Patent ID: 6763916
Filing Date: 2004-07-20
Classification: B66F,F15B

Abstract:
A controller for a vehicle lift, said vehicle lift having a first pair formed of a first vertically moveable superstructure and a second vertically moveable superstructure, each of said first and second vertically moveable superstructures having respective vertical positions which vary when said first and second vertically moveable superstructures are respectively moved, said controller comprising:a. an interface configured to receive a first position signal indicative of the vertical position of said first vertically moveable superstructure and a second position signal indicative of the vertical position of said second vertically moveable superstructure; b. a position synchronization circuit responsive to said first and second position signals and operably configured to synchronize vertical actuation of said first and second vertically moveable superstructures by determining a proportional-integral error signal relative to the respective vertical positions of said first and second vertically moveable superstructures.