Drive and Ratio Selection
Working out what the load needs in torque, speed, duty cycle, and starting and peak conditions, then choosing a gearbox, belt, chain or direct drive that delivers it without running at the edge of its rating.
Gears trade speed for torque and turn rotation into motion. Every drive, damper, actuator and linkage on a machine is some version of that trade. When one binds, seizes or runs backwards, the fix starts with understanding the ratio rather than replacing the part that broke.
Working out what the load needs in torque, speed, duty cycle, and starting and peak conditions, then choosing a gearbox, belt, chain or direct drive that delivers it without running at the edge of its rating.
Converting rotation into the movement a machine needs: damper linkages, actuators, slides, cams and travel limits, checked through the full range of travel.
Fan selection and arrangement, system effect, duct and plenum losses, and the gap between the airflow on a submittal and what a unit delivers once it is installed in a real building.
Capacity against rating, approach temperatures, air and water side pressure drop, and verification of delivered performance against the selection.
Measuring what is shaking and why: imbalance, misalignment, looseness, a bearing defect or resonance. The component that failed first is often not the cause.
Why a bearing keeps failing: load, lubrication, fit, shaft currents from a drive, or a mounting that was never square.
Structural and enclosure design for equipment that has to be lifted, shipped, set on a roof and still line up, including the tolerance and fit problems that only appear during assembly.
Purpose-built rigs for validating a component or a whole assembly, with the sensors, data acquisition and procedure designed together so the results are repeatable by somebody else.
Written test procedures, instrumentation plans, and the calculations behind them. Data that holds up in a review with the manufacturer's engineer.
Tracking the source: a fan, a drive frequency, a panel resonating, flow through a damper. Then what can be changed without giving up the performance you bought the equipment for.
A gear train tells you exactly what it will do before you build it, and so does a load calculation. Most mechanical surprises in the field are a number nobody ran. We run it first, write it down, and hand it over with the machine.