Siemens SINUMERIK 840D sl Programming Manual page 284

Transformations
7.6 Compression of the orientation COMPON (A..., B..., C..., THETA)
Example: "Compressor for orientations"
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 generates a smooth motion of the orientation.
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
N110 FOR COUNTER = 0 TO NUMBER
N120 ANGLE= 360 * COUNTER/NUMBER
N130 X=RADIUS*COS(ANGLE)Y=RADIUS*
SIN(ANGLE) A3=SIN(ANGLE)
B3=(ANGLE) C3=1
N140 ENDFOR
...
7-46
;Maximum deviations of the contour:
;0.05 mm
;Maximum deviations of the orientation:
;5 degrees
;The movement describes a circle
;generated from polygons.
;While the orientation moves on a taper
;around the Z axis with an opening angle
;of 45 degrees.
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
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