Prevent the heavy object from gliding for being more effective, rise organization of crane add one rotate encoder , PG count mould change combine PLC with close ring system , make clivers more steady , more reliable .

• 为了更加有效的防止重物下滑,在桥式起重机起升机构各加上一套由旋转编码器、PG数模转换和PLC相结合的闭环系统,使主副吊钩拖动更加稳定、可靠。