

Other codes listed serve different purposes and do not have the same function in terms of homing. G29, for example, is usually associated with returning the machine to the last position after a G28 command has been executed. G00 and G01 are motion commands used for rapid positioning and linear interpolation, respectively, rather than for homing.