Yaskawa SGDH Linear Sigma Series - Manual (Page 294)

9 Operation
9.8.2 Setting the Electronic Gear
9-50
(3) Related Parameters
(4) Procedure for Setting the Electronic Gear Ratio
Use the following procedure to set the electronic gear ratio.
Pn202 Electronic Gear Ratio (Numerator)
Setting Range Setting Unit Factory Setting Setting Validation
1 to 65535 − 4 After restart
Pn203 Electronic Gear Ratio (Denominator)
Setting Range Setting Unit Factory Setting Setting Validation
1 to 65535 − 1 After restart
The electronic gear ratio to be set can be calculated by the following equation:
* If the ratio is outside the setting range, reduce the fraction (both numerator and denominator) until you obtain integers
within the range. Be careful not to change the electronic gear ratio (B/A).
„ IMPORTANT
Electronic gear ratio setting range: 0.01 ≤ Electronic gear ratio (B/A) ≤ 100
If the electronic gear ratio is outside this range, the SERVOPACK will not operate properly. In this case, modify the load
configuration or reference unit.
Position
Position
Electronic gear ratio: =
A
B
Pn203
Pn202
=
Workpiece travel distance per reference u
Scale pitch
Step Operation Description
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 (B/A).
4 Set parameters. Set parameters using the calculated values.