ABB drives boost Romiley Board Mill's output
An
ABB Automation Tech (Drives and Motors) product story
Edited by the Engineeringtalk editorial team
Apr 29, 2009
Romiley Board Mill, a Manchester-based paper mill, has increased its output by 10 per cent with the help of three ABB machinery drives, installed by system integrator Drives and Automation.
The drives control three electrically driven machine sections and synchronise these with the rest of the machine, which is driven by a line shaft, without the assistance of an external PLC.
Romiley Board is an independent paper mill that manufactures paperboard from recycled fibre.
The board is mainly used in packaging.
The company saw an opportunity to increase output by adding a new dryer section to its existing paper machine.
To avoid costly mechanical modifications to the line shaft, the section needed to be electrically driven.
The configuration of the machine also required independent speed control of the existing calendar and reel-up sections with sectional drives.
Ernie Domville, technical manager of Romiley Board, said: 'The ABB machinery drive was identified by Drives and Automation as the most suitable AC drive for this application.
'All functions for sectional speed control and communications are contained within the drive, which means that a controlling PLC is not required,' he added.
The first drive receives feedback from an encoder on the line shaft and the set point is then cascaded from one drive to the next.
Each drive controls a 37kW ABB process-performance, high-efficiency AC motor.
In a conventional setup, a PLC would feed out to all sections, each one driven by a DC drive.
However, with the control capabilities of the ABB machinery drive, no central control function is needed.
In addition, robust and maintenance-free AC motors could be used.
Nigel Vivian, one of the directors of Drives and Automation, said: 'All programming can be done inside the drive, so no PLC is needed.
'This simplifies the system and reduces cost.
'No separate software is required.
'The operator controls the sections from an interface linked to each drive,' he added.
Drives and Automation is an approved ABB systems integrator and was responsible for programming, installing and commissioning the drives as well as supplying the motors and panels.
Vivian said: 'The functionality of the ABB machinery drive can easily be modified or extended using standard, built-in function blocks.
'The programme resides in a separate memory unit.
'This enables easy maintenance and repair - just changing over the memory unit transfers the programme to a new drive,' he added.
The dryer comprises eight steam-heated cast-iron cylinders supplied by Parsons Reiss.
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