PMWS2: An animated introduction to fluid-film bearing vibration analysis workshop

Jason Tranter, Founder & CEO, Mobius Institute


Orbit plots, centerline plots, full-spectrum plots, Bode plots and polar plots hold critical information, but how do you interpret them, and where does the data come from? This workshop will answer those questions using the famous Mobius animations and simulators. After explaining the proximity probe and keyphasor measurements (including direct, compensated and filtered data), we will explain each of the plot formats and cover a number of fault conditions: unbalance, preload, looseness, rubs, oil whirl and oil whip. We will also discuss a little about the bearings (spherical, elliptical and tilt-pad) and rotor dynamics (mode shapes, criticals, phase shift). It will be animated and interesting, and a great introduction for Category III and IV training/certification.


Jason Tranter (BE Hons) has been involved with condition monitoring and vibration analysis since 1984. In 1986 Jason formed his Australian company, ARGO, which was heavily involved in vibration monitoring and systems development. In 1990 he sold that company and the “ALERT” product line to DLI Engineering in Seattle (now AzimaDLI). Jason was in charge of product development, and later in charge of vibration products. In 1996 Jason returned to Australia and for the next three years he developed the ExpertALERT (EAV), DCX data collector, and DCX Online products for DLI Engineering. In 1999 Jason formed Mobius and began the development of the iLearnInteractive series of computer-based products for vibration and alignment training and analysis, including iLearnVibration, iLearnAlignment and Interpreter. These products have been used by thousands of people in over 90 countries to learn and become certified. Mobius was awarded the Victorian Regional Exporter of the year and was a finalist in the Australian Export Awards for 2007 and 2008. In 2005 Jason formed the “Mobius Institute” for expanded distance learning and public courses, and courses that comply with ISO and ASNT standards for certification. Mobius has offices in Australia, the United States and Costa Rica, and training centers in over 40 countries. In 2010 Jason formed the Mobius Institute Board of Certification, a not-for-profit organization to make it possible for vibration analysts anywhere in the world to achieve certification per ISO 18436-1. Jason has delivered technical papers around the world, and has had articles published in numerous international magazines and journals.