Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 499)

Tool Tip Radius Compensation (TTRC)
Function
Chapter 21
21-15
Example 21.5 gives some sample exit move program blocks.
Example 21.5
Type A Sample Exit Moves
Assume the current plane is the XZ plane and TTRC is already active
before the execution of block N100 in these program segments.
N100X1.Z1.;
N110X3.Z3.G40; Exit move.
N100X1.Z1.;
N110G40;
N120X3.Z3.; Exit move.
N100X1.Z1.;
N110G40;
N120; No axis motion in the current plane.
N130...; No axis motion in the current plane.
N140...; No axis motion in the current plane.
” ”
”
”
N200X3.Z3.;
Exit move.
N100X1.Z1.;
N110...; No axis motion in the current plane.
N120...; No axis motion in the current plane.
N130...; No axis motion in the current plane.
” ”
” ”
N200G40X3.Z3.; Exit move.
All of the program blocks in Example 21.5 produce the same exit move
provided the number of non-motion blocks in the compensation mode has
not exceeded a value selected by your system installer in AMP.
The exit of the cutting tool for type A TTRC takes the shortest possible
path to the endpoint of the exit move. This path starts at right angles to the
left or right of the endpoint (depending on G41 or G42) of the last move in
the currently defined plane. You can redefine this start-point by using an I-
and/or K-word as described later in this section. The end-point of the exit
move is no longer offset to the left or right.