I started following the belt tensioning guide, and the first suggestion was to use the built-in tuner in the printer itself. But I was unsure about that since I have not yet booted it up? I then tried the website app, but that didn't pick up my microphone. Then, I installed the prusa app on my android, and that worked as expected.
Tried the web site and it would only show frequency occasionally and could not use it. I do not have an android device so the app would not work. Tried some iphone frequency analyzer apps and just to sensitive to other noises in house. Tried my guitar tuner and just not enough volume from belt. Broke down and got a stroboscope on Amazon for $99. Worked perfectly. you just need a dark-ish room
I think that the latest firmware of the COre One has a stroboscobe effect by itself. It uses the LED strip ounted in the front bar of the Core XY sheet. You' ll see this when you power up the machine.
I could not get the tuner app (phone or web) to work. I also tried multiple other suggested apps for tunning by frequency, none of them worked. This simple print worked for me the on the first try: https://www.printables.com/model/1312851-prusa-core-one-belt-tension-gauge
For me I found a needles width away from max worked. I just had to make sure both belts were the same. Hope this helps someone else.
Once I had the upper belt at 98Hz, my lower was 96Hz. I had to google how to adjust only one of the belts at a time as I couldn't find this in the Prusa guidance.
I stumbled on something that stated the left adjuster screw is for the upper belt and the right adjuster screw is for the lower belt. I soon had both belts correctly tightened after finding this snippet of info.
For me I found a needles width away from max worked. I just had to make sure both belts were the same. Hope this helps someone else.
I stumbled on something that stated the left adjuster screw is for the upper belt and the right adjuster screw is for the lower belt. I soon had both belts correctly tightened after finding this snippet of info.
This may be obvious and just something I missed!