Rotation in a plane (contour rotation)

In the main plane, contour rotation acts exclusively on the programmed axis coordinates (contour) before all other functions influencing the contour, i.e. all offsets and mirroring are not affected 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 [°]

CENTER1<expr>

Offset of the first main axis relative to the centre of rotation in [mm, inch]

CENTER2<expr>

Offset of the second main axis relative to the centre of rotation in [mm, inch]

Significance of rotation parameters in the main plane
Significance of rotation parameters in the main plane

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

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

V.G.ROT_ANGLE          Rotation angle

V.G.ROT_CENTER1      Offset of the first main axis relative to the centre of rotation

V.G.ROT_CENTER2     Offset of the second main axis relative to the centre of rotation

Notice

notice

(*) It makes no difference whether the offsets (e.g. G54, G92 etc. ) were programmed before or after the ROTATION command; they always act in the axis directions of the basic coordinate system of the machine (MCS).

In addition, tool offsets always act independently of P-TOOL-00010 in the axis directions of the MCS.

Programing Example

prg_example

Rotation in a plane (contour rotation)

%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 (mirror X coordinates)

N160 LL part

N170 G18 (warning expected)

N190

M30

Same contour as in the previous 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 (mirror X coordinates)

N160 LL part

N190 #CS OFF

M30

%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

%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

%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

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

After selecting 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: Centre offset has no effect until an absolute (G90) position

(has been programmed. However, the angle is effective.

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 centre effective by first absolute position:

N200 G90 X0 Y0

N210 G3 I1 J1 F500

N220 G01 X10

N230 Y10

N240 X0

N250 Y0

M30

Transforming the absolute or relative programmed circle centre point:

%ang_cent.nc

N10 F2000 G53

N11 G0 X0 Y0 G90

(---------------------------------------------------------------------)

(4 times the same circle with different programming of circle centre point)

(---------------------------------------------------------------------)

N12 G0 X0 Y0 G90

N13 Y50

N14 X-75

N15 G3 X-75 Y-50 G161 I-75 J0 (absolute centre)

N16 G0 X0 Y0 G90

N17 Y50

N18 X-75

N19 G3 X-75 Y-50 G162 I0 J-50 (relative centre)

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 centre)

N120 G0 X0 Y0 G90

N130 Y50

N140 X-75

N150 G3 X-75 Y-50 G162 I0 J-50 (relative centre)

N360 G0 X0 Y0 G90

(---------------------------------------------------------------------)

(The same rotated by 50° (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 centre, 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 centre)

N655 G0 X0 Y0 G90

(---------------------------------------------------------------------)

(The same rotated by 95°)

(---------------------------------------------------------------------)

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 centre)

N710 G0 X0 Y0 G90

N730 Y50

N740 X-75

N750 G3 X-75 Y-50 G162 I0 J-50 (relative centre)

N760 G0 X0 Y0 G90

M30