11.7 Reference Position Related Commands

The reference point can be used as a temporary stop position for changing the tool or workpiece during machining, reference point is the mechanical origin.

Note:

G00 or G01 speed movement can be specified in the G28 reference point return command. If G00 is selected, the system will move at G00 speed; if G01 mode is selected, the system will move at G01 speed; if it is not specified, the system will move at the speed of G00 or G01 executed by the program last. The format is as follows:

G28

G28 [G00/G01] X_Y_Z_

G28: Return to Reference Position

Format:

G28 [G00/G01] X_Y_Z_

The coordinate position in the G28 instruction format refers to the midpoint coordinate position. This command allows the tool to move back to the reference point (usually the mechanical origin) via the specified middle point by rapid positioning (G00) movement. By specifying the halfway point back to the reference point, the safety of the tool movement path can be confirmed to avoid collision with the workpiece; the position value of this halfway point can be absolute coordinates or relative increments. If only the G28 command is given without specifying any axial direction, it will not operate, and will only operate when there is a specified axis in the command.