Engineering Journal
Field notes on machine monitoring and predictive maintenance.
Long-form, source-cited pieces on the practical realities of Industry 4.0 — what actually works on the plant floor, not what a vendor deck claims.
Predictive Maintenance
8 min read
Jun 2026
The hidden cost of spindle resonances
How minute harmonic vibrations degrade tool life by up to 40% before any audible symptom appears — and what the frequency-domain signature actually looks like.
Industry 4.0
12 min read
Jun 2026
Legacy hardware, modern data: retrofitting 1990s controllers
A field-tested playbook for bringing Fanuc, Siemens, and Heidenhain controllers from the 1990s onto a modern MQTT-based sensor gateway without touching the PLC program.
ROI
5 min read
May 2026
Predictive vs reactive maintenance: the ROI math that convinces a CFO
A simple framework for translating vibration-monitoring investment into the language a CFO signs off on. Includes a worked example from a mid-size machining plant.