Prusa i3 MK2S KIT - M Esh B Ed L Evelling

Please make sure you really move the Z carriage up to the end stoppers until you hear a
rattling sound as the Z stepper motors skip steps. This procedure ensures, that 1) the X axis
is perfectly horizontal, 2) the print nozzle is in a known distance from the print bed. In case
the Z carriage did not touch the end stoppers, the printer could not possibly know the height
of the print nozzle above the print bed and it could therefore crash into the print bed during
the Z calibration procedure.
The Z calibration procedure also prompts you to "Please   clean   the   nozzle   for   calibration.
Click   when   done."
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 levelling
Mesh bed levelling can be found in Calibration menu. It is the same procedure which is
performed before every print. You can use it to check the P.I.N.D.A. probe alignment with
the calibration points however it is not necessary during the calibration process as Mesh bed
leveling is a part of Calibrate XYZ and Calibrate Z routines.
Before running this command clean the nozzle tip from any debris and run it while the
nozzle is cold. If the probe is misaligned and the nozzle is preheated, the nozzle can
make permanent impressions in the print surface.
Pict.   5   -   The   probe   must   be   inside   the   circles   (1st   and   9th   calibration   point)   to   successfully
level   the   bed  .
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