
B-63782EN/01 NC FUNCTIONS 17.MEASUREMENT FUNCTIOM
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17.9 AUTOMATIC TOOL LENGTH MEASUREMENT (G37)
By issuing G37 the tool starts moving to the measurement position and
keeps on moving till the approach end signal from the measurement
device is output. Movement of the tool is stopped when the tool tip
reaches the measurement position.
Difference between coordinate value when tool reaches the
measurement position and coordinate value commanded by G37 is
added to the tool length offset amount currently used.
Compensation value = (Current compensation value) + [(Coordinates of the point at
which the tool is stopped) - (Coordinates of the programmed measurement position)]
Parameter MDC (bit 0 of number 7300) is 1.
Measurement
feedrate
Z
0
A (Start position)
Measurement position is
commanded with G37
B (Deceleration position)
C (Measurement position)
e too
stops w
en t
e approac
en
s
gna
goes on.
Rapid
traverse
Format
G90 G37 IP_ ; Absolute command
G37 is valid only in the block in which it is specified.
IP _ indicates the X_, Y_, Z_ or fourth axis.