Yaskawa Large Capacity Sigma II Series - Manual (Page 107)

4.2 Settings According to Host Controller
4-31
4
Make sure the electronic gear ratio satisfies the following condition:
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.
Reduce the electronic gear ratio to the lower terms so that both A and B are integers
smaller than 65535, then set A and B in the respective parameters.
That is all that is required to set the electronic gear ratio.
Set the electronic gear ratio according to equipment specifications.
Electronic gear ratio
• B = [(Number of encoder pulses) × 4] × [motor speed]
• A = [Reference units (travel distance per load shaft revolution)] × [load shaft revolution
speed]
Pn202 Electronic Gear Ratio
(Numerator) Unit:
None
Setting
Range:
1 to 65535
Factory
Setting:
4
Position Control
Pn203 Electronic Gear Ratio
(Denominator) Unit:
None
Setting
Range:
1 to 65535
Factory
Setting:
1
Position Control
IMPORTANT
0.01
≤ Electronic gear ratio B
A ≤
100
B
A
----
 
 
B
A
Pn202
Pn203
Electronic Gear
Ratio (Numerator)
Electronic Gear
Ratio (Denominator)
M
Reference
input pulse
SGDH SERVOPACK
SGMBH servomotor
Electronic
gear
B
A
B
A
----
 
  Pn202
Pn203
---------------- =