Circular Interpolation With Opening Angle And Center Point - Siemens SINUMERIK 840D sl Programming Manual

Motion commands
9.6 Circular interpolation
9.6.4 Circular interpolation with opening angle and center point (G2/G3, X... Y... Z.../
I... J... K..., AR)
Function
The circular movement is described by:
• The opening angle AR = and
• The end point in Cartesian coordinates X, Y, Z or
• The circle center at addresses I, J, K
Syntax
G2/G3 X... Y... Z... AR=
G2/G3 I... J... K... AR=
Significance
G2:
G3:
X Y Z :
I J K :
AR= :
=AC(...):
Note
Full circles (traversing angle 360°) cannot be programmed with AR=, but must be
programmed using the circle end position and interpolation parameters. The center point
coordinates I, J, K are normally entered in incremental dimensions with reference to the
circle starting point.
You can program the absolute center point dimensions in relation to the workpiece zero
block-by-block with: I=AC(...), J=AC(...), K=AC(...). One interpolation parameter I, J, K with
value 0 can be omitted, but the associated second parameter must always be specified.
218
Circular interpolation clockwise
Circular interpolation counter-clockwise
End point in Cartesian coordinates
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
Opening angle, range of values 0° to 360°
Absolute dimensions (non-modal)
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals