Prusa i3 MK3 - B Ed L Evel C Orrection ( Kit O Nly)

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Loosen the two screws on the probe holder to make adjustments. Rotating the probe

counter clockwise will raise it 1mm per turn. Rotating it is very handy for precise

adjustments, but it can also be pushed in and out when the set screws are loosened

completely. Then rerun Calibrate Z followed by the First layer calibration again.

Pict.



The



properly-tuned



first



layer



6.3.9.1  Bed level correction (kit only)

Bed level correction is an advanced feature that is designed to allow advanced users to

correct for the slightest imperfections in the first layer. This feature can be found in

Calibration - Bed level correction. For example, if the first layer seems to be ever so

slightly more squished on the right side, you can virtually raise the nozzle by +20 microns on

the right side. Settings are available for Left, Right, Front and Back. The limit is +-50 microns

and even +-20 microns can make a huge difference. When you are using this function, do

small incremental changes. A negative value will act as lowering the bed in the selected

direction.

6.3.10  Fine tuning the first layer



6.3.10.1  Print Prusa logo

After finishing the calibration gcode, it is a good idea to print a simple object. The Prusa logo

from the supplied SD card is a great example. The Live adjust Z function (described in

6.3.9. First layer calibration) works during every print, so you can fine tune at any point. You

can see the properly-tuned first layer in Pict. 12.

Calibration might be slightly different for different steel print sheets as the coating

thickness varies. It is a good practice to check the first layer and adjust accordingly

with Live adjust Z when switching between different types of steel sheets.

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