Rockwell Automation 8520 9/Series CNC Lathe User 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