Siemens SINUMERIK 802D sl Programming And Operating Manual page 64

Programming
3.3 Axis movements
Figure 3-13
G2/G3 remains active until canceled by another instruction from this G group (G0, G1, ...).
The path velocity is determined by the programmed F word.
Programming
G2/G3 X... Z... I... K...
G2/G3 CR=... X... Z...
G2/G3 AR=... I... K...
G2/G3 AR=... X... Z...
G2/G3 AP=... RP=...
Note
Additional options for circular path programming are available with
CT - circle with tangential connection and
CIP - circle via intermediate point (see next sections).
Input tolerances for the circle
Circles are only accepted by the control system with a certain dimensional tolerance. The
circle radius at the starting and end points are compared here. If the difference is within the
tolerance, the center point is exactly set internally. Otherwise, an alarm message is issued.
The tolerance value can be set via machine data (see "Instruction Manual" 802D sl).
3-34
Options for circular path programming with G2/G3, with G2 as an example
; Center and end points
; Circle radius and end point
; Opening angle and center point
; Opening angle and end point
; Polar coordinates, circle around the pole
Programming and Operating manual, 06/2006, 6FC5398-4CP10-0BA0
Grinding