Mitsubishi FX3U-20SSC-H User Manual page 153

FX -20SSC-H Positioning Block User's Manual
3U
• The manual pulse generator inputs two-phase pulses (A-/B-phase) at 1 edge count.
- Only a differential output type manual pulse generator is connectable.
- Operation from the manual pulse generator is always counted.
The "current MPG input value" is applicable to monitor the pulses from the MPG when the operation is
not in MPG mode.
A-phase
B-phase
• The operation speed is proportional to the frequency of pulse strings from the manual pulse generator
according to the manual pulse input magnification.
In addition, the override setting is invalid.
Manual pulse generator
Input pulses
(frequency, pulse quantity)
A-phase
B-phase
2-phase pulses
Frequency within 100kHz
- The following equation provides output pulses to 20SSC-H.
Input pulses (frequency, pulse quantity)
from manual pulse generator
- If the pulse generator magnification is smaller than 1/1, one pulse is output for every multiple input
pulse.
Therefore, the frequency of output pulses is low while the pulse quantity is small.
If the manual pulse input magnification is larger than 1/1, multiple pulses are output for each input pulse.
Therefore, the frequency of output pulses is high while the pulse quantity is large.
If the manual pulse input magnification is larger than 1/1, the motor rpm for each input pulse becomes
larger, causing rough positioning accuracy.
ON
OFF
+1 +1
20SSC-H
Manual pulse generator
Input pulses
(frequency,
pulse quantity)
manual pulse input
X
magnification
8.3 Manual pulse generator operation
-1 -1
Command
(output
input magnification
pulses)
Numerator
Output
pulses
Denominator
Manual pulse input
magnification (numerator)
Manual pulse input
magnification (denominator)
8 Manual Control
Servo
amplifier
AC Servo
motor
147
1
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5
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7
8
9
10