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Illuminating Time Waveform & FFT Setup

Dennis Swanepoel
Dennis Swanepoel | Lead Technician, WearCheck
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CBM CONNECT Presents: Illuminating Time Waveform & FFT Setup by Dennis Swanepoel, WearCheck

Summary 
In most cases the databases that we use are one’s that are setup for previous generation analysers with different capabilities than our modern day analysers. Databases are also inherited from one person to the next, without question accepting that the setup was done optimally. In this webinar we will be showing you how to do a proper setup or evaluate the current setups that you are using to ensure proper evaluation of machine condition by representing the analogue signal effectively in the digital domain.

Learning Takeaways: 
1. Waveform setup fundamentals
2. FFT Setup fundamentals
3. Knowledge to avoid common pitfalls in setups

About the Presenter 
Dennis is the Lead Technician for Wearcheck Reliability Solutions with 18 years of condition monitoring experience. Qualifications include NDip Mechanical Engineering, Vibration ISO CAT IV certification and ODS and Modal Analysis.

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Sagi Rathna Prasad

Hi Dennis,

I appreciate your insightful webinar.

I have a question, for the run-up or run-down conditions will the spectrum/FFT can indicate the fault frequencies of the machinery?

Thank you in advance.

Sagi Rathna Prasad

Dear Dennis,

I have doubt in the example given in the webinar regarding high-frequency acceleration enveloping. In the test setup, Fmax is chosen as 1000Hz and 1000 Hz High pass filter is applied. However, in FFT you have shown frequencies below 1000Hz. I didn’t understand that after employing high pass filter how one can get frequencies below the cut-off frequency. I kindly request you to give your insight on this.

About the Author

Dennis Swanepoel
Dennis Swanepoel Lead Technician, WearCheck

I started my career attaining my National Diploma(S4) in Mechanical Engineering and becoming a Performance and Testing Technician in the Power Generation Industry. I have been in the field of Condition Monitoring for past 16 years. Starting out as an apprentice I managed to improve my knowledge in condition monitoring in various industries and becoming involved in training. In my first years in condition monitoring, I managed to be certified by Technical Associates as a trainer for their courses and started specializing in ODS and Modal Analysis. I have worked in various industries and are qualified in Vibration, Thermography and Oil analysis. I also specialize in operational Deflection shape analysis. Currently, my main duties are shared between starting up new service contracts, Special Investigations, Training (Mobius Training Partner) Industries that I have worked in include Power Generation, Coal Mining, Platinum/chrome refinery and mining, Waste Water Treatment, Food, Paper and Sugar Mills. My most recent achievement was to pass the Mobius CAT IV course and starting up two service contracts in the Power Generation Industry that include vibration, thermography, oil analysis, alignment.