
14. MEASUREMENT
B–63173EN–1/01
498
NOTE
1 The G31 block is always set to G01 mode. The feedrate is
specified by an F code.
2 When the measuring motion is made by utilizing the skip
signal, program a constant feedrate; otherwise, if the
feedrate changes, the measuring error will be noticeable.
With a constant feedrate, the maximum measuring error can
be calculated as follows:
ERRmax: Maximum measuring error (mm or inch)
Fm : Measuring feedrate (mm/min or inch/min)
3 Overtravel amount Qmax after skip signal has been turned
to “1” is calculated by the following:
Qmax : Overtravel amount (mm or inch)
Fm : Feedrate (mm/min or inch/min)
Tc : Cutting time constant (ms)
Ts : Servo time constant (ms) (1 loop gain)
#1
: The value becomes 28 when the skip signal SKIPP
<G006#6> is used. (Also it changes according to
the processing time of ladder program).
ERRmax = Fm × ×
60 1000
14
Qmax = Fm × ×
60 1000
11
(20
#1
+ Tc + Ts)
OPERATOR’S MANUAL
(B–63174EN)
II.4.14 SKIP FUNCTION(G31)
Note
Reference item