What does a crane's safety ruler mean
he safety of the crane scale, is mainly used in car, on the main girder generally have a limit switch, when the car running to limit position, safety rule will encounter limit switch, this will cause the whole car power, so as to achieve security role!
In addition to the electronic protection of the last limit protection, when the mechanical position changes the mechanism that triggers the crane to stop.
It is the lever that the crane of the collision crane limiter, when the crane runs to the set position, the stop after the limit ruler.
