Chapter 4
Explanation of Functions
4-101
4.3.7 Electronic gear function
The electronic gear function allows you to set a gain on the position
command or position feedback data to adjust the ratio between the
main motor and sub-motor speeds during the synchronous operation
of the motors.
Item
Function code
Data or range of data
Description
Electronic gear set position
selection
P019
00
Position feedback (FB) side
01
Position command (REF) side
Electronic gear ratio numerator
setting (Note 4)
P020
1 to 9999
Electronic gear ratio denominator
setting (Note 4)
P021
1 to 9999
Feed-forward gain setting (Note
2)
P022
0.00 to 655.3
Position loop gain setting (Note 3)
P023
0.00 to 99.99 or 100.0 (rad/s)
Note 1: Block diagrams for the electronic gear function are shown below.
P019 = 00 (FB)
P019 = 01 (REF)
Note 2: You are recommended to set the feed-forward gain setting (P022) to 2.00 first when adjusting the
feed-forward gain. To reduce the position deviation between the main motor and sub-motor, increase the
feed-forward gain. If the motor operation is unstable, reduce the feed-forward gain.
Note 3: You are recommended to set the position loop gain (P023) to 2.00 first when adjusting the loop gain. To
increase the positioning accuracy and position-holding force, increase the loop gain. If a high loop gain results
in unstable motor operation, reduce the loop gain.
Note 4: The electronic gear ratio (N/D) must be within the following range:
1/50 ≤ N/D ≤ 20
N: Electronic gear ratio numerator (P020)
D: Electronic gear ratio denominator (P021)
Position-control feedback
D
N
P023
P022
Feed-forward gain
Position loop gain
Position
command
Speed
command
Electronic gear
1
1+ST
First order lag filter
P023
P022
N
D
Position
command
Speed
command
Feed-forward gain
Position loop gain
Position-control feedback
Electronic
gear
1
1+ST
First order lag filter
P019: Electronic gear set position selection
P020: Electronic gear ratio numerator setting
P021: Electronic gear ratio denominator setting
P022: Feed-forward gain setting
P023: Position loop gain setting
Related code
Summary of Contents for SJ700D-004L
Page 16: ...Contents Appendix Appendix A 1 Index Index Index 1 ...
Page 44: ...Chapter 2 Installation and Wiring 2 23 Memo ...
Page 70: ...Chapter 3 Operation 3 25 Memo ...
Page 248: ...Chapter 5 Error Codes 5 11 Memo ...
Page 256: ...Chapter6 Maintenance and Inspection 6 7 Memo ...