HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 100)

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3.7 Load Monit
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ri
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3.7 Load Monitoring
The load monitoring function of the CNC PILOT compares the current
torque, or the values for the work of the drives, with the values from
a reference run.
If “torque limit 1” or the “work limit” is exceeded, the CNC PILOT
marks the tool as worn out. If torque limit 2 is exceeded, the CNC
PILOT assumes tool breakage and stops the machining process (feed
stop). Violations of limit values are reported as error messages.
The load monitoring identifies worn tool in the “tool diagnosis bits.” If
you are using the tool life monitoring function, the CNC PILOT will
manage the replacement of tools. As an alternative, you can evaluate
the tool diagnosis bits in the NC program.
The load monitoring function defines the monitoring zones and the
drives to be monitored (G995) in the NC program. The torque limits of
a monitoring zone depend on the maximum torque determined by the
reference machining cycle.
The CNC PILOT checks the values for torque and work in each
interpolator cycle and displays the values in a time reference grid of
20 ms. The limit values are calculated from the reference values and
the limit factor (control parameter 8). You can later change the limit
values in “Edit load parameters.”
„ Make sure that the conditions for reference machining
comply with those for production (feed-rate/speed
override, tool quality, etc.).
„ The CNC PILOT monitors up to four components per
monitoring zone.
„ Using “G996 Type of load monitoring,” you can control
the hiding the rapid traverses paths and the monitoring
of torque and/or work.
„ The graphic and numeric displays are relative to the
rated torque values.