3-22
PRM
No.
Parameter name
Factory
setting
Unit
Setting
range
Explanation
Cn-24
Electronic gear ratio G1
(numerator)
4
---
1 to 65,535
Setting range
1/100
≤
G1/G2
≤
100
Cn-25
Electronic gear ratio G2
(denominator)
1
---
1 to 65,535
/ 00
G /G
00
Note The factory settings will produce turn the motor once for every 2,048 input pulses.
H
Example
If G1 is set to 8,192 and G2 is set to 1,000, the motor will turn once for every 1,000 input pulses (output as
8,192 pulses). The motor speed will also be 8,192/1,000 times faster.
1,000 pulses
8,192 pulses
Driver
Electronic gear
G1/G2
= 8,192/1,000
Motor
One revolution
(8,192 pulses)
3-5-5 Encoder Dividing Function
H
Function
•
With this function, any number of pulses can be set for encoder signals output from the Servo Driver.
•
The number of pulses per Servomotor revolution can be set within a range of 16 to 2,048.
•
Use this function for the following applications:
When connecting to a positioner with a low response frequency.
When it is desirable to set a pulse rate that is easily understandable.
(For example, in a mechanical system in which a single Servomotor revolution corresponds to a
movement of 10 mm, if the resolution is 5
µ
m/pulse, set the encoder dividing rate to 2,000 (pulses/
revolution).
•
Set the parameters as shown in the following table.
PRM
No.
Parameter name
Factory
setting
Setting range
Explanation
Cn-0A
Encoder divider rate
1,000
pulses/
revolu-
tion
16 to 2,048
pulses/revolu-
tion
Setting for number of output
pulses from Servo Driver.
Note The power must be toggled to enable this parameter (be sure that the indicators go out complete-
ly).
Operation
Chapter 3
