Crab travel limit switch : stops trolley before it approaches the buffer . in other direction , the crane can be moved 小車十字限位裝置可以使小車在行駛到緩沖器末端停止運行,反方向可以運行。
Crane travel limit switch : switches crane to stop travelas it approaches end oftrack . in the other direction , the crane can be moved 大車十字限位裝置可以使大車在行駛到軌道末端停止運行,反方向可以運行。