Introduction
The goal is to filter out unwanted vibrations that could lead to false production detections while the machine is stopped. These undesired vibrations—often residual or caused by external sources such as a fan—can disrupt the detection of the machine’s true operating state.
Before using the advanced feature, we highly recommend you to reach out to the support or your usual Keyprod contact, to be assisted during the procedure.
This step-by-step guide explains how to configure the noise attenuator from the KEYNETIC’s internal web configuration server.
In order to do so, you need to be able to turn your machine ON without producing ("machine stopped") and to be able to launch the production of some parts ("machine running")
Step 1 : Use the device to identify the noise
Access to the Machinoscope view
On the Keynetic screen, open the "Machinoscope" view and go to the second page by swiping or clicking to the button and the bottom of the page.
You’ll see a frequency/amplitude spectrogram:
The X axis represents the frequency (in Hertz, HZ) and the Y axis the amplitude of the signal. Each visible peak corresponds to a frequency where a vibration is present.
Identification of the noise
- When the machine is stopped : Look at the visible peaks. These indicate residual vibrations or ambient noise, and should be filtered out. You can write down the beginning and end of the frequency bands to exclude, or take a picture of the spectrogram.
- When the machine is running : launch a production, ideally one of a production for which you consider the vibration to be incorrectly detected. Observe again. Peaks that are new or significantly stronger are generally linked to actual production activity.
At the stage, the noise attenuator might not be the right solution. We highly advice you to consider challenging the positioning of your device or its external sensor so that you find a measurement point for which you can better distinguish when the machine is running and when it is not. Ideally, this point is as far as possible from noise sources unrelated to production (e.g. fans, conveyors, etc.). If it is impossible, please go to the second step.
Step 2 : Configure the noise attenuator via the web interface
Access the web interface of the Keynetic (the detailed explanation can be found in the setup guide)
1. Clic on "calibrate calculators" on the home page.
2. Access the advanced mode of the calibration by clicking on "advanced" on top of the screen
3. On the calibration page, clic on the calculator called "Noise attenuator"
4. The page display :
- On the left: Fields to define the frequency bands to filter, under Undesired Frequencies
- On the right: The Datascope view (frequency vs. time, with color intensity)
For each band to filter:
- Enter the "start frequency"
- Enter the "end frequency"
Do not change any other parameter, or risk to compromise the quality of the captation of the data by your device.
- Click on "Validate" at the bottom of the page to save the configuration
Changes are applied immediately — no reboot is required.
Advices and good practices
Intermittent noise
Some unwanted frequency bands may appear sporadically, for example from an oil evacuation system that turns on at random times.
If these signals disturb detection, you may add a targeted filter later.
However, avoid filtering frequencies that might carry useful information for production detection.
Good practices
| Step | Action required |
|---|---|
|
Initial visualization |
Use the spectrogram of your Keynetic to identify bands to be filtered |
| Sensor placement | Choose a zone responsive to production, away from ambient noise sources |
| Machine stopped | Record residual noise frequencies to filter |
| Machine running | Confirm useful production frequency bands |
| Final configuration | Only fill in the bands to filter, then validate the page without changes |