Siemens SINUMERIK 840DE

Programming Motion Commands
4.13 Involute interpolation (INVCW, INVCCW)
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
4-39
;
<
;<
0;<
5
Ȭ
Ȭ

%DVHFLUFOH
6WDUWSRLQW
(QGSRLQW
When paths perpendicular to the active plane are also programmed, it is possible to traverse
an involute in space (comparable to helical interpolation with circles).
Programming
INVCW X... Y... Z... I... J... K... CR=...
Or
INVCCW X... Y... Z... I... J... K... CR=...
Or
INVCW I... J... K... CR=... AR=...
Or
INVCCW I... J... K... CR=... AR=...
Parameters
INVCW Travel on an involute in clockwise direction
INVCCW Travel on an involute path in counterclockwise direction
X Y Z End point in Cartesian coordinates
I J K Center point of base circle in Cartesian coordinates
CR= Radius of base circle
AR= Arc angle (angle of rotation)
Supplementary condition
Both the start point and the end point must be outside the area of the base circle of the
involute (circle with radius CR around the center point determined by I, J and K). If this
condition is not fulfilled, an alarm is generated and the program run aborted.