Siemens Sinumerik 840D sl Programming Manual page 368

Transformations
6.6 Compression of the orientation (COMPON, COMPCURV, COMPCAD)
Example
In the example program below, a circle approached by a polygon definition is compressed.
The tool orientation moves on the outside of the taper at the same time. Although the
programmed orientation changes are executed one after the other, but in an unsteady way,
the compressor function generates a smooth motion of the orientation.
Programming
DEF INT NUMBER=60
DEF REAL RADIUS=20
DEF INT COUNTER
DEF REAL ANGLE
N10 G1 X0 Y0 F5000 G64
$SC_COMPRESS_CONTUR_TOL=0.05
$SC_COMPRESS_ORI_TOL=5
TRAORI
COMPCURV
N100 X0 Y0 A3=0 B3=-1 C3=1
N110 FOR COUNTER=0 TO NUMBER
N120 ANGLE=360*COUNTER/NUMBER
N130 X=RADIUS*cos(angle) Y=RADIUS*sin(angle)
A3=sin(angle) B3=-cos(angle) C3=1
N140 ENDFOR
368
Comment
; Maximum deviation of the contour = 0.05 mm
; Maximum deviation of the orientation
= 5 degrees
; The movement describes a circle generated
from polygons. The orientation moves on a
taper around the Z axis with an opening
angle of 45 degrees.
Programming Manual, 02/2011, 6FC5398-2BP40-1BA0
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