Servo position and speed mode control device speed comparison - Database & Sql Blog Articles

Photocoupler

Now, the same mechanical conditions are used to compare the position and speed control modes and the stability of the servo motor running speed.
The mechanical transmission mode is the synchronous belt mode;
The servo motor is a R88M-G servo motor;
The driver is a R88D-GT type driver;
The host computer controller is CP1H-XA type plc.
First, the position control mode
1. Control wiring method during position control

2. Required parameter setting: Pn02 (control mode selection) is set to 0.
In the position control, the operating frequency of the servo motor is mainly set by the SPED command in the host computer PLC.
3. When the position is controlled, use the CX-Drive software to monitor the speed curve of the servo motor. As shown below:

Second, the speed control mode
1. Control wiring method during speed control

2. Required parameter setting: Pn02 (control mode selection) is set to 1.
The external 0-10V DC signal is input to the A/D of the PLC by the potentiometer, and then the servo motor operation is controlled by the D/A output of the PLC.
3. When speed control, use CX-Drive software to monitor the speed curve of the servo motor. As shown below:

3. Summary According to the comparison in the above speed graph, the speed control in the position control mode is more stable than the speed control in the speed mode. After a long period of production operation, the speed of position mode control has been stable and meets the requirements of users.