Bed leveling keeps failing before printing
Seriously could do with some help. I assembled my Prusa kit a few days ago and since been struggling to understand what's causing the bed leveling fail every time I try to print something, mainly the calibration.gcode from the sdcard. Self test went ok. XYZ calibration test also with "severely skewed" result, but that I assume should still be ok. Watched the famous Thomas Sanladerer assembly video from youtube and he had the same xyz calibration result but later didn't encounter my problem. I've attached below a video from what happens. There's an immediate grinding noice after start and the whole thing stops with the "Bed leveling failed. Sensor didn't trigger. Debris on nozzle (which there wasn't). Waiting for reset". I've made the visual y axis alignment test and things looked nicely perpendicular. Also in my opinion the belts are not too tight nor too loose. Also the calibration tests went through without a similar problem. Thanks in advance 😉
https://db.tt/9aQiSWilby
Re: Bed leveling keeps failing before printing
Like very often happens, I've managed to solve the problem on my own. Regardless of what the xyz calibration said, I reassembled the whole thing with much greater care than the first time. I made many adjustments, but since the y-axis is the most critical component of the printer, that probably had the biggest impact. In fact, most problems people have probably have something to do with the y-axis not being enough accurately assembled/perpendicular even if the software tries to compensate. I don't know if Prusa people are actively reading these messages, but when I made the reassemble I didn't follow the official instructions and that made it easier for me to get it right. I don't know, maybe I just lack the needed intelligence to correctly follow written and illustrated instructions. Looking at the forum I think I'm seeing a lot of people suffering from problems that are likely caused by the y-axis too, so maybe give a second look for the y-axis assembly section in your manual ? Just a thought. I felt like that the use of Prusa i3 frame as a jig to help make the y-axis really square left too much room for error. I got better results when I didn't use it.