At times, shaft alignment can become extremely frustrating almost as if it is possessed with a mind of its own. One set of readings may indicate that you make adjustments one way, the next set of readings then indicates something completely different. Quite simply, and almost without fail, if there are repeatability issues then something is loose with the laser alignment tool or there is some mechanical play. ASSESSING DETECTOR MOVEMENT Here are some simple questions to work through to try and diagnose and address issues with looseness: Are the chain brackets tight to the shaft or hub?Are the detectors tight to the rods?Are the extension rods tight to the brackets?Is the sensor rubbing on something when positioning the shaft?When using magnetic brackets, do the magnets have full contact to prevent them from slipping?Did…
Misalignment: High amplitude peaks will appear at 1×, 2×, and sometimes 3× the running speed. Look for a 180° (± 30°) phase change across the coupling in the axial direction (for angular misalignment) or radial direction (for parallel (offset) misalignment). Bearing misalignment (cocked bearing) will cause a twisting motion in the axial direction. Look for a 180° (± 30°) phase change from the top to the bottom of the bearing housing or from one side to the other. Imbalance: A high amplitude peak will appear at 1× the running speed. Confirm that the phase difference from horizontal to vertical on the bearing is close to 90° (± 40°). The phase difference between left and right horizontal locations should be within 30° of the phase difference between left and right vertical…
Sensoteq Kappa X is an evolution of wireless continuous health monitoring for a wide range of machinery. Built-in partnership with vibration experts, Kappa X introduces a market-leading 10kHz FMax enabling earlier warning and increased diagnostics capability. Designed to monitor almost any application, the Kappa X wireless vibration sensor features a small footprint, waterproof housing, and a user-replaceable battery. With up to 10kHz Fmax and 6400 Lines of Resolution (LOR), the Kappa X wireless vibration sensor enables a truly comprehensive view of the available vibration spectrum. The Kappa X wireless temperature and vibration sensor detects: Bearing failureUnbalanceShaft and bearing wearMechanical loosenessMisalignmentElectrical noise and resonance