Product category:
Robotics, Handling and Storage
News Release from: Street Crane | Subject: Coil handing cranes
Edited by the Engineeringtalk Editorial
Team on 14 March 2003
Coil handing cranes feature remote
control
Leading aluminium foil producer Lawson Mardon Star has installed two advanced coil handing cranes, with a value of GBP 250,000, from Street Crane Company.
Leading aluminium foil producer Lawson Mardon Star has installed two advanced coil handing cranes, with a value of GBP 250,000, from Street Crane Company The cranes are radio controlled and feature a unique homing device for accurate horizontal positioning; this is achieved by using reference data stored in memory to calculate a coil's position precisely from up to 100 predefined locations
This article was originally published on Engineeringtalk on 4 Apr 2006 at 8.00am (UK)
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An unusual design aspect of the two cranes is a low headroom crab that includes a special load rotation device.
Both cranes are double girder semi-Goliath's rated at 16t safe working load.
They are installed in existing bays and span 8.4 and 11.6m.
The limited height envelope of 850mm demanded ultra-compact crabs that comprise a hoist, slewing ring, gearbox and motor.
To meet this need, crabs run within the height of the crane beams rather than on the top of the beams.
Inverter control is used on all crane motions to minimise load swing during acceleration and deceleration.
Normal forward and sideways crane movement is under the control of the operator.
As a coil nears its final location a light on the hand console advises the operator that the coil has reached the critical positioning zone.
From this point on the automatic positioning system, based on a programmable logic controller, will take over to ensure a soft landing with no damage to the foil.
In addition to automatic positioning, the new cranes from Street also have dual barrel TVX hoists.
These ensure a true vertical lift with greater load stability to aid more accurate positioning and further safeguard product from damage.
Similarly, the load rotation device that allows coils to turn through 180 degrees is fitted on the crab rather than on the coil grab.
This again gives greater precision in movement.
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