YASKAWA Σ-V Series User Manual page 97

4 Operation
4.2.4 Electronic Gear
(3) Electronic Gear Ratio
Set the electric gear ratio using Pn20E and Pn210.
Pn20E
Pn210
Use the following equation to calculate the electronic gear ratio.
Electronic gear ratio =
Pn20E (Numerator B) and Pn210 (Denominator A) must be integers.
The set value must be within the range
(4) Procedure for Setting the Electronic Gear Ratio
Electronic gear ratio set value differs depending on the machine specifications. Use the following procedure to
set the electronic gear ratio.
Step
1
2
3
4
5
4-10
Electronic Gear Ratio (Numerator)
Setting Range Setting Unit
1 to 1073741824
30
(2 )
Electronic Gear Ratio (Denominator)
Setting Range Setting Unit
1 to 1073741824
30
(2 )
Travel distance per position reference pulse (reference unit) × Number of divisions
B Pn20E
= =
A
Pn210
0.001
Electronic gear ratio setting range:
≤
0.001 Electronic gear ratio (B/A)
If the electronic gear ratio is outside this range, a parameter setting error (A.040) will be
output.
Check the scale pitch.
Check the scale pitch of linear scale used.
Determine the reference unit used.
Determine the reference unit from the host controller, considering the machine specifications and positioning
accuracy.
Calculate the electronic gear ratio.
Use the electronic gear ratio equation to calculate the ratio.
Set parameters.
Set parameters Pn20E and Pn210 using the calculated values.
Turn OFF the power supply and then ON again to validate the setting.
Factory Setting
– 4
Factory Setting
– 1
Linear scale pitch
B
≤ ≤
4000.
A
≤
4000
Operation
Position
Classification
When Enabled
After restart Setup
Position
Classification
When Enabled
After restart Setup