The Original Prusa i3 MK3 is the successor of the award-winning Original Prusa i3 MK2 3D printer.

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nozzle / pinda calibration

I got my MK3 kit, built it and calibrated it without any special problems.

I successfully printed something like 10 or 15 prints

and then had my first failed print.

I am now trying to re-calibrate it and when I get to the first layer calibration I can see that the nozzle is so high above the printer that it just drops the filament onto it (i.e. its too high).

I am a bit confused on the order of doing things.

The PINDA adjustment part of the kit assembly is shown to be performed without the steel sheet and the the "Calibrate Z" requires that the printer be without the steel sheet on?

It seems like aligning based on the zip tie height does not work that well (it positions the nozzle too high and live-z only seems to allow me to adjust z upwards...

1) what does the PINDA sensor (by the way - what does PINDA stand for?) sense ? the bed or the steel sheet?

2) what should be the height of the nozzle above the bed when adjusting the pinda? 3) and what height should the pinda be above the nozzle ?

4) why does Z adjustment not let me move the nozzle downwards to make the printed material more "squished" as explained in page 24 of the manual?

also I wanted to say that when Z calibration starts it first moves on X and Y and if the nozzle is touching the bed it might damage the bed and it might be smarter to first move up on Z before moving horizontall.

Answer this question I have this problem too

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Hi there,

The calibration you are talking about is the XYZ calibration, which calibrates the skew of the axis and makes sure that your printer can print without any problems even if there would small misalignments.

The calibration you should do in order to make the 1st layer to stick, is the First layer calibration. This is suppose to be done with the steel sheet on the heatbed. I would highly suggest checking out this video, where we demonstrate how to properly and completely calibrate your printer https://www.youtube.com/watch?v=GE-lrRbU....

Hope this helps,

Tom

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I have the same issue. System crashed, the PINDA was moved. We reset/recalibrated PINDA adjsutment but during XYZ calibration my Printer nozzle sits a good 3 to 4mm above the bed! It does not come close enough to the paper to make any contact.

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Hello Paul, I´m having the same problem, did you finally get to a solution?

Cheers

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Hey there! I'm not from the Prusa Support team but may be able to help.

Even if the PINDA height was recalibrated (using the trick of putting a cable tie under it like in the manual), that doesn't mean it will be perfect. If the extruder is still too high, there may be an issue with the PINDA height, so I would suggest moving it up a little (so the extruder finishes lower).

Once again, if the hotend catches on the paper, power off the printer!

I hope this helped, and good luck to you two!

Mathieu

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Hello Borja,

In case of the issue feel free to contact Prusa technical support on LiveChat or email: info@prusa3d.com. The PINDA probe must be so low that the Z axis value is detected before the nozzle touches the paper during the calibration. The Fisrt layer calibration is well-described here - https://help.prusa3d.com/article/ZhBlGFD....

- Official Prusa Support

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