Selected technical work
Case Studies
Anonymised diagnostic approaches showing how condition evidence is developed into a technically defensible assessment and maintenance recommendation.
Evidence and confidentiality boundary
These studies focus on diagnostic method and engineering reasoning. Employer, client, site, asset-tag and production information is excluded. Where a full field example cannot be published, the page presents the verified analytical approach rather than inventing an outcome.
Fault differentiation
High 1X is not always unbalance
Diagnostic question
Is the dominant running-speed component caused by mass unbalance, or is it a response to misalignment, looseness, resonance, eccentricity, soft foot or another forcing mechanism?
Evidence required
- Amplitude by direction and location
- Phase relationship and stability
- Operating-speed and load response
- Machine construction and maintenance history
- Supporting spectrum, waveform and inspection evidence
Decision principle
Balancing is justified only when the wider evidence supports unbalance and an alternative fault is not the more credible explanation.
Structural response
Motion Amplification as supporting evidence
Motion Amplification makes small movement visible, but the video is not a diagnosis by itself. The observed motion must be correlated with vibration, phase, speed, load, construction details and inspection findings.
Observe
Identify the movement pattern at the base, structure, casing, piping, supports and connected components.
Correlate
Compare the visible response with measurement direction, dominant frequencies, phase and operating condition.
Verify
Confirm the suspected mechanical path through inspection, controlled testing or follow-up measurement before corrective work.
Rotor-behaviour assessment
Post-maintenance test-run verification
Test-run assessment combines online and offline vibration information to verify machine response after maintenance. Depending on the machine and available instrumentation, the review may include trend, spectrum, time waveform, phase, orbit, shaft centreline and Bode plots.
The purpose is to identify abnormal response during run-up, steady operation and coast-down, compare against the correct machine context and define any required follow-up.
Assessment sequence
- Confirm sensor and channel integrity
- Review operating and process context
- Evaluate transient and steady-state behaviour
- Compare multiple plots and measurement locations
- Document condition, risk and next action
Publication approach
Additional case studies will be published only after technical review, anonymisation and confidentiality checks. Public studies explain the method; controlled examples may be placed in the Professional Library when redistribution and access conditions require it.