YASKAWA SGM-A3 User Manual page 97

APPLICATIONS OF Σ-SERIES PRODUCTS
3.2.5 Using Electronic Gear cont.
3
84
f) Set the electronic gear ratio in the user constants below.
Reduce the electronic gear ratio
integer smaller than 65535, then set A and B in the following user constants.
 
Cn-24 RATB Electronic gear ratio (numerator)
B
A
Cn-25 RATA Electronic gear ratio (denominator)
This is all that is required to set the electronic gear.
RATB
Electronic Gear Ratio
Cn-24
(Numerator)
RATA
Electronic Gear Ratio
Cn-25
(Denominator)
These user constants are for position control only.
Set the electronic gear ratio according to machine
specifications.

B
Electronic gear ratio
A
B = [(Number of encoder pulses) x 4] x [Motor shaft rotating speed]
A = [Load travel distance per revolution of load shaft (Reference unit)] x [Load shaft
rotating speed]
Note that the user constant settings must meet the following condition:
 
B
0.01 ≤ ≤ 100
A
 
B
to their lowest terms so that both A and B are an
A
Unit: Setting
None Range: 1
to 65535
Unit: Setting
None Range: 1
to 65535
Input
reference
pulse

= Cn-24
Cn-25
Factory For Position
Setting: 4 Control Only
Factory For Position
Setting: 1 Control Only
Servopack
Servomotor
Electro-
nic gear