Electronic Gear Ratio - Delta ASD-B2-0121-B User Manual

Chapter 6 Control Modes of Operation
The electronic gear ratio setting range must be within: 1/50<N/M<25600.
Please note:
In PT mode, the setting value of P1-45 can't be changed when the servo drive is
enabled (Servo On).
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.
When the electronic
gear ratio is not
used
When the electronic
gear ratio is used
6-6

Electronic Gear Ratio

1
=
1
1000 0
=
300 0
Corresponding travel distance per
pulse
3x 100 0 300 0
m
= =
4x 250 0 100 00
= 1 m
Revision June 2010