The invention discloses a semi-automatic control method of a gantry crane; based on a PLC and a rectifier module, an inverting device and a control unit exchange data in real time; firstly, the PLC gives a starting command to the control unit; the control unit starts the rectifier module; the crane is initialized for setting; and a crane grab is recovered to an initial position; then, the crane grab is automatically opened; the PLC gives a rotating amplitude change command to control the grab to operate to a set taking coordinate position; after the grab operates in place, the PLC gives a descending command to control the grab to descend to a taking position; and the grab automatically digs deeply and is closed; then, the PLC gives a rising command to control the grab to rise to a preset unloading height, and gives the rotating amplitude change command to control the grab to operate to a set unloading coordinate position; and finally, after the grab operates to the set unloading coordinate position, the grab is opened for unloading to finish once taking and unloading process. The method has the advantages of improving the production efficiency and reducing the labor intensity of workers.
Semi-automatic control method of gantry crane
2016-01-20
Patent
Electronic Resource
English
IPC: | B66C Krane , CRANES |