June 2011 • RELIABLE PLANT
A VIBXPERT vibration data collector was used to collect data on a DDM 750 AC 1M drilling machine at the workshop to check for factory acceptance. The VIBXPERT allows for high-resolution time signal and spectrum measurements to be collected. The VIBXPERT can collect more than 100,000 lines of resolution, which allows for the VIBXPERT to capture any transient events that might occur. The vibration data was collected while there was no load on the machine. The main shaft speed was 216 rpm, and the motor itself was turning 1762 rpm.
After the vibration data was collected, the data was transferred back into the OMNITREND software for analyzing. Vibration analysis on the machine during the Factory Acceptance Test (FAT) detected impacts from the cage (train) in the pinion upper bearing.
See plots and entire case study Condition Monitoring on Drilling Platforms: A Case Study