Maintenance Tips
Pre-Balance Check List
Before you jump right into a balancing job to correct a reported vibration issue, begin your anal...
Know your equipment!
In a previous life, I ran a production facility that catered to a very cyclical market and we always...
Considerations for Online PdM Systems
A primary consideration for an online monitoring system is to determine which machines warrant surve...
Predictive Maintenance - a 12-Step Program
Survey the plant in terms of critical, essential, balance of plant categories. Choose the machine...
There is a cost to everything!
I grew up in a household as the youngest of five kids so my parents knew a little bit about managing...
Tell-tale Signs of Faults in Mechanical Equipment
Misalignment High amplitudes at 1X, 2X, and sometimes 3X Typically 180 degree (+/- 30) across co...
How is Machine Vibration Described?
Summary
In this section we describe machine vibration using methods that are useful for analysis purposes.
We define the terms ‘amplitude' and ‘frequency', and describe the physical significance of these terms. Amplitude is a measure of vibration severity while frequency is a measure of oscillation rate.
Together, the amplitude and frequency of a vibrating machine component provide us with an understanding of the condition of the machine as well as the cause of the vibration.
Machine vibration is much easier to analyze when it is graphically displayed, and we presented the two most common displays: waveforms and spectra. Usually, spectra are more useful for analysis purposes.
Vibration Analysis for Managers
Summary
Nicolae Vidroiu, National Cooling Co. and Emad Bitar, Commtest Instruments Ltd.
A maintenance manager can fill the role of vibration analyst since he has the authority to quickly determine if a machine needs to be shut down for repair. This method works for small to medium-size plants. If the program expands beyond the scope of the manager the duties can he split among area managers.