Mitsubishi Electric C80 Series Instruction Manual page 450

C80 Series Instruction Manual
13 Appx.2: Other Functions for Reference
Conversion of the F1-digit feedrate changing with handle operation
Once the F1-digit feedrate is changed with manual handle, the changed feedrate is valid until parameter is changed or the
power is turned OFF. Changed feedrate can be checked only during the operation. Note that if the parameter "#1246
set18(bit16)" (switch over of the F1-digit feedrate changing method) is set to "1", even after the power is turned OFF, op-
eration is kept at the changed feedrate because the parameter of F1-digit feedrate has been changed. In this case, if the
screen is not switched, the changed parameter values are not reflected to the display.
The increase/decrease amount per handle gradient is expressed with the following equation.
∆F = ∆P× FM
K
(Example) When the handle scale unit is to be made ±10mm/min.
If FM is made 3600mm/min, feedrate change constant (K) must be set to "360" according to the following formula.
3600
∆F = 10 = 1 ×
Note
(1) If F1-digit feedrate changing valid signal is turned ON when F1-digit feed is commanded and changing feedrate with the
manual handle is valid, it is clamped at the upper limit of F1-digit feedrate if the F1-digit feedrate is greater than the
upper limit of F1-digit feedrate.
(2) When the F1-digit feedrate is 0 with the handle operation during the F1-digit feedrate command, the alarm "M01 F1-digit
feedrate zero 0104" will occur. This alarm can be eliminated when the F1-digit feedrate is set in larger value than 0 with
the handle operation.
(3) When K is 0, the speed is not changed.
Precautions
(1) The number of manual handle pulses is 1 pulse per scale unit regardless of the scaling factor.
(2) During a F1-digit feed command, the F1-digit feed number and F1-digit feed command signal are output as the PLC
signals.
(3) When F1. to F5. (with decimal point) are assigned, the 1mm/min to 5mm/min (direct numerical value command) are
established instead of the F1-digit feed command.
(4) When the commands are used with inch command, one-tenth of the feedrate set correspond to F1 to F5 serves at the
assigned speed inch/min.
(5) When the commands are used with the millimeter or degree units, the feedrate set to correspond to F1 to F5 serves as
the assigned speed mm (°)/mm.
(6) When both the F1-digit feedrate changing and the manual speed command are present, the manual speed command
will have the priority.
(7) In the synchronous tapping command, the speed cannot be changed with the handle.
∆P: Handle pulse (±))
FM: Upper limit of F1-digit feedrate (#1506 F1_FM)
K: F1-digit feedrate change constant (#1507 F1_K)
K
425 IB-1501453-C