Control forms and various control methods of bridge cranes
During the operation of the bridge crane, its control system has played a vital role. In addition to the two common control forms of cam controller control and master controller control, the bridge crane has also successfully realized automatic control. , Thereby improving the performance of each action.
The automatic control system of the bridge crane includes programmable controller automatic control, automatic positioning device control, correction and electrical synchronization of the cart operating mechanism, electromagnet and its control circuit, and ground control.
The operation of each mechanism of the bridge crane depends on the program control device; and its automatic positioning is generally based on the use environment and accuracy requirements of the controlled object to determine the mechanism form of the device. The automatic positioning device usually uses various detection elements and Relays, contactors or programmable controllers cooperate with each other to achieve the purpose of automatic positioning.
The correction and electrical synchronization of the cart operating mechanism in the bridge crane are divided into manual correction and automatic correction. When the correction exceeds a certain value, the correction signal generator sends a signal, and the driver turns off the motor on the leading outrigger side and turns on Adjust the lagging motor with the deviated leg. The automatic correction means that when the deflection exceeds a certain value, the correction command generator issues an instruction, and the system performs automatic correction. Electrical synchronization is in the AC drive, an electric shaft system with a balanced motor is often used to achieve electrical synchronization.
Some cranes will use ground control. The key component is a manual button switch. The wired remote control uses a dedicated cable or power line as the carrier body, and uses a modem to transmit the signal to achieve a control method with only a few channels. Wireless remote control uses contemporary electronic technology to transmit information in the form of electric waves or light waves to achieve the purpose of control.
