What are the control methods of the electric cylinder?

What are the control methods of the electric cylinder?

1. Speed ​​mode: The rotation speed can be controlled by analog input or pulse frequency. The speed mode can also be used for positioning under the outer loop PID control of the upper control device, but the position signal of the motor or the direct load must be used. The position signal is fed back to the upper position for operation. The position mode also supports the direct load outer loop to detect the position signal. At this time, the encoder at the motor shaft end only detects the motor speed, and the position signal is provided by the direct final load end detection device. The advantage of this is that it can reduce the intermediate transmission process. The error increases the positioning accuracy of the entire system.

2. Position control: In the position control mode, the rotation speed is generally determined by the frequency of externally input pulses, and the rotation angle is determined by the number of pulses, and some can directly assign speed and displacement through communication. Since the position mode can have very strict control on the speed and position, it is generally used in positioning devices.

Application areas such as CNC machine tools, printing machinery and so on.

3. Torque control: The torque control method of the electric cylinder is to set the external output torque of the motor shaft through the input of external analog quantity or the assignment of direct address. When the analog quantity is set to 5V, the motor shaft output is 1.59Nm: if the motor shaft load is lower than 1.59Nm, the motor rotates forward, when the external load is equal to 1.59Nm, the motor does not rotate, and when it is greater than 1.59Nm, the motor rotates reversely. The set torque can be changed by changing the setting of the analog quantity in real time, or the value of the corresponding address can be changed through communication. It is mainly used in winding and unwinding devices that have strict requirements on the force of the material. At the same time, an external force sensor can be added for further detection.

The electric cylinder in torque mode can output a high load, completely replacing the cylinder and partially replacing the oil cylinder. And there are great improvements in life, maintenance, efficient cleaning and so on.

4. Closed-loop control: It is a closed-loop negative feedback PID adjustment system, which is carried out inside the driver. The device detects the output current of the driver to each phase of the motor, and the negative feedback is used to set the current for PID adjustment, so that the output current is as close as possible to the setting. current. This article is from the official website of the manufacturer WORLD Press Machine www.pressmachine-world.com, please indicate the source for reprinting!