Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 444)

Programming Feedrates
Chapter 18
18-18
Exact Stop Mode (G61 - - modal)
G61 establishes the exact stop mode. The axes move to the commanded
position, decelerate and come to a complete stop before the next motion
block is executed. To cancel this mode, program G62, or G63.
Cutting Mode (G64 - - modal)
G64 establishes the cutting mode. This is the normal mode for axis motion
and is generally selected by your system installer as the default mode
active on power up. Block completes when the axes reach the interpolated
endpoint. To cancel this code, program G61, G62, or G63.
Tapping Mode (G63 - - modal)
In the G63 tapping mode, the feedrate override value is fixed at 100
percent, and a cycle stop is ignored. Axis motion commands are executed
without deceleration before the end point. The program proceeds to the
next block without checking in position status, similar to the operation of
G64. To cancel this code, program G61 or G62.
Automatic Corner Override (G62 - - modal)
In cutter compensation mode (G41/G42), the load on the cutter increases
while moving inside a corner. If the G62 automatic corner override mode
is active, the control automatically overrides the programmed feedrate to
reduce the load on the cutter. To cancel this code, program G61 or G63.
Figure 18.10
Automatic Corner Override (G62)
programmed tool path
tool center path
A
A
a b
c
a b
c