Chapter 6 Control Modes of Operation|ASDA-A&A+ Series
6-10 Revision April 2009
The electronic gear function provides easy travel distance ratio change. However, the over high
electronic gear ratio will command the motor to move not smoothly. At this time, the users can use low-
pass filter parameter to improve this kind of situation. For example, assume that the electronic gear ratio
is equal to 1 and the encoder pulse per revolution is 10000ppr, if the electronic gear ratio is changed to
0.5, then the motor will rotate one pulse when the command from external controller is two pulses.
For example, after the proper electronic gear ratio is set, the reference travel distance is 1 μm/pulse, the
machinery will become easier to be used.
Electronic Gear Ratio Corresponding travel distance per pulse
When the electronic
gear ratio is not used
=
1
1
=
3x1000
4x2500
=
3000
10000
m
When the electronic
gear ratio is not used
=
10000
3000
=1 m
6.2.6 Low-pass Filter
Relevant parameters:
P1 - 08
PFLT
Smooth Constant of Position Command (Low-
pass Filter)
Communication Addr.: 0108H
Default: 0 Related Section:
Applicable Control Mode: Pt Section 6.2.6
Unit: 10ms
Range: 0 ~ 1000 (0: Disabled)
PFL
Target position
Position
Time (ms)
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