Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 489)

Tool Tip Radius Compensation (TTRC)
Function
Chapter 21
21-5
Figure 21.3
TTRC Direction
G42; Compensation
right
G41; Compensation
left
G40; Compensation
cancel
Programmed tool path
and direction
Important: The TTRC function is not available during any of the thread
cutting cycles. TTRC must be canceled before any threading routine can
be performed.
Program the TTRC function with this format:
G41(or G42)X ___ Z ___ T ___ ;
Where : Is :
G41(or G42) TTRC direction, G41=left, G42=right
X, Z End-point of entry move into TTRC. Program an entry move only on
axes in the currently active plane. Axis motion must take place in
order for TTRC to be active on an axis.
T Designates the offset numbers and pulls data: 1) from the wear and
geometry tables for the tool radius, and 2) from the geometry table for
tool orientation. See chapter 20 for information on programming a
T-word. The T-word is optional in the G41 or G42 blocks. The T-word
may also be designated in any previous or following program block.