G28, G28.1: Return to a Predetermined Position

The G28 command should only be used when homing has been performed and the desired position has been saved with the G28.1 command.

The G28 command uses the values stored in memory as the coordinates X, Y, Z, A, B, C, U, V, W of the endpoint to move. Parameter values are absolute machine coordinates. Command G28 performs rapid linear motion.

The G28 axes command performs rapid linear movement to the position defined by axes, taking into account all offsets, and then performs rapid linear movement for the axes to the absolute position specified by the values stored in memory. Axes not specified in axes will not move.

The G28.1 command stores the current absolute position in memory.