⬢On the printer screen, navigate to Control ->Pick/Park Tool ->Pick tool, and select the tool that has the nozzle to be changed.
⬢Move the extruder approximately to the center of the X-axis.
⬢If you have loaded the filament, unload it from the hotend. On the screen, navigate to Filament -> Unload Filament.
WARNING: The hotend and heatbed are very HOT. Do not touch these parts!!!
⬢Remove the filament from the hotend. It is not necessary to completely remove it from the printer. Just a few centimeters (inches) above the extruder.
WARNING: The hotend and heatbed are very HOT. Do not touch these parts!!!
For the following steps, it is necessary to have the heaterblock and the hotend clean from the remains of the filament. Otherwise, it can be difficult to release the nozzle.
If you have a Prusa hotend sock on the hotend, remove it.
⬢On the printer screen, go to Preheat and select the latest used material. (e.g. ABS)
⬢Wait at least 5 minutes. The remains of the filament must be warmed up slightly so that they can be removed more easily.
⬢Using the brass brush, carefully clean the heaterblock and the hotend from the filament residue. Avoid contact of the brush with the hotend cables, as this could cause a short circuit.
⬢When the heaterblock and the hotend are perfectly clean, cool down the printer. On the screen, navigate to Preheat -> Cooldown.
Wait until the hot parts are cooled down to ambient temperature. It takes approximately 10 minutes.
⬢Insert the Torx TX 8 key all the way through the Tool Plate until it reaches the grub screw in the extruder. Loosen the screw. Do not remove the screw, a few turns are enough!
⬢Carefully pull the hotend assembly out of the extruder.
⬢At the same time push the hotend cables behind the fan out of the extruder.
⬢Push the hotend cable behind the heatsink fan up to the electronics.
⬢Locate the hole in the heatsink from the bottom of the extruder and insert the hotend nub into the heatsink.
⬢Push the hotend all assembly the way in.
⬢Rotate the heaterblock as in the picture. There must be approximately 35° - 40° angle to avoid damaging the hotend cables. (picture of angle)
⬢Maintain the position and using the TX 8 Torx key tighten the grub screw to secure the hotend. Do not use extra force while tightening, it may damage the hotend tube.
⬢That's it, good job! You just successfully installed the Prusa Nozzle on your Original Prusa XL.
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