Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 394)

Chamfering and Corner Radius
Chapter 16
16-4
Use the ,R command to program a radius between two intersecting tool
paths. The R command must be programmed after a comma (,). Program
the ,R followed by the radius size in the block where the first path is
programmed. The control looks ahead to the block commanding the
second path and automatically inserts the circular rounding bock to meet
that path. This inserted circular block is always tangent to both
programmed tool paths. If the control cannot generate an arc that is
tangent to both paths with the programmed ,R, then the control generates
an error.
Block: Description:
The first corner radius always terminates at the point on the block where the rounding block
is tangent to the first block
The rounding terminates at the point where the generated rounding block is tangent
to the second rounding block.
The second rounding starts from the end point of the generated circular block and continues
on to the programmed end point of the second block.
The R-word can be programmed any where in a block as long as no space
is programmed between the ,R and the radius length.
Important: If the two motion blocks are tangent to each other, then any
corner rounding commands are ignored.
Example 16.3
Programming a Radius for a Circular Path into a Linear path.
N10Z10X30.F.1;
N20G02X10.Z10.R10,R3;
N30Z30.X10.;
16.2
Corner Radius