Siemens SINUMERIK 840DE

Programming Motion Commands
4.13 Involute interpolation (INVCW, INVCCW)
Fundamentals
4-40 Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Note
For more information about machine data and supplementary conditions that are relevant to
involute interpolation, please see References: /FB1/, A2 section "Settings for involute
interpolation".
Example of counterclockwise involute and back as clockwise involute
Counterclockwise involute according to programming method 1 from start to end point and
back again (clockwise involute)
;  < 
; 
< 
5 
1
1
<
;1VWDUWSRLQW
1HQGSRLQW
N10 G1 X10 Y0 F5000 ;Approach start position
N15 G17 ;Select X/Y plane
N20 INVCCW X32.77 Y32.77 CR=5 I-10 J0 ;E. counterclockwise, end point,
;radius, center point relative to
;start point
N30 INVCW X10 Y0 CR=5 I-32.77 J-32.77 ;Start point is end point from N20
;End point is start point from N20,
;radius, center point relative to new
;start point is equal to previous
;center point
...