Quite frustrating step, but found a workaround to perform the calibration... back then with the MK4 and MK4S, it worked really nicely but for some reason this time the website can only detect the sound right after activating the microphone. The workaround has been to go back to select the printer and reactivate the microphone every time I made a measurement. Long process... Also would be great to understand better what happens when tightening or looseing only one side. From what I noticed it allowed me to find the sweet spot to achieve both frequency. (I had one belt above the ideal frequency and sadly the other belt below)
When I ran the initial tests the Y axis failed. I had never tensioned the belts and they were completely loose. I increased the tension on both axes based on gut feel, ran the tension app, made some more adjustments, and was good to go in about 5 minutes. I used the app on my iPhone Pro Max 16.
I used a tone generator and pitched matched to that. The tension app doesn't work well at all--perhaps the worst experience I've had in building the MK4S and now the Core One.
I had issues with the belt tensioning app not detecting me strumming the belts consistently. Sometimes it works, but mostly not. But this is most likely entirely up to my phone (Google Pixel 6).
As a workaround I used https://onlinetonegenerator.com/ to play reference tones and I just tuned the belts using my ears.
The upper one should have 86 Hz, the lower one 82 Hz.
And both belts influence each other, so you will never be able to have them both perfectly in tune, but a few Hz up or down don't matter at all.
As a workaround I used https://onlinetonegenerator.com/ to play reference tones and I just tuned the belts using my ears.
The upper one should have 86 Hz, the lower one 82 Hz.
And both belts influence each other, so you will never be able to have them both perfectly in tune, but a few Hz up or down don't matter at all.