Prusa i3 MK2S KIT - C Alibrate X YZ ( Kit O Nly)

The belt pulley is loose and slips on the motor shaft. It is important to tighten the first
grub screw on the flat piece of shaft, then continue with the second grub screw.
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6.3.5 Calibrate XYZ (kit only)
The Original Prusa i3 MK2S comes with a full mesh bed leveling feature, however
for this to work we need to first calibrate the distance between tip of the nozzle
and P.I.N.D.A (Prusa INDuction Autoleveling) probe.
The process is fairly straightforward, so let’s get to it. We also suggest to check
out our Guide for New User first at www.prusa3d.com/buildvideomk2 with calibration tips.
The purpose of the X/Y/Z calibration routine is to measure the skew of the X/Y/Z axes and to
find the position of the 9 calibration points on the print bed for the proper bed leveling. You
can run the XYZ calibration from Calibration menu on LCD panel. This should not be
necessary on the assembled printers as those are factory calibrated.
Place a sheet of a regular office paper (for example the checklist
shipped with every order) and hold it under the nozzle during the first
round (first 4 points being checked) of calibration. If the nozzle catches
on the paper during the process, power off the printer and lower the
P.I.N.D.A. probe slightly. See the P.I.N.D.A. probe response diagram in
6.3.10.2 Check probe height. The paper will not affect the calibration
process. The nozzle must not touch the print surface or deflect the bed
by any means. If everything went correctly, continue with the calibration
process.
Initiating this routine performs a series of measurements in three rounds: In the first round, 4
sensor points on the print bed are searched for carefully as to not touch the print bed by the
nozzle. In the second round, all 9 sensor points are found. In the last round the height above
the 9 sensor points is measured and stored into a non-volatile memory for reference, this
finished the Z axis calibration.
The progress and results of each step are displayed on the LCD. In case of errors found, the
XYZ calibration is interrupted and the reason for error is shown to guide in troubleshooting.
At the start of the XYZ calibration procedure the printer prompts you by a following message:
"Calibrating   X/Y.   Move   Z   carriage   up   to   the   end   stoppers.   Click   when   done.”
After that, the printer asks you to confirm this step: "Are   left   and   right   Z   carriages   all   up?"
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
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