Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 674)

Skip and Gauge Probing Cycles
Chapter 27
27-6
Figure 27.1
Typical Tool Gauging Configurations
Probe
Probe
radius
Tool
Probe
Probe
radius
Tool
Probe
Probe
radius
Probe
length
Tool
Case 1 Case 2 Case 3
+ Z
--X
--X
Figure 27.1 illustrates 3 typical tool gauging configurations. All 3 cases
assume that the probe is at a known, fixed point on the machine.
In Case 1, the Z axis tool offset length is being gauged, while in Case 2,
the X axis tool offset length is being gauged. In both cases:
only the probe tip radius is significant to the control in calculating the
offset adjustment
the reference position is the center of the probe ball
In Case 3, the X axis tool offset length is being gauged; and both the probe
radius and the probe length are significant to the control’s offset
adjustment calculations. In this case, the reference position is the bottom
of the probe.
Important: We do not recommend the tool gauging configuration Case 3
depicted in Figure 27.1 due to the risk of probe damage.
END OF CHAPTER