Dec 10, 1998 · accommodate two blocking; therefore, a control type weighted limit switch is used instead of a power limit switch. Bridge and Trolley Limit Switches: Each traverse motion, bridge and trolley, will utilize end of travel limit switches. Each limit switch, once tripped, will allow motion in the reverse direction only.
Jun 01, 2017 · Free Online Library: Trolley motion control based on s-shaped velocity profile for quay crane cargo oscillation comparison.(Report) by "Science - Future of Lithuania"; Science and technology, general Control engineering Analysis Cranes (Hoisting machinery) Properties Technology application Cranes, derricks, etc. Electric cranes Equipment performance Evaluation Incremental motion control
to move in a 2D plane. Here, X is trolley moving direction Z is vertical direction, θ (t) is the sway angle of the load (rad), x(t) is displacement of the trolley (m), l(t) is hoist cable length in meters, F x is control force applied to the trolley in the X-direction (N), F l is control
Methods and apparatus for eliminating instability in intelligent assist devices are disclosed. The intelligent assist device includes an overhead motorized moveable trolley, a support that extends downwardly from the trolley to a payload, and a sensor operatively coupled to the support to sense a characteristic of motion imparted by a human operator to the device.
Put it at the motion limit position, for +LIM motor rotation direction is CW (clockwise), and for –LIM motor rotate direction is CCW (counter clockwise). When a carrier reaches to the point, motor immediately stops under any conditions.
Jul 09, 2009 · With the use of Flux Vector crane control, it is not necessary to reverse the polarity of the motor. Instead, the motor is retarded by the application of an adjustable amount of retarding torque, determined through the drive’s software, and the position of the master switch in the direction opposite to the crane’s motion.
Integrated vehicle motion control system US20050246087A1 (en) * 2002-08-29: 2005-11-03: Akira Hommi: Device, method, and car for estimating variation of state of road surface US20040158375A1 (en) * 2003-02-07: 2004-08-12: Nissan Motor Co.,Perfect Transfer Cart Motion control apparatus and method for automotive vehicle
1. The first motion is the hoist, which raises and lowers the material. 2. The second is the trolley (cross travel), which allows the hoist to be positioned directly above the material for placement. 3. The third is the gantry or bridge motion (long travel), which allows the entire crane to be moved along the working area.
The motorized trolley MR2 and the manual trolley are designed and manufactured for the purpose to move the lifted load laterally with the combination with the electric hoist. Movement of a load in a 3D direction such as up/down, forward/backward and right/left is also enabled by combining
The Maxspeed crane control system uses adjustable speed drives to control the speed and direction of the crane motors driving the gantry, trolley, boom, cable reels, and hoist. The speeds and directions are set by the operator using a master switch (joystick), which inputs signals to the controller through the I/O racks. A high-
acting telescopic cylinder is used to provide motion in three directions. In this working the turning table allow cylinder to rotate in any direction i.e. also allow to tilt in left and right direction. To deliver the material in right side and left side, we have fixed sides of trolley by hinge joint using pin. The
It integrates a motion control card and operator interface in one package. The user friendly interface allows the user to operate the controller without needing a PC, PLC, host controller or programming. These are the mode of operations: Set Acceleration, Set Velocity, Set Position, Absolute Move, Relative Move, Find Home, Reset Position
input shaper to control both the position and the sway angle. For the tower crane model, the sway angle is composed of a radial direction swing angle and a tangential direction swing
Jun 21, 2021 · Encoders make motion control possible by sensing the motor’s speed and position and sending feedback signals to control components. Two square waves, or channels, shifted 90 electrical degrees from each other, along with an optional index pulse that occurs once per revolution, encode the angular position data.
6) Hoist - The hoist mechanism is a unit consisting of a motor drive, coupling, brakes, gearing, drum, ropes, and load block designed to raise, hold and lower the maximum rated load. Hoist mechanism is mounted to the trolley. 7) Trolley - The unit carrying the hoisting mechanism which travels on the bridge rails in a direction at
