This step needs much more detail and possibly even a video tutorial. The steps are way too vague and unhelpful.
I'm supposed to strum the "left and right" belt? What does that mean? This printer has two belts, top and bottom. Am I supposed to strum the top belt on the left and right side? It seems like no matter what I do one side always has more tension than the other.
Really, this entire chapter is incomplete and mostly unhelpful.
This step could use some more detail, while tuning the belts my X axis got sheared and the back would have a 5mm gap on the right while the front has a 10mm gap on the left. The belt tensioner on the right constantly read above 100Hz, and eventually the tensioner just fell out entirely while trying to reduce tension. On the left side the opposite happened at 80Hz, and the tensioning bolt required so much force that the head broke and it is now completely stuck in the belt-tensioner-left.
I can't agree with the other comments here. This step was pretty straigforward for me and took me less than 10 minutes. Both belts 85/86 Hz respectively and gantry without gaps on both sides.
This is the worst part of the entire build. Up to this point, the instructions have been pretty clear and easy to follow. But this part is very confusing. The article they link you to seems to assume you have an assembled or already working Core One. It gives no advice on how to initially tighten the belts. I spent two hours on this section. The mobile app is very unresponsive for the belt tuner. The web app is just slightly less worse. I found my laptop using the web site tuner with an external mic gave me the best results. I just ended up tightening each side until the corners were both flush against the front tensioners. I then did use the web app with my laptop and an external mic to get the best results of having it actually detect a sound. I then tuned them close to 85Hz, but then I found if I pulled the print head forward the right side would not be flush against the front tensioners. So, I had to tighten that side. I ended up with the left being in the low 80's and the right side being in the upper 90's. This has allowed it to pass calibration and I've been printing fine for 3 days. I did try to start the process over again and get them both closer to 85Hz, but each time my right side would not be flush with the front tensioner. So, I found my right side had to be tighter and at a higher than recommended frequency to work. But it does work and prints are good.
at this point it is strange! first adjust the belt and afterwards start the initialization process. But for the belt adjustment the print has to be initialised...
I'm supposed to strum the "left and right" belt? What does that mean? This printer has two belts, top and bottom. Am I supposed to strum the top belt on the left and right side? It seems like no matter what I do one side always has more tension than the other.
Really, this entire chapter is incomplete and mostly unhelpful.
I just ended up tightening each side until the corners were both flush against the front tensioners. I then did use the web app with my laptop and an external mic to get the best results of having it actually detect a sound. I then tuned them close to 85Hz, but then I found if I pulled the print head forward the right side would not be flush against the front tensioners. So, I had to tighten that side. I ended up with the left being in the low 80's and the right side being in the upper 90's. This has allowed it to pass calibration and I've been printing fine for 3 days. I did try to start the process over again and get them both closer to 85Hz, but each time my right side would not be flush with the front tensioner. So, I found my right side had to be tighter and at a higher than recommended frequency to work. But it does work and prints are good.