Rotation in a plane (contour rotation)

Contour rotation acts in the main plane only on the programmed axis coordinates (contour) before all other contour-influencing functionalities, i.e. all offsets and mirror-imaging operations are not influenced by the rotation and can be used as previously (*).

Rotation may also be applied within an already rotated coordinate system (CS, ACS).

A change of plane with G17/18/19 automatically deselects an active contour rotation and a warning is output.

#ROTATION ON[[ANGLE<expr>] [CENTER1<expr>] [CENTER2<expr>] ]] (modal)
#ROTATION OFF (modal)

ANGLE<expr> Rotation angle in degrees (°).

CENTER1<expr> Offset of the first main axis with respect to the center of rotation in real format

CENTER2<expr> Offset of the second main axis with respect to the center of rotation in real format

Rotation in a plane (contour rotation) 1: — Fig. 11.13: Significance of the rotation parameters in the main plane

The programmed rotation parameters can be read with the following variables:

V.G.ROT_ACTIVE Has the value 1, if a rotation is active

V.G.ROT_ANGLE Rotation angle

V.G.ROT_CENTER1 Offset of the first main axis with respect to the center of rotation.

V.G.ROT_CENTER2 Offset of the second main axis with respect to the center of rotation.

	(*) It does not make a difference, whether the shifts were programmed before or behind the ROTATION command; they always act in the axis directions of the basic coordinate system of the machine (MCS).Also the tool offsets always acts independently from[5]-2 in the axis directions of MCS.

Programming example

%L part 
N10 G0 G90 X0 Y0 
N30 G1 F5000 Y50 
N40 X75 
N50 G2 Y-50 R50 
N60 G1 X0 
N70 Y0 
N80 M29 
%ang1.nc 
N100 G53 G17 
N110 LL part 
N130 #ROTATION ON [ANGLE -45 CENTER1=10 CENTER2=100] 
N140 LL part 
N150 G21 (mirroring of X coordinates) 
N160 LL part 
N170 G18 (warning expected) 
M30

Rotation in a plane (contour rotation) 3:

Same contour like in previous part program, but within #CS of 15°.

%L part 
N10 G0 G90 X0 Y0 
N30 G1 F5000 Y50 
N40 X75 
N50 G2 Y-50 R50 
N60 G1 X0 
N70 Y0 
N80 M29 
% ang1cs.nc 
N99 #CS ON[0,0,0,0,0,-15] 
N100 G53 G17 
N110 LL part 
N130 #ROTATION ON [ANGLE -45 CENTER1 10 CENTER2 100] 
N140 LL part 
N150 G21 (mirroring of X coordinates) 
N160 LL part 
N190 #CS OFF 
M30

Rotation in a plane (contour rotation) 4:

%L Trajectory0 
N10 G54 G90 X0 Y0 
N20 G0 X75 Y-50 
N30 Y50 
N40 X-75 
N50 G3 X-75 Y-50 R50 
N60 G0 X75 
N70 X0 Y0 
N80 M29 
%ang2.nc 
F1000 
N100 LL Trajectory0 
N200 G92 G90 Y-25 
N400 #ROTATION ON [ANGLE 90 CENTER1 75 CENTER2=-50] 
N600 LL Trajectory0 
N700 G92 G90 Y25 
N900 #ROTATION ON [ANGLE=-90 CENTER1 75 CENTER2 50] 
N60 LL Trajectory0 
N70 M30

Rotation in a plane (contour rotation) 5:

%L Trajectory0 
N10 G54 G90 X0 Y0 
N20 G1 X75 Y-50 
N30 Y50 
N40 X-75 
N50 G3 X-75 Y-50 R50 
N60 G1 X75 
N70 X0 Y0 
N80 M29 
%ang3.nc 
N10 F4000 G90 
N15 #ROTATION ON 
N20 LL Trajectory0 
N30 G90 G92 Y100 
N35 #ROTATION ON [ANGLE 180] 
N40 LL Trajectory0 
N50 G90 G92 Y-100 
N55 #ROTATION ON [ANGLE 180] 
N60 LL Trajectory0 
N70 M30

Rotation in a plane (contour rotation) 6:

