7.3.1.1 Hardened steel nozzle
Hardened steel nozzles are a must for highly abrasive materials. Regular brass nozzles will
degrade very quickly and lose their properties.
Most of the abrasive materials are composites, plastics with something mixed in. Some
examples are ColorFabb XT CF20, ColorFabb Bronzefill, ColorFabb Brassfill and some glow
in the dark filaments. Always ask your filament vendor if you are not sure. Slight
disadvantage is that some standard materials like ABS aren’t possible to print as fast as with
regular nozzle.
7.3.1.2 0.25mm nozzle
To get finer detail on 0.1mm or 0.05mm print settings, you can use 0.25mm nozzle. But use
it for only very small objects, only couple centimeters big. The print time can be considerably
longer compared to 0.4mm. Ideal use is jewelery.
8 Advanced calibration
With firmware 3.0.12 new calibration options were added. They are optional or experimental
and are intended for advanced users.
8.1 PID tuning for Hotend (Optional)
In case 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, check that your hotend thermistor is properly seated in the heater block and
plugged to your miniRAMBO board first.
You can find this feature in
Calibration - PID calibration
. In this menu you have the option
to choose the temperature for which 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, nozzle will heat up to the set temperature in 5
cycles. During 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 it 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
.
35
Summary of Contents for Original Prusa i3 MK2S 1.75mm
Page 1: ......
Page 25: ...Pict 11 Probe response diagram Now you are done 25 ...
Page 61: ...Pict 35 Nozzle change 61 ...
