ASDA-A User Manual
Chapter 6 Control Modes of Operation
© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
4th Edition 2005/11/30, HE03
6-9
6-2-5 Electronic Gear Ratio
Relevant parameters:
P1 - 44
ϧ
GR1
Electronic Gear Ratio (1st Numerator) (N1)
Communication Addr.: 012CH
Default: 1
Applicable Control Mode: P
Range: 1~32767
Unit: Pulse
P1 - 45
ϧ
GR2
Electronic Gear Ratio (Denominator)
Communication Addr.: 012DH
Default: 1
Applicable Control Mode: P
Range: 1~32767
Unit: Pulse
Electronic gear ratio=( )=
N
M
1
P1-44
P1-45
, the electronic gear setting range should be 1
50
< ( )< 200
N
M
1
The electronic gear function provides easy travel distance ratio change. It can enable the servo motor travel
distance per input reference pulse to be set to any value. It also allows the pulses that may be generated by
the external controller to be used for control without considering the machine gear ratio or the numbers of
encoder pulse. For example, if the electronic gear ratio is 0.5 and the encoder pulse per cycle is 10000ppr,
the motor rotation pulse is 1 pulse (revolution).
For example, after the proper electronic gear ratio is set, the reference travel distance is 1
P
m/pulse, it
becomes easier to be used.
Travel distance per load shaft revolution = T
Motor (encoder signal output: A/B, Z)
Encoder PPR: 2500 pulse
Ball Screw Pitch: 3mm
=
1
1
=
3x1000
4x2500
=
10000
3000
=
3000
10000
m
=1 m
Workpiece (Table or Load)
When electronic gear
function is Not Used
When electronic gear
function is Used
Travel distance per load shaft revolution