%L UPRG1 
N1 X0 Y0 Z0 
N10 X25 
N30 X0 
N40 Y25 
N50 Y0 
N60 X10 
N70 Y10 
N80 X0 Y0 
N90 Y10 
N100 X10 Y0 
N110 G03 I-5 J5 Y10 
N120 G1 X0 Y0 
M17 
%L UPRG2 
N2 X0 Y0 Z0 
N10 X25 
N20 G02 I0.8 
N30 G1 X0 
N40 Y25 
N45 G02 J0.8 
N50 G1 Y0 
N120 G1 X0 Y0 
M17 
%L UPRG3 
N3 G1 X0 Y0 Z0 
N10 X4 Y4 
N20 G02 I1 J1 
N30 G1 X0 Y0 Z0 
M17 
%ang4.nc 
N1 G1 X0 Y0 Z0 F1000 
N500 G92 X10 Y10 
N510 LL UPRG1 
N520 #ROTATION ON [ANGLE 0 CENTER1 25 CENTER2 15] 
N540 LL UPRG1 
N550 G92 X20 Y25 
N560 #ROTATION ON [ANGLE -35] 
N570 LL UPRG1 
N580 G92 X35 Y-10 
N590 #ROTATION ON [ANGLE=V.G.ROT_ANGLE-117] 
N600 LL UPRG1 
N610 #ROTATION ON [CENTER1 0 CENTER2 0] 
N620 LL UPRG1 
N630 #ROTATION ON [ANGLE=V.G.ROT_ANGLE+117] 
N640 LL UPRG1 
N650 #ROTATION ON [ANGLE=V.G.ROT_ANGLE+35] 
N500 G92 X10 Y10 
N510 LL UPRG2 
N520 #ROTATION ON [ANGLE 0 CENTER1 25 CENTER2 15] 
N540 LL UPRG2 
N550 G92 X20 Y25 
N560 #ROTATION ON [ANGLE -35] 
N570 LL UPRG2 
N580 G92 X35 Y-10 
N590 #ROTATION ON [ANGLE=V.G.ROT_ANGLE-117] 
N600 LL UPRG2 
N610 #ROTATION ON [CENTER1 0 CENTER2 0] 
N620 LL UPRG2 
N630 #ROTATION ON [ANGLE=V.G.ROT_ANGLE+117] 
N640 LL UPRG2 
N650 #ROTATION ON [ANGLE=V.G.ROT_ANGLE+35] 
N500 G92 X10 Y10 
N510 LL UPRG3 
N520 #ROTATION ON [ANGLE 0 CENTER1 25 CENTER2 15] 
N540 LL UPRG3 
N550 G92 X20 Y25 
N560 #ROTATION ON [ANGLE -35] 
N570 LL UPRG3 
N580 G92 X35 Y-10 
N590 #ROTATION ON [ANGLE=V.G.ROT_ANGLE-117] 
N600 LL UPRG3 
N610 #ROTATION ON [CENTER1 0 CENTER2 0] 
N620 LL UPRG3 
N630 #ROTATION ON [ANGLE=V.G.ROT_ANGLE+117] 
N640 LL UPRG3 
N650 #ROTATION ON [ANGLE=V.G.ROT_ANGLE+35] 
M30

Rotation in a plane (contour rotation) 7:

Test of relative and absolute programming:

%L contour_1 
N1 G1 G91 (all positions with G91) 
N2 X20 
N3 Y20 
N4 X20 
N5 Y20 
N6 X20 
N7 Y20 
N8 X20 
N9 Y20 
N10 X20 
N11 Y20 
N12 X5 
N13 Y-3 
N14 Y3 
N15 X-5 
N16 G90 X0 
N17 Y0 
N18 X5 
N19 Y-3 
N20 Y0 
N21 X0 
#MSG SYN["contour_1 finished"] 
M17 
%L contour_2 
N100 G1 (same contour, X with G91, Y with G90) 
N101 G91 X20 
N102 G90 Y10 (transl. offset in Y is 10) 
N103 G91 X20 
N104 G90 Y30 
N105 G91 X20 
N106 G90 Y50 
N107 G91 X20 
N108 G90 Y70 
N109 G91 X20 
N110 G90 Y90 
N111 G91 X8 
N112 G91 Y-4 
N113 G91 Y4 
N114 G91 X-8 
N115 G90 X0 
N116 Y0 
N117 X8 
N118 Y-4 
N119 Y0 
N119 Y0 
N120 X0 
#MSG SYN["contour_2 finished"] 
M17 
%L contour_3 
N200 G1 (same contour, Y with G91, X with G90) 
N201 G90 X0 (transl. offset in X is 20) 
N202 G91 Y20 
N203 G90 X20 
N204 G91 Y20 
N205 G90 X40 
N206 G91 Y20 
N207 G90 X60 
N208 G91 Y20 
N209 G90 X80 
N210 G91 Y20 
N211 G91 X11 
N212 G91 Y-5 
N213 G91 Y5 
N214 G91 X-11 
N215 G90 X0 
N216 Y0 
N217 X11 
N218 Y-5 
N219 Y0 
N220 X0 
#MSG SYN["contour_3 finished"] 
M17 
%L contour_4 
N300 G1 G90 (same contour with G90) 
N301 X0 (transl. offset in X is 20) 
N302 Y10 (transl. offset in Y is 10) 
N303 X20 
N304 Y30 
N305 X40 
N306 Y50 
N307 X60 
N308 Y70 
N309 X80 
N310 Y90 
N111 G91 X14 
N312 G91 Y-6 
N313 G91 Y6 
N314 G91 X-14 
N315 G90 X0 
N316 Y0 
N317 X14 
N318 Y-6 
N319 Y0 
N320 X0 
#MSG SYN["contour_4 finished"] 
M17 
%ang5.nc 
N5001 G0 G90 X0 Y0 F5000 
N501 #ROTATION ON [ANGLE 0 CENTER1 20 CENTER2 10] 
(Note: with angle != 0 the contours are 
( not congruent because of difference 
( of absolute and incremental movement !) 
N502 #ROTATION ON 
N503 LL contour_1 
N504 #ROTATION OFF 
N5002 G0 G90 Y0 
N5003 X0 
N505 #ROTATION ON 
N506 LL contour_2 
N507 #ROTATION OFF 
N5004 G0 G90 Y0 
N5005 X0 
N508 #ROTATION ON 
N509 LL contour_3 
N510 #ROTATION OFF 
N5006 G0 G90 Y0 
N5007 X0 
N511 #ROTATION ON 
N512 LL contour_4 
N513 #ROTATION OFF 
N5005 G0 G90 Y0 
N5006 X0 
N210 M2

