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