Youngil Precision Keyence VR-6000 DVIA-T67 DEMO Inspection Report
Contents
Customer
Youngil Precision
Author
Engineer: Chaewon Lee
Installation Date
February 27, 2026
Report Written Date
March 3, 2026
Overview
Tuning and vibration measurement were performed because intermittent problems occurred while using the DVIA-T67 DEMO unit installed in the 5F OQA room at Youngil Precision Ansan site.
Tuning and vibration measurement were performed with the equipment Turned on/IDLE.
Data are presented as VC curves, and Reference materials are provided for the vibration levels.
Vibration Isolation Platform
Model: DVIA-T67
Serial number: N/A
Engineer
Chaewon Lee from DAEIL SYSTEMS, field engineer
Tuning Date
February 27, 2026
Installation Site
Youngil Precision Ansan site 5F OQA room
End User
Youngil Precision
Customer Equipment
Manufacturer: Keyence
Equipment: 3D Profile Measurement System
Model: VR-6000
Equipment Specification
N/A
Equipment Status
Equipment installed and Turned on/IDLE
Measuring Equipment
10.1) Data Physics DAQ
Hardware: QUATTRO, Serial Number: 22436
Software: SignalCalc ACE
10.2) Accelerometer
PCB Accelerometer
Model: 393B05
Vibration Measurement Setup
F Span: 200 Hz
Lines: 3200
Engineering Units: m/s
Window: Hanning
Averaging: FFT Spectrum Averaging
Averaging mode: Exponential, 40
Conclusion
Vertical: Residential Area → vibration is attenuated to VC-F.
Left to Right: Operating Theatre → vibration is attenuated to VC-E.
Front to Back: VC-A → vibration is attenuated to VC-G.
Excellent isolation performance was observed in all directions across the full band.
However, intermittent equipment faults are judged to stem from strong vibration momentarily entering from outside.
The equipment is installed on the 5th floor, a structurally high floor-vibration environment. Measurements confirmed vibration above ISO Operating Theatre in the Vertical and Left to Right directions.
The isolator effectively attenuates floor vibration at those ISO levels to VC-E–VC-F. However, if strong vibration perceptible to people (Workshop class) enters momentarily, post-attenuation levels may reach VC-D.
According to site personnel, very large vibration occurs occasionally when external press equipment operates, likely injecting Workshop-class floor vibration at those moments.
Therefore the cause is not isolator performance but structural factors causing intermittently very high floor vibration. Under normal conditions isolation is sufficient, but momentary strong vibration may affect equipment drive stability.
Measurement Data
| Place of Measurement | Status | Direction | Floor | DVIA-T67 |
|---|---|---|---|---|
| Youngil Precision Ansan site 5F OQA room 1. Floor vibration 2. DVIA-T67 | Turned on/IDLE | Vertical | Residential Area @ 12.5 Hz | VC-F @ 12.5 Hz |
| Left to Right | Operating Theatre @ 12.5 Hz | VC-E @ 12.5 Hz | ||
| Front to Back | VC-A @ 25 Hz | VC-G @ 25 Hz |
Data and Image
Vertical VC Curves
Vertical Autospectrum
Vertical Transmissibility
Left to Right VC Curves
Left to Right Autospectrum
Left to Right Transmissibility
Front to Back VC Curves
Front to Back Autospectrum
Front to Back Transmissibility
Reference
Notes:
1. VC-A/B is measured in 1/3 octave bands from 8-80 Hz, VC-C through VC-G from 1-80 Hz.
2. Detail size refers to line widths in microelectronics manufacturing or particle sizes in medical research.
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