FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

PROGRAMMING
15. COMPENSATION FUNCTION
B–62764EN/01
262
The difference between the coordinates of the position at which the tool
reaches for measurement and the coordinates specified by G37 is added
to the current tool length offset value.
Offset value =
(Current compensation value) + [(Coordinates of the position at which the
tool reaches for measurement) – (Coordinates specified by G37)]
These offset values can be manually changed from MDI.
When automatic tool length measurement is executed, the tool moves as
shown in Fig. 15.2 (b). If the approach end signal goes on while the tool
is traveling from point B to point C, an alarm occurs. Unless the approach
end signal goes on before the tool reaches point F, the same alarm occurs.
The P/S alarm number is 080.
Start
position
Rapid
traverse
Approach end signal ON
Position commanded
by G37
Permitted range of approach end signal
A
B
DE F
Deceleration
feedrate
(measurement
feedrate)
C
Fig15.2 (b) Tool movement to the measurement position
D Changing the offset
value
D 

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