Circular Interpolation With Radius And End Point (G2/G3, X - Siemens SINUMERIK 840D sl Programming Manual

Motion commands
9.6 Circular interpolation
9.6.3 Circular interpolation with radius and end point (G2/G3, X... Y... Z.../ I... J... K..., CR)
Function
The circular motion is described by the:
• Circle radius CR=and
• End point in Cartesian coordinates X, Y, Z.
In addition to the circle radius, you must also specify the leading sign +/– to indicate whether
the traversing angle is to be greater than or less than 180°. A positive leading sign can be
omitted.
Note
There is no practical limitation on the maximum size of the programmable radius.
Syntax
G2/G3 X... Y... Z... CR=
G2/G3 I... J... K... CR=
Significance
G2:
G3:
X Y Z :
I J K :
CR= :
Note
You don't need to specify the center point with this procedure. Full circles (traversing angle
360°) are not programmed with CR=, but via the circle end position and interpolation
parameters.
216
Circular interpolation clockwise
Circular interpolation counter-clockwise
End point in Cartesian coordinates. These specifications depend on the
travel commands G90/G91 or ...=AC(...)/...=IC(..)
Circle center point in Cartesian coordinates (in X, Y, Z direction)
The identifiers have the following meanings:
I: Coordinate of the circle center point in the X direction
J: Coordinate of the circle center point in the Y direction
K: Coordinate of the circle center point in the Z direction
Circle radius
The identifiers have the following meanings:
CR=+...: Angle less than or equal to 180°
CR=–...: Angle more than 180°
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals