Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 497)

Tool Tip Radius Compensation (TTRC)
Function
Chapter 21
21-13
Example 21.3
Sample Entry Move After Non-Motion Blocks
Assume current compensation plane is the ZX plane.
N01X0Z0;
N2G41T1; This block commands compensation left
N3M02; This is not the entry block since no axis motion takes place in
the current plane.
N4...; No axis motion in current plane.
N5...; No axis motion in current plane.
N6...; No axis motion in current plane.
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N999X1Z1; This is the entry move for the previously programmed G41 .
Your system installer selects in AMP the allowable number of non-motion
blocks that is to be allowed during TTRC before the entry move must be
re-initialized. See page 21-30.
For example, assume that your system installer has designated that only
two non-motion blocks can be performed. Then, if more than two blocks
following the entry move do not contain axis motion in the current plane,
the entry move is re-performed at the next block containing axis motion in
the current plane.
Example 21.4
Too Many Non-Motion Blocks After Entry Block
Assume current plane to be the ZX plane.
N1X0.Z0.;
N2G41T1X1.Z1.; Entry move TTRC left.
N3; No axis motion in current plane.
N4...; No axis motion in current plane.
N5X4Z-4; New entry move TTRC left.