Operation Manual

HEIDENHAIN CNC PILOT 640 121
3.10 Load monitoring (option)
Reference machining
During reference machining, the control determines the maximum
utilization and the total utilization for each monitoring zone. The
determined values are used as reference values. To calculate the limit
values for a monitoring zone, the control uses the determined
reference values and the predefined factors specified in the machine
parameters.
Select the Program Run submode and open the NC program
Activate load monitoring: Select the menu Program Run > Activate
load monitoring
Select reference machining: Select the menu Program Run >
Reference machining—the control shows the title bar with a green
background
Start reference machining: Press NC Start—the control executes the
machining operation and stores the reference data in a separate file.
After the successful completion of reference machining, the control
displays an information message.
Perform reference machining under the conditions in
which the parts will later be produced, for example, with
respect to feed rates, spindle speeds, and the type and
quality of the tools you will be using.
REFERENCE MACHINING
Program M30 or M99 to conclude reference machining. If
the program is aborted during machining, no reference
data are stored. In this case you need to execute reference
machining again.
Reference machining must be repeated if you make any
changes to your program; for example:
 Define new zones
 Delete existing zones
 Change zone numbers
 Change, add or remove axes within a zone
 Change feed rates or spindle speeds
 Change tools
 Change cutting depth values