Siemens SINUMERIK 808D Programming And Operating Manual page 25

Direction of rotation of the arc:
Programming of circular movements
ISO mode offers two possibilities for programming the circular movements.
The circular motion is described by the:
● Center point and end point in the absolute or incremental dimension
● Radius and end point in Cartesian coordinates
For a circular interpolation with a central angle <= 180 degree, "R > 0" (positive) is to be programmed.
For a circular interpolation with a central angle > 180 degree, "R < 0" (negative) is to be programmed.
Circular interpolation with the specification of the radius R:
Feed
In the circular interpolation, the feed is programmed in the same way as for the linear interpolation (see Section "Linear
interpolation (G01) (Page 22)").
Programming and Operating Manual (ISO Turning/Milling)
01/2017
25