MITSUBISHI ELECTRIC Mitsubishi Programmable Logic Controller QD75D - Manual (Page 470)

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MELSEC-Q
11 MANUAL CONTROL
Position control by manual pulse generator operation
In manual pulse generator operation, the position is moved by a "manual pulse
generator 1 pulse movement amount" per pulse.
The current feed value in the positioning control by manual pulse generator
operation can be calculated using the expression shown below.
Current feed value = Number of input pulses × Cd.20 Manual pulse generator 1
pulse input magnification × Manual pulse generator 1 pulse
movement amount
Pr.1 Unit setting mm inch degree pulse
Manual pulse
generator 1 pulse
movement amount
0.1µm 0.00001inch 0.00001degree 1pulse
For example, when " Pr.1 Unit setting" is mm and " Cd.20 Manual pulse
generator 1 pulse input magnification" is 2, and 100 pulses are input from the
manual pulse generator, the current feed value is as follows.
100 Ч 2 Ч 0.1 = 20 [µm]
The number of pulses output actually to the drive unit is "Manual pulse generator 1
pulse movement amount/movement amount per pulse ". For example, when
" Pr.1 Unit setting" is mm and the movement amount per pulse is 1 µm, 0.1/1 =
1/10, i.e., the output to the drive unit per pulse from the manual pulse generator is
1/10 pulse. Thus, the QD75 outputs 1 pulse to the drive unit after receiving 10
pulses from the manual pulse generator.
Movement amount per pulse =
Movement amount per rotation
No. of pulses per rotation
Pr.3
Pr.2
Unit magnification Pr.4
Speed control by manual pulse generation operation
The speed during positioning control by manual pulse generator operation is a
speed corresponding to the No. of input pulses per unit time, and can be obtained
using the following equation.
Output command frequency = Input frequency
×
Cd.20 Manual pulse generator
1 pulse input magnification