End-of-Line Quality Testing

At end-of-line, you need a decision — pass or fail — on every unit, in under 30 seconds. Subjective assessment by an operator is not repeatable. Manual spectrum review is too slow. TVIB NDT RAM gives you automated spectral alarm on a fixed test fixture.

Set up the alarm envelope. Measure 20–30 known-good units. Let TVIB compute the spectral envelope from those measurements. Set upper alarm thresholds with your agreed margin — typically 3–6 dB above the good-unit mean in each frequency band of interest. Save the template.

Run production. Each unit mounts on the test fixture. Operator starts the measurement sequence. PhonoVibe captures the vibration signature. TVIB compares it against the alarm envelope band by band. Pass if all bands are within threshold. Fail if any band exceeds it. Result in seconds.

Automotive shaft example. A driveshaft with an inner joint defect produces elevated amplitude at the joint defect frequency (typically 6× to 8× rotation frequency depending on ball count). The NDT RAM alarm band covers that region. A defective shaft trips the alarm before it reaches the customer.

Motor and pump example. An unbalanced rotor produces elevated 1× amplitude. A bearing defect in the motor produces BPFI, BPFO, and BSF sidebands. Both are catchable with correctly placed alarm bands.

The PhonoVibe’s 24-bit resolution and factory calibration certificate ensure the measurement is consistent across shifts and across test stands. When a unit fails, the full waveform and spectrum are saved — evidence for the rework team.

Products in this workflow

• PhonoVibe Series DAQ
• TVIB Analysis Software
• Sensors & Accessories