4. Motion Control Instructions 4.8.3.2 G91: Relative Mode Function: After G91 is executed, the terminal position of each axis in G code is counted in incremental method beginning from the current position and G90 can be used to switch into the absolute mode. Format: N_G91 Parameter Explanation: Example: N_: The row number of G code in NC program The initial positions of axis X and Y are both 3000 units and the axis parameters are both default values. The G codes to be executed are as follows: N0 G91 N1 G0 X6000 Y6000 After G codes are executed, the Y/X curve for the whole movement process is shown below: Y Position 9000 P2 3000 P1 X Position O 3000 9000 4-186 DVP-MC operating manual