Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 205)

Running a Program
Chapter 7
7-29
CAUTION: If the Jog Retract function is deactivated during its
execution (performing a control reset, E-Stop, etc.), attempting
to return the tool by pressing
<CYCLE START>
can cause the Jog
Retract function to abort. The program returns to the start point
of jog retract along a linear path. In the event that Jog Retract is
deactivated during execution, we recommend that the cutting
tool be jogged to the point from which jog retract was started
prior to pressing
<CYCLE START>
to avoid possible part or tool
damage.
To perform a jog retract operation:
1. Press the
<CYCLE STOP>
or activate
<SINGLE BLOCK>
feature button
to stop program execution.
2. Press the <JOG RETRACT> button. The light inside the button turns on
to indicate that the function is active.
3. Move the cutting tool from the workpiece using either continuous
jog, incremental jog, or HPG jog operations (see page 4-1 for
jogging information.)
4. Inspect and change the tool or tool offset as desired. Details on how
to do this are on page NO TAG.
5. After completing the desired inspection or tool change, press the
<CYCLE START>
button. Any tool offset changes you have made
become active when the cycle start is requested. The tool returns to
the location where jog retract began, following the same path used
when you jogged the tool away from the work piece (+ or -- any new
tool offset values).
You can press
<CYCLE STOP>
during the tools automatic return to the
jog retract start position. When this is done, the tool can be retracted
from this point using jog moves and the control adds these moves to
any remaining jog retract steps that have not yet been returned.
6. Once the cutting tool is fully returned from a jog retract operation, the
control continues on in the part program unless in single block mode.
If in single block mode, the control goes to the cycle stop state when
the return from jog retract is completed. Press
<CYCLE START >
again to resume program execution.