Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 511)

Tool Tip Radius Compensation (TTRC)
Function
Chapter 21
21-27
If the last programmed move is circular (an arc), the tool is positioned at
right angles to a tangent line drawn from the end-point of that circular
move.
Figure 21.21
Tool Path for Exit Move Arc-to-Straight Line
q
q
q
q
End-point
End-point
End-point
End-point
0 £q £ 90
90 £q £ 180
180 £q £ 270
270 £q £ 360
Programmed path
Programmed path
Programmed path
Programmed
Path
G42 G41
G41
G42
G42 G41
G41
G42
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
r
q
End-point
0 £q £ 90
Programmed path
G41
G42
r
r
r
G39.1 (Circular Generated Block) G39 (Linear Generarated Blocks)
r
q
End-point
270 £q £ 360
Programmed path
G41
G42
r
r
r
G39.1 (Circular Generated Block) G39 (Linear Generated Block)
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