Automatic control system for charging steel coil

SHOU Jun-bo
（Hangzhou Bao-Mit Steel Distribution Co.， Ltd.， Hangzhou 310019， China）

Abstract： Aiming at the time-consuming and the security during the alignment process of the charging steel coil when the feeding cart's position was measured manually，a set of automatic control system for this charging system was developed based on the Siemens S5 series PLC to replace the old manual system. After analyzing the feeding cart's track on the vertical coordinate and the horizontal coordinate，a control system framework was proposed. A position transducer and an encoder were used to measure the cart's position and a negative feedback algorithm was used to move the the charging steel coil and the alignment pole to the correct position automatically. The stability，safety and the efficiency were tested on the actual production process. The results indicate that the automatic control system can substitute for the manual one well，and avoid workers working within the danger zone. The automatic control system improves the production efficiency and eliminate potential hazard of the equipment.
Key words： steel coil feeding； PLC； automatic control system