Instructables
Picture of What is Coherence?

When someone is talking and you cannot understand them, you would describe their speech as “incoherent”. They are trying to say something, but you are not hearing or receiving it correctly. If you could understand 80% of the words they are saying you could probably make it out and they would then be "coherent".

The same applies to the “coherence” of the tap test.

 
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Step 1: What is Coherence?

Picture of What is Coherence?

When someone is talking and you cannot understand them, you would describe their speech as “incoherent”. They are trying to say something, but you are not hearing or receiving it correctly. If you could understand 80% of the words they are saying you could probably make it out and they would then be "coherent".

The same applies to the “coherence” of the tap test.

Step 2: Sending and Receiving

Picture of Sending and Receiving

We are applying a measured force ("speaking") to the tool with the hammer. We want the accelerometer to receive the vibration and see only vibration from that force ("hearing") as much as possible. A reading of 80% is considered “coherent”, below is “incoherent”.

Coherent measurements above 80% are essential to produce accurate Dashboards.

Step 3: Checking Coherence - Step 1

Picture of Checking Coherence - Step 1

After completing the measurements for the X-axis, click on the Coherence button in the menu on the right side of the screen.

Step 4: Checking Coherence - Step 2

Picture of Checking Coherence - Step 2

Then click on the Cursor Tab on the far right of the menu, or press F3 to activate the cursor.

Step 5: Checking Coherence - Step 3

Picture of Checking Coherence - Step 3

You can then simply left click the cursor over the peaks of the waves in the lower box (locate it inside the center of wave, the cursor will automatically find the peak, you may have to make a couple of tries to get it to the peak) then read the coherence percentage in the menu. If it is above 80% you are taking good measurements.

wilgubeast3 months ago

Definitely consider adding WAY more context to your intro step. Or add more keywords to help people find this without having to go to your member page first.