Prusa i3 MK2S KIT - B Ed L Evel C Orrection ( Kit O Nly); F Ine-Tuning T He F Irst L Ayer; P Rint P Rusa L Ogo

Observe the line which is being extruded on the print surface. Go to the LCD menu and
choose the Live adjust Z option. A new menu will show up where you can tune the nozzle
height live during the test print. The point is to lower the nozzle until the extruded plastic
sticks nicely to the bed and you can see it is being slightly squished. Set value should not
exceed  -1 mm, if you have to adjust it more, move the probe slightly higher. Loosen
the two screws on the probe holder to make adjustments. By rotating the probe counter
clockwise, it will raise at 1mm per turn. It is very handy for precise adjustments, but it can
also be pushed in and out when set screws are loosened completely. Then rerun Calibrate Z
followed by the V2Calibration.gcode again.
Pict.   8   -   The   properly   tuned   first   layer
6.3.9.1 Bed level correction (kit only)
A bed level correction is an advanced feature introduced in the firmware 3.0.6 and 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. 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
gcode 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 finetune at any point.
You can see the properly tuned first layer on the images below.
Calibration might be slightly different for multiple materials. It is a good practice to
check the first layer and adjust accordingly with Live adjust Z when switching
between different types of filament. You can also try experimental feature 8.2 PINDA
probe calibration/ Temp. calibration.
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