Product category:
Plantwide control
News Release from: System Devices | Subject: Opto 22 controls
Edited by the Engineeringtalk Editorial
Team on 20 October 2000
Giant robot manipulator I/O handled by
Opto 22
Opto 22 controls supplied by System Devices are at the heart of a successful project to install a giant press and integrated robot manipulator at Sheffield Forgemasters Engineering.
Opto 22 controls supplied by System Devices are at the heart of a successful project to install a giant press and integrated robot manipulator at Sheffield Forgemasters Engineering The new press exerts a load of 10 000 tonnes and is the only one of its kind in Europe
This article was originally published on Engineeringtalk on 29 Aug 2000 at 8.00am (UK)
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It is used to manufacture heavy forgings of up to 300 tonnes for use in applications such as turbine rotors, bridge supports and propeller shafts for ships.
The robot manipulator is used to pass ingots to the press for forging.
At 15 metres high, 10 metres wide and 20 metres long, it is the size of a typical house.
Using eight wheels, the manipulator travels up and down a 20-metre long set of rails carrying its ingots to the press.
The state-of-the-art computer system has been installed by Dronfield-based Forgex to provide size control on forged items to +/- 1mm and to control the integrated manipulator.
Opto 22 equipment handles the 700 points of I/O which are associated with the press, the manipulator and integration of the two.
The control, comprising a remote analogue and digital I/O station from the main PC, is fed over a high speed 115 kbaud serial link, each input and output being optically isolated.
Real-time control software running on a ruggedised PC system handles the 60 motors involved with the press and the manipulator, together with a hydraulic servo power pack and a set of proportional valves which control water pressure in the press to ensure that it can reach its peak pressure of 7000 psi.
The PC uses a Bus card for digital I/O while the manipulator uses remote Mistic I/O to give a mix of digital, analogue and quadrature signals, to feed back the direction of motion of the manipulator.
Six PLCs with isolated I/O modules are used to control motor starting and interlocking.
All computer I/O is optically isolated, interfacing plant inputs at 24 V dc and solenoid outputs at 110V dc.
"The biggest advantage on this project has been the use of the Mistic remote I/O system," said Forgex MD Dr Mike Dickinson.
"Although the manipulator is a mobile vehicle with a run of 20 metres, it only needed four wires because the remote I/O eliminates the need for bringing large bundles of wiring back to a central controller.
This massively reduced the amount of plant wiring needed and the time to carry it out," he added.
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