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"Mesh bed leveling failed?"  

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gisborne
(@gisborne)
Active Member
"Mesh bed leveling failed?"

Trying to complete the calibration process.

I get to an instruction that says something about once the plastic in the next step starts extruding, I should adjust the z height so something something.

But after I click next, the head starts moving about, I think trying to lay down filament at various places, and turning the knob does nothing. After it gets to the front left point, it bumps into the bed and then displays an error about failing and should I retry or cancel.

Posted : 20/12/2019 10:32 pm
dewolla
(@dewolla)
Active Member
RE: "Mesh bed leveling failed?"

My initial setup and printing went fine but now when I try to print or  mesh level,  the left side is way up in the air.

It’s contestant as best I can tell, but wrong.
so my situation is a little different but maybe there is a common problem with the left side?

i tried a factory reset but still get the issue.

Posted : 21/12/2019 4:09 am
Bernd
(@printguy)
Active Member
RE: "Mesh bed leveling failed?"

That sounds like the problem described here that the sensor is set to high.
https://forum.prusa3d.com/forum/assembly-and-first-prints-troubleshooting/distance-m-i-n-d-a-probe-to-nozzle-tip/

And because it happens only on the left side then you may have also the same problem I had, solved in this thread:
https://forum.prusa3d.com/forum/assembly-and-first-prints-troubleshooting/mesh-bed-leveling-failed/

Posted : 21/12/2019 11:47 am
dewolla
(@dewolla)
Active Member
RE: "Mesh bed leveling failed?"

My issue looks to be with the MINDA sensor and the wiring for it. When I undid the zip ties and checked the wires everything looked ok on the outside, but I bent the MINDA wire right at the top of the sensor to about 100 degrees and held it while doing a mesh level calibration and it seemed to work correctly, but if I left the wire free it would fail (see video below of what it would do). 
So with the zip ties on it the sensor would work when on the right side of the bed but when it went out to the left the wires would shift enough and it would have a bad detection.

Support is sending a new sensor, will take care to not over tighten zip ties when reinstalling.

Here is a video of my specific issue.

 

Posted : 21/12/2019 5:14 pm
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