Wizard and Z-Axis Calibration Fail  

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james.f31
(@james-f31)
New Member

Hi All,

I am brand new to the world of 3D printing.  I purchased my Prusa MK3 just over a year ago and I am finally getting around to putting it together.  Assembly is complete, but both the wizard and the Z-axis calibration are failing the same way.  X and Y seem okay, and the machine drives the extruder to the top of the Z-axis as expected. That said, as soon as calibration begins, it fails IMMEDIATELY when driving the extruder *down* the Z-axis.  Like, it moves a few mm and fails with the following error:

"Calibration failed! Check the axes and run again"

I have a video that I will try to post showing the exact problem.

Firmware has been updated to 3.9.0.  Obviously we did something wrong in assembly, but I have no idea where to start looking.  Anyone ever seen anything like this?  Any ideas where to begin?  Many thanks in advance -- I can't wait to (finally) start using this thing!

--Jim.

This topic was modified 2 months ago 2 times by james.f31
Posted : 29/08/2020 4:14 pm
GkMakeIt
(@gkmakeit)
Estimable Member

Try loosening the two screws on both sides holding the trapezoidal nuts on just to the point they can move with a little resistance, try the Z calibration again. If it works move the Z as high as possible then tighten the screws. 

Posted : 29/08/2020 7:33 pm
james.f31
(@james-f31)
New Member

@gkmakeit

Thanks, I'll give that a try and report back!

Posted : 29/08/2020 10:31 pm
james.f31
(@james-f31)
New Member

Well, I promised to report back...but I am more than a little embarrassed to do so.  The issue was...wait for it...that the PINDA probe cable never got plugged in to the board.

Um, yeah.

From inauspicious beginnings?...

Posted : 31/08/2020 8:45 pm
GkMakeIt
(@gkmakeit)
Estimable Member

Glad to hear you figured out the issue.

We all have those moments!

Posted : 01/09/2020 1:33 am
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