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5. PARAMETERS
To rotate the servo motor at 3000r/min in the open collector system (200kpulse/s), set the electronic gear
as follows.
CDV
CMX
N0
f
60
Pt
f : Input pulses frequency [pulse/s]
N
0
: Servo motor speed [r/min]
Pt : Encoder resolution of servo motor [pulse/rev]
200
60
CDV
CMX 3000
262144
CDV
CMX
3000
60
262144
200 60 200000
3000 262144 8192
125
10
3
10
3
The following table indicates the electronic gear setting example (ball screw lead
10mm) when the QD75
is used in this way.
Rated servo motor speed 3000r/min 2000r/min
Servo amplifier
Input system
Open
collector
Differential
line driver
Open
collector
Differential
line driver
Max. input pulse frequency [pulse/s] 200k 1M 200k 1M
Feedback pulse/revolution [pulse/rev] 262144 262144
Electronic gear (CMX/CDV) 8192/125 8192/625 16384/375 16384/1875
QD75
Command pulse frequency [kpulse/s] (Note) 200k 1M 200k 1M
Number of pulses per servo motor revolution as
viewed from QD75[pulse/rev]
4000 20000 6000 30000
Electronic gear
Minimum command unit
1pulse
AP 1 1 1 1
AL 1 1 1 1
AM 1 1 1 1
Minimum command unit
0.1
m
AP 4000 20000 6000 30000
AL 100.0[ m] 100.0[ m] 100.0[ m] 100.0[ m]
AM 10 10 10 10
Note. Command pulse frequency at rated speed
POINT
In addition to the setting method using the electronic gear given here, the
number of pulses per servo motor revolution can also be set directly using
parameter No.PA05. In this case, parameter No.PA05 is the "Number of pulses
per servo motor revolution as viewed from QD75".