Noise usually starts in the control loop
The acoustic story is shaped by commutation strategy, current ripple, and mechanical resonance together. Moving only one variable seldom fixes the symptom.
For regulated device programs, we log the acoustic state in the same worksheet as thermal rise and speed regulation so validation teams can compare revisions directly.
- Tune low-speed commutation before chasing enclosure damping.
- Log idle-state noise and loaded-state noise separately.
- Keep the PSU ripple review inside the same validation pack.
Acoustic validation pack
The review pack used before pilot release.
| Mode | Measure | Watch-out |
|---|---|---|
| Dwell | A-weighted noise | Unexpected whine during hold current. |
| Creep | Velocity ripple | Visible surging in imaging or dosing paths. |
| Start/stop | Recovery time | Unstable loop after repeated short strokes. |
Drive-side logging example
{
"mode": "low-speed-creep",
"busVoltage": 48,
"phaseCurrentA": 1.9,
"noiseDbA": 37.4,
"velocityRipplePct": 1.8
}Continue Reading
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