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Salford, UK.
1st August 2009
- for immediate release

UNIVIB Ltd. has recently completed the commissioning of one of its AVAS vibration monitoring systems at Gulf Aluminium Rolling Company (GARMCO) located in The Kingdom of Bahrain. The AVAS system supplied comprises an integrated, on-line vibration monitoring system covering a cold rolling mill and the combination roll grinding machine that supplies the mill with both work and back-up rolls.

Systems running appropriate AVAS modules have been installed on both the mill and the grinding machine. The AVAS "Mill Module" and "Grinder Module" provide the operators of these items of plant with early warning of the onset of abnormal vibrations allowing them to take immediate evasive actions to avoid marking the strip or rolls and to choose the optimum speeds to roll coils or grind rolls. The AVAS "Tracking and Trending Module" has also been installed on the mill. This tracks and trends the levels of vibration generated by all of the usual exciters, for example the chock bearings, gearbox, couplings and spindles etc., and will warn if the levels of vibration from any of these increase above tolerable thresholds. This provides a tool primarily for the benefit of the technical staff, assisting them to analyse the vibrations produced by rolling and predict potential problems.

The mill system also incorporates chock temperature monitoring to warn of any lubrication problems that might, if left unchecked, lead to bearing failure. The contract also included the supply of UNIVIB's post-process roll inspection system, "Chatter_Detect", a tool that performs a final check that rolls have been ground free of chatter marks.

All of the individual systems are networked and all coil and roll vibration histories are stored in a common database so that, should any issues occur, the historic data can be further analysed by means of queries to help track down the source.

Hendrik de Villiers, Reliability Engineer at GARMCO, said "The installation of the vibration monitoring systems went well and was completed on schedule. I have every confidence that, using the new system, we will be able to increase the speeds with which we can roll strip in the mill without compromising the high quality of our product."