Crane trolley and hoist position homing and velocity synchronization

摘要

A method of transferring a load is disclosed. The method includes the steps of enabling synchronization of first and second hoists and first and second trolleys and choosing a hoist function or a trolley function. The first and second hoists are a first mover and second mover, if the hoist function is selected. The first and second trolleys are the first and second movers, if the trolley function is selected. The method includes the steps of commanding one of the first mover and second mover to be the master and the other to be the slave and actuating a master control associated with the master. The method further includes the step of outputting signals to the first and second actuators such that the master and the slave are moved in a direction indicated by the master control.

主权项

1. A system for synchronization, the system comprising:
a transport device having a first hoist and a second hoist and a first trolley and a second trolley, wherein the first hoist is connected to the first trolley and the second hoist is connected to the second trolley; a first hoist actuator connected to the first hoist and a second hoist actuator connected to the second hoist; a first trolley actuator connected to the first trolley and a second trolley actuator connected to the second trolley; a program logic controller, wherein the program logic controller includes a synchronization module for synchronizing movement of the first and second hoists and the first and second trolleys; and a master control connected to one of the first hoist and the first trolley, wherein the first hoist is a master and the first hoist actuator is a master actuator and the second hoist is a slave and the second hoist actuator is a slave actuator, if operational control of the first and second hoists is selected; wherein the first trolley is the master and the first trolley actuator is the master actuator and the second trolley is the slave and the second trolley actuator is the slave actuator, if operational control of the first and second trolleys is selected; wherein the master control sends a signal to move the master via the master actuator and move the slave via the slave actuator such that the slave moves at substantially the same rate as the master.