FFT Applications
Q-1-6 Quality control of a stepping motor (statistical processing of vibration level and frequency spectrum)
- This application makes Pass/Fail
judgment of a stepping motor using vibration level and frequency analysis spectrum.
The NP-3414 accelerometer with built-in preamplifier detects a signal and outputs it to the VC-2200 vibration comparator. The VC-2200 makes judgment based on the vibration level and sends the result to the PC. Also the VC-2200 outputs an analog signal to the CF-4700A FFT comparator, which performs frequency analysis of the signal. This enables block comparison of vibration level of the stepping motor which cannot be judged by only the VC-2200 to deliver a final judgment. The judgment result is sent to the PC in a similar way and saved.
Judgment area block (max: 20 blocks) is set up by the specified frequency range and the upper/lower-limit levels on the power spectrum.The most suitable judgment method can be selected from 6 kinds of judgment methods (level, peak level, peak max, insideMax, partial overall or area rate of content). Also control with a PLC* can be performed using comparator output through the digital I/O function.
The CF-4700A can be connected to a computer through LAN or RS-232C interface and the data can be saved.
Product list
| Model | Product name | Remarks | Qty | |
|---|---|---|---|---|
| 1 | CF-4700A | FFT comparator | 1 | |
| 2 | VC-2200 | Vibration comparator | 1 | |
| 3 | NP-3414 | Accelerometer with built-in preamplifier | 1 | |
| 4 | NP-0153 | Signal cable for the NP-3414 | 1 | |
| 5 | NP-0021 | Miniature/BNC conversion connector | 1 | |
| 6 | VC-0352 | AC/DC converter | 1 | |
| 7 | AX-5022A | RS-232C output cable (2m) | 1 |