Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 524)

Dresser/Wheel Radius Compensation
Chapter 15
15-36
There is a limit to the size that an I, K vector can modify the last
compensated block. An I, K vector can only shorten/lengthen the last
compensated block by an amount equal to one active dresser/wheel radius
(see Example 15.8). The offsets are directed towards the point of
intersection of the I, K vector and the current compensated dresser/wheel
path.
Example 15.8
Exit Move Defined By An I,K Vector But Limited To Dresser/Wheel Radius
Assume T1 radius is 3
N10 Z10.G41T1
N11 X10.Z2.I3K-10.G40;
Figure 15.28
Results of Example 15.8
Compensated path using I, K vector
Compensated path if no I, K in G40 block
Intercept line
I, K
Programmed path
Compensated path
N10
N11
r
r
r
I,K intersection here
however
compensated
path can only be
extended by one
dresser/wheel radius.
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