Programmed coordinate rotation ON / 3-D coordinate conversion ON

Q: What does Mazak G-code G68 do?

G68 — Programmed coordinate rotation ON / 3-D coordinate conversion ON on the MAZATROL SmoothX control (INTEGREX e-670H). Programmed coordinate rotation is performed to rotate the machining shape itself on the workpiece by rotating the workpiece coordinate system. Machine coordinate path after coordinate rotation: 1. Correlationships to other functions, and precautions 1. Coordinate rotation is valid only for the automatic operation modes (tape operation, memory operation, and MDI); it is invalid for manual rapid traverse, handle feed, or reference point (zero point) return, whether it is automatic or manual. automatic operation must not be executed for any subsequent absolute data commands. Axis movements may not describe the desired path. 2. Calculation for offset processing is performed lastly. That is, coordinate rotate processing using the designated program is performed and tool ra

Machine-specific. This G-code reference is specific to the Mazak INTEGREX e-670H / e-670H-S with the MAZATROL SmoothX control (EIA/ISO programming manual H747PB0030E). G-code availability depends on fitted options, and groups and behaviour differ between Mazak models and control generations — verify against the manual for your own machine before programming with any code.

What it does

Programmed coordinate rotation is performed to rotate the machining shape itself on the workpiece by rotating the workpiece coordinate system. Machine coordinate path after coordinate rotation: 1. Correlationships to other functions, and precautions 1. Coordinate rotation is valid only for the automatic operation modes (tape operation, memory operation, and MDI); it is invalid for manual rapid traverse, handle feed, or reference point (zero point) return, whether it is automatic or manual. automatic operation must not be executed for any subsequent absolute data commands. Axis movements may not describe the desired path. 2. Calculation for offset processing is performed lastly. That is, coordinate rotate processing using the designated program is performed and tool radius compensation, tool length offsetting, tool position offsetting, etc. follow. 3. Higher priority is given to coordinate rotation than to the mirror image function. If these two functions are selected, therefore, coordinate rotation will precede mirror image processing. 4. […]

G68 is modal (group 16) — it stays in effect until another code of the same group replaces it.

Programming format

GnG68 __R_

Address words

n : Plane selection code 17, 18, or 19
,  : Coordinates of the center of rotation [Of the three axes (X, Y, Z), specify any two that
correspond to the selected plane.]
R : Angle of rotation (positive values for counterclockwise rotation)
Set an angle from –360.000 to +360.000 degrees in 0.001 degree steps.
+R
(, )
MEP163
G69: (Coordinate rotate cancellation) This command code can be included in any block,
whether independent from or together with other command codes.
G68 Xx Yy Zz Ii Jj Kk Rr ; ............. 3D coordinate conversion mode ON
0 0 0
G69 ; ............. 3D coordinate conversion mode OFF
x y z : Coordinates of the center of rotation

Source

Mazak PROGRAMMING MANUAL for EIA/ISO PROGRAM, manual H747PB0030E, section 14-13 Programmed Coordinate Rotation: G68/G69, p. 3-11, 14-31, 14-32, 14-33, 14-34, 14-35, 14-36, 14-37, 14-38, 14-39, 14-40. Reference and explanation only — not a reproduction of the manual.

Not sure how to use it? Ask the Mazatrol assistant →