YASKAWA MECHATROLINK Sigma 2 Series User Manual page 137

6 Parameter Setting and Functions
6.3.2 Electronic Gear Function
IMPORTANT
5. Electronic gear ratio is given as
If the decelerator ratio of the motor and the load shaft is given as
where m is the rotation of the motor and n is the rotation of the load shaft,
B
Electronic gear ratio
A
Make sure the electronic gear ratio satisfies the following condition:
0.01 ≤ Electronic gear ratio B
The SERVOPACK will not work properly if the electronic gear ratio is outside this range. In this case,
modify the load configuration or reference unit.
6. Set the parameters.
Set the electronic gear ratio according to machine specifications.
SGDH SERVOPACK with NS115
Reference
Electronic
gear
input
B
A
Electronic gear ratio B
• B = [(Number of encoder pulses) × 4] × [motor speed]
• A = [Reference units (travel distance per load shaft revolution)] × [load shaft revolu-
tion speed]
Reduce the electronic gear ratio
smaller than 65535, then set A and B in the respective parameters.
Pn202
B
A
Pn203
That is all that is required to set the electronic gear ratio.
Pn202 Electronic Gear Ratio
(Numerator)
Pn203 Electronic Gear Ratio
(Denominator)
B
 
--- -
.
 
A
No. of encoder pulses × 4
=
Travel distance per load shaft revolution (reference unit)
≤
100
A
SGM H servomotor
M
= Pn202
A Pn203
B
 
--- -
to the lower terms so that both A and B are integers
 
A
Electronic Gear
Ratio (Numerator)
Electronic Gear
Ratio (Denominator)
Unit: Setting
Range:
None
1 to 65535
Unit: Setting
Range:
None
1 to 65535
6-20
n
--- -
m
× m n
Factory Position Control
Setting:
4
Factory Position Control
Setting:
1