Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 395)

Axis Motion
Chapter 12
12-23
Chamfering
Program a ,C--word to grind a chamfer between two consecutive
intersecting paths. The chamfer word C must follow a comma (,) and is
programmed in the first of two paths to be connected by the chamfer.
The value programmed with the ,C determines the chamfer size:
if the path is linear, then the distance programmed with the ,C--word is
measured from the intersection of the paths to the point where the
chamfer begins or ends
if the path is circular, then the chamfer distance programmed is applied
as a chord length on the arc measured from the intersection between the
two paths
This applies regardless of the combination of arcs and lines to be
chamfered.
The ,C--word can be programmed anywhere in a block as long as no space
is programmed before or after the ,C--word. The value programmed with
the ,C is an incremental distance not affected by radius or diameter
programming (G07 or G08).
Example 12.13 illustrates a chamfer between two linear paths. This
example first establishes diameter programming mode with the G08 block.
Diameter programming mode is available on cylindrical grinders only.
Example 12.13
Basic Chamfering Using ,C
N10G90G08;
N20Z25.0X0.0F.1.;
N30G01X20.,C2.0;
N40Z5.0;
Figure 12.14
Results of Chamfering Using ,C from Example 12.13
X
Z
2.0
20.0
12154-I