Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 471)

Tool Control Functions
Chapter 20
20-15
Tool Life Measurement Type
The control can measure the life of a tool using one of three possible
methods:
Tool Life Type Method Selected Meaning
0 time This is selected by choosing 0 as the type of tool life
measurement.
Time measures tool life as the length of time that a
cutting tool is operated at a cutting feedrate.
The value for the expected tool life is entered in units of
minutes.
1 number of times
used
This is selected by choosing 1 as the type of tool life
measurement.
Number of times used measures tool life as the number
of times that the tool is selected as the active tool.
The value for the expected tool life is entered as the
number of times the tool may be used to cut parts; this
number is per program.
Regardless of the number of times that a tool is selected
as active in a specific program, it only counts as one use
each time the program is executed.
2 distance This is selected by choosing 2 as the type of tool life
measurement.
Distance measures tool life as the distance that the tool
has been moved using a cutting feedrate.
The value for the expected tool life is entered in units of
inches or millimeters depending on the mode that the
control is operating in at the time.
For multi-axis moves, the vectorial distance traveled by
the tool is the distance used for tool life measurement.
Select the tool life type (selected as either 0, 1, or 2) on a per-group basis.
Different groups may use different tool life types however each tool in the
group uses the same tool life type.