Electronic Gear Ratio; Electronic Gear Ratio (1St Numerator) (N1); Electronic Gear Ratio (Denominator) - Delta Electronics AC Servo Drive ASDA-AB User Manual

Chapter 6 Control Modes of Operation|ASDA-AB Series
2) So if user change the control mode to Pr mode and switching power off and on, the servo
drive of parameter P1-36 will auto set the value to 20.

6.2.5 Electronic Gear Ratio

Relevant parameters:
P1 - 44▲
GR1

Electronic Gear Ratio (1st Numerator) (N1)

Default: 1
Applicable Control Mode: P
Unit: Pulse
Range: 1 ~ 32767
Settings:
Multiple-step electronic gear numerator setting. Please refer to P2-60~P2-62.
P1 - 45▲
GR2

Electronic Gear Ratio (Denominator)

Default: 1
Applicable Control Mode: P
Unit: Pulse
Range: 1 ~ 32767
Settings:
Electronic gear denominator setting.
It is recommended to set electronic gear ratio when the servo drive is Off. As the wrong setting
can cause motor to run chaotically (out of control) and it may lead to personnel injury, therefore,
ensure to observe the following rule when setting P1-44, P1-45.
The electronic gear ratio setting (Please also see P1-44, P2-60~P2-62):
Pulse input
f1
The electronic gear ratio setting range must be within: 1/50<N/M<200.
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.
6-8
Position f1: Pulse input
N
command
N: Numerator 1, 2, 3, 4, the setting value of P1-44 or
M
N
f2 = f1 x
M
M: Denominator, the setting value of P1-45
Communication Addr.: 012CH
Related Section:
Section 6.2.5
Communication Addr.: 012DH
Related Section:
Section 6.3.6
f2: Position command
P2-60 ~ P2-63
Revision January 2009