Omron R88M-K Series User Manual page 360

5-6 Fully-closed Control
Setting Procedure for Fully-closed Control
1. Set the Control Mode Selection (Pn001) to 6.
2. Set the Encoder Output Direction Switching Selection (Pn012) to 2 or 3. For details on encoder dividing
function, refer to "6-5 Encoder Dividing Function" (P.6-14).
3. Set the Electronic Gear Integer Setting (Pn008) to 0, and set the Electronic Gear Ratio Numerator 1
(Pn009) and Electronic Gear Ratio Denominator (Pn010).
For fully-closed control, the command pulse or external encoder input is used as the reference. If the
gear ratio (Pn009 and Pn010) is set to 1/1, one command pulse or one input pulse from the external
encoder will determine the travel distance.
Example: Using an External Encoder with a Resolution of 0.1 μm
 If the gear ratio (Pn009 and Pn010) is set to 1/1 and a command of 100 pulses is applied to the
Servo Drive, a positioning operation of 10
100 command units × 1/1 (gear ratio) × 0.1 μm = 10 μm
 If the gear ratio (Pn009 and Pn010) is set to 1/2 and a command of 200 pulses is applied to the
Servo Drive, a positioning operation of 10
200 command units
5
4. Set the External Feedback Pulse Dividing Ratio (Pn324 and Pn325) according to information in "
External Feedback Pulse Dividing Ratio Setting (Pn324, Pn325)" (P. 5-33).
5. Set the Internal/External Feedback Pulse Error Counter Overflow Level (Pn328) and Internal/External
Feedback Pulse Error Counter Reset (Pn329) according to information in " External Feedback Pulse
Error Setting (Pn328, Pn329)" (P. 5-34).
5-27
μ
m will be performed for the external encoder.
μ
m will be performed for the external encoder.
× × μ
1/2 (gear ratio) 0.1 m = 10
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
μ
m