Prusa i3 MK3 - Advanced Features and Maintenance; Advanced Calibration Techniques

8  Advanced Calibration
Additional calibration tools and settings for advanced users are available, but they are
entirely optional and some of them are even experimental.
8.1  PID tuning for Hotend (Optional)
If you are experiencing wide swings in temperatures of your nozzle (e.g +/- 5 C°), you shall
do PID tuning on your printer. If   you   are   experiencing   major   temperature   fluctuations   higher
than   that,   first   check   that   your   hotend   thermistor   is   properly   seated   in   the   heater   block   and
plugged   into   your   EINSY   board.
You can find this feature in Calibration - PID calibration. In this menu you have the option
to choose the temperature for which the PID will be run. Set the temperature with which you
print the most as it will tune it for that the best, however, general stability will improve for all
temperatures (PLA/ABS/PETG). After that, the nozzle will heat up to the set temperature in 5
cycles. During the cycles it is mastering the amount of power needed to reach the
temperature and maintain it.
Do not touch the nozzle during this process until the process is fully finished as it
will reach high temperatures!
Be aware that PID tuning is not a solution for all of the temperature fluctuation issues.
Always make sure that your printer is located in a room with stable ambient temperatures,
more about that in Thermal Runaway and Temperature Drops at help.prusa3d.com  .

8.2  PINDA probe calibration/ Temp. calibration (Experimental/Optional)
All induction proximity probes drift the sensing distance with increased temperature. This
might affect the quality of the first printed layer. PINDA v2 probe, included in the MK3, has
an embedded thermistor inside it’s body to measure the temperature and fully compensate
for the drift.
A precalibrated data table is stored in the printer and the temperature calibration is active by
default.
You can re-calibrate the data table from the menu; it can be found in Calibration - Temp.
calibration - Calibrate. Before you do so, please make sure that your nozzle and heatbed
are perfectly clean as the extruder will be moving around the heatbed during this process.
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