YASKAWA Sigma Mini SGMM Series User Manual page 71

APPLICATIONS
2.2.5 Electronic Gear cont.
2
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6) Set the electronic gear ratio in the parameters below.
Reduce the electronic gear ratio
integer smaller than 65535, then set A and B in the following parameters.
 
Cn-24 RATB Electronic gear ratio (numerator)
B
A
Cn-25 RATA Electronic gear ratio (denominator)
RATB
Cn-24 Electronic Gear Ratio
Numerator
RATA
Cn-25 Electronic Gear Ratio
Denominator
These parameters are for position control only.
Set the electronic gear ratio according to machine
specifications.
 
= Cn-24
B
Electronic gear ratio
A
B = [(Number of encoder pulses) x 4] x [Motor shaft rotating speed]
A = [Reference unit (load travel distance per revolution of load shaft)] x [Load shaft ro-
tating speed]
The parameter settings must meet the following condition:
 
B
0.01 100
≦ ≦
A
The electronic gear settings are now complete.
— 2-26 —
 
B
to their lowest terms so that both A and B are an
A
Unit: Setting Factory
None Range: 1 Setting: 4
to 65535
Unit: Setting Factory
None Range: 1 Setting: 1
to 65535
Input
reference
pulse
Cn-25
For Position Control
For Position Control
Servopack
Servomotor
Electronic
gear