Prusa i3 MK3 - Filament Management

If this advice is not followed and there is a plastic debris on the print nozzle, then the debris
may touch the print bed or even push the print bed away from the PINDA probe, so the
PINDA probe will not trigger properly and the calibration will fail.
6.3.7  Mesh bed leveling
Mesh bed leveling can be found in the Calibration menu. It is the same procedure which is
performed before every print. It’s also the same procedure that happens in the second round
of XYZ calibration.
The PINDA probes 9 points in a grid manner on the sheet plate (whether it’s powder coated
or smooth PEI doesn’t matter) and measures the distance to the sheet. These points are
interpolated and used to create a virtual mesh of the bed. During printing, if the bed is
slightly warped, the probe will still precisely follow the surface according to its measured
mesh. The deviation limit for the compensation is +-50μm (or 0.05 mm).
Pict. 8 - Visualisation of mesh bed leveling

6.3.8  Loading the filament into the extruder
To load filament, simply insert it into the extruder. Make sure that the filament tip is nice and
pointy. Printer will prompt you to select the inserted filament material, preheat the nozzle and
finish the loading with a small extrusion. Alternatively, if the printer was preheated already,
everything is fully automatic.
Filament can be loaded from the LCD menu, for example, even if the filament sensor is
disabled in the settings.
● Press the LCD-knob to enter the main menu on the LCD. Rotate the button to choose
Preheat option and confirm by pressing the LCD-knob. Next you choose the material
you will print from. Choose a material; then confirm with the LCD-knob. The nozzle
and heatbed will heat to the requested temperature.
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