Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 348)

Coordinate Control
Chapter 13
13-6
Figure 13.2
Diameter/Radius Programming
X
10
15
5
Z
Diameter Radius
Programming Programming
Mode (G08) Mode (G07)
G90G08X12.; G90G07X6
or or
G91G08X-8.; G91G07X-4.;
6
12
10 20
Important: The following must always be programmed as radius value,
regardless of whether G07 or G08 is active:
Most of the X axis infeed amounts or similar values (addresses D, I, K)
used in Simple and Compound fixed cycles (G70 - G78).
Center point designation (addresses R, I, K) for circular interpolation.
Feedrates in the X-axis direction (change in radius per revolution G95
or radius per minute G94).
The threading cycle parameter E or F when face threading is being
programmed.
Position displays are impacted by radius diameter mode. The
diameter/radius axis selected in AMP displays either an R or a D next to it,
indicating which mode it is currently in and represented on the CRT. This
even applies to the machine coordinate system (absolute display).