HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 320)

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Sequential events and tool life monitoring
„ The tool life monitoring function and the function for searching the
start block trigger sequential events.
„ Assign this clock event to the tool ("tool life management"—Manual
control mode).
„ When a tool is worn-out, event 20 (global information) and event 1
are triggered. Event 1 identifies the worn-out tool. When the last
tool of an tool interchange chain is worn out, event 2 is also
triggered.
„ Define events 1 and 2 for each individual tool of the tool interchange
chain.
„ The CNC PILOT resets the sequential events at the program end
(M99).
The CNC PILOT saves the various information in variables that you can
read into the NC program (see table).
„ If an tool interchange chain is defined, program the first
tool of the chain for tool compensation and tool
diagnosis. The CNC PILOT addresses the active tool of
the tool interchange chain (see “Tool programming”
on page 121).
„ Machine dimensions: Please note the reference
points. Example: You teach-in a position value with
respect to the machine zero point. You should then
approach this machine dimension also with respect to
the machine zero point.
Information in V variables
V660 Unit count:
„ Is set to 0 during system start and when loading a new
NC program.
„ Is increased by 1 with M30, M99 and a counting pulse
(M18).
The piece counter in V660 is different from the piece
counter in the machine display.
V840..
V843 G901, G902 and G903 write the positions of the secondary
axes of the calling channel into the variables:
„ Auxiliary axis 1
„ Auxiliary axis 2
„ Auxiliary axis 3
„ Auxiliary axis 4