Bed leveling problem
Hi @all,
got a MK3S from a former colleague. Did't know anything about it, so updated firmware and made a factory reset.
Now i figured out that I've problems by printing in the corners. Looks like the z-value is not right. So I did all i found about bed leveling and noticed that he did the nylock mod, good for me... Corrected the bed with octoprint and prusa leveling guide. I have a bed variance of 0.0xx. After that I did another complete reset with initialisation, but again: I can print very well in the middle of the bed, but not at the corners.
Also I did the z-leveling, which looked very well (in the middle). If I print first layer tests, I have two corners that fail and I don't know how to fix.
The bed should be flat, but I have working corners and non working corners with same values according to the leveling guide.
If the bed is flat how is it possible, that it is only working partly and not on every point of the bed?
Please send help 😀
Please run a first layer Z calibration and show us the print *on the print sheet*
Cheerio,
RE:
In addition to show a first layer calibration result on the print sheet, check in the LCD menu that mesh bedleveling is set to 7x7, z-probe nr to 3 or 5 and magnet comp to on.
It's sometimes a bit hard to know what everybody means, since z calibration is something different than first layer calibration.
Z calibration is part of the hardware calibration, if it fails it's normally an assembly problem: https://help.prusa3d.com/article/failing-z-calibration-mk3s-mk2-5s_160858
First layer calibration is the build in calibration of the PINDA/nozzle offset done with the LCD menu https://help.prusa3d.com/article/first-layer-calibration-i3_112364
Finally there are octoprint plugins and printer mods, bedleveling "my way" or the other way and of course the build in bed level correction ( https://help.prusa3d.com/article/bed-level-correction_2267 ) which is classified as advanced calibration for a reason.
You should be able to get you printer working reliable by only running the xyz calibration in the LCD menu and there after load filament and do the first layer calibration (a few runs will be needed depending on your machine's offset and on how fast you are turning the selector knob). Post a picture of the last run and get feedback here on the forum.
Everything else is only to get even better and precise results but is not necessary to print with decent results. I'd stay away from it until your printer works with just the build in first layer calibration done.
The print bed needs to be clean and free of grease of course...
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