Rotation in a plane (contour rotation) 8:

After selection valid rotation angular. The offsets for the rotation point may firstly be considered with the first absolute programming (G90).

%ang6.nc 
N10 G90 X0Y0Z0 G1 F200 
N20 #ROTATION ON [ANGLE 30 CENTER1 10 CENTER2 10] 
N30 X0 Y0 
N40 G3 I1 J1 F500 
N50 G01 X10 
N60 Y10 
N70 G90 X0 
N80 G90 Y0 
N90 X10 Y10 
(New rotation parameters. 
(Note: Center offset has no effect until an absolute (G90) position 
( has been programmed, the angle is effective however. 
N100 #ROTATION ON [ANGLE 10 CENTER1 -10 CENTER2 0] 
N110 G3 I1 J1 F500 
N120 G01 G91 X10 
N130 G91 Y10 
N140 G91 X-10 
N150 G91 Y-10 
(Make the new center effective by first absolute position: 
N200 G90 X0 Y0 
N210 G3 I1 J1 F500 
N220 G01 X10 
N230 Y10 
N240 X0 
N250 Y0 
M30

Rotation in a plane (contour rotation) 9:

Transforming of the absolute or relative programmed circle center point:

%ang_cent.nc 
N10 F2000 G53 
N11 G0 X0 Y0 G90 
(---------------------------------------------------------------------) 
( 4 times the same circle with different programming of circle center point) 
(---------------------------------------------------------------------) 
N12 G0 X0 Y0 G90 
N13 Y50 
N14 X-75 
N15 G3 X-75 Y-50 G161 I-75 J0 (absolute center) 
N16 G0 X0 Y0 G90 
N17 Y50 
N18 X-75 
N19 G3 X-75 Y-50 G162 I0 J-50 (relative center) 
N20 G0 X0 Y0 G90 
N28 #ROTATION ON [ANGLE 0 CENTER1 25 CENTER2 -75] 
(---------------------------------------------------------------------) 
( The same with LIN and ANG offset active (ED=0) ) 
(---------------------------------------------------------------------) 
N80 G0 X0 Y0 G90 
N90 Y50 
N100 X-75 
N110 G3 X-75 Y-50 G161 I-75 J0 (absolute center) 
N120 G0 X0 Y0 G90 
N130 Y50 
N140 X-75 
N150 G3 X-75 Y-50 G162 I0 J-50 (relative center) 
N360 G0 X0 Y0 G90 
(---------------------------------------------------------------------) 
( The same rotated by 50ø (unnecessary I / J omitted) ) 
(---------------------------------------------------------------------) 
N370 #ROTATION ON [ANGLE 50] 
N380 G0 X0 Y0 G90 
N390 Y50 
N400 X-75 
N410 G3 X-75 Y-50 G161 I-75 (J0) (absolute center, not prog. is 0) 
N420 G0 X0 Y0 G90 
N630 Y50 
N640 X-75 
N650 G3 X-75 Y-50 G162 I0 J-50 (relative center) 
N650 G0 X0 Y0 G90 
(---------------------------------------------------------------------) 
( The same rotated by 95ø ) 
(---------------------------------------------------------------------) 
N660 #ROTATION ON [ANGLE 95] 
N670 G0 X0 Y0 G90 
N680 Y50 
N690 X-75 
N700 G3 X-75 Y-50 G161 I-75 J0 (absolute center) 
N710 G0 X0 Y0 G90 
N730 Y50 
N740 X-75 
N750 G3 X-75 Y-50 G162 I0 J-50 (relative center) 
N760 G0 X0 Y0 G90 
M30

Rotation in a plane (contour rotation) 10: