JA
  • English
  • Čeština
  • Español
  • Italiano
  • Deutsch
  • Polski
  • Français
Login

How to replace the Hotend assembly (XL multi-tool)

Menu

How to replace the Hotend assembly (XL multi-tool)

How to replace the Hotend assembly (XL multi-tool)
Relevant for:
Last updated 5 months ago
How to replace the Hotend assembly (XL multi-tool)
 Difficulty
Easy
 Steps
15
 Available languages
ENCSPLDEESITFR
Introduction
Introduction
This guide will take you through the replacement of the hotend assembly on the Original Prusa XL multi-tool.
To replace the Hotend assembly on the Original Prusa XL (single-tool) go to How to replace the Prusa Nozzle (XL single-tool)
The following instructions are compatible with all Prusa Nozzle diameters.
All necessary parts are available in our eshop prusa3d.com.
Note that you have to be logged in to have access to the spare parts section.
Necessary tools
Necessary tools
Necessary tools
For this guide, please prepare:
TX 8 Torx key
A cardboard box for use as a heatbed protection during the assembly. Hint: use the Prusament box.
Small brass brush for cleaning the nozzle
Preparing the printer
Preparing the printer
Preparing the printer
Preparing the printer
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.
Cleaning the hotend
Cleaning the hotend
Cleaning the hotend
Cleaning the hotend
WARNING: The hotend and heatbed are very HOT. Do not touch these parts!!!
If you have a Prusa hotend sock on the hotend, remove it.
On the printer screen, go to Control -> Temperature and set the nozzle temperature to 250°C on the selected tool head.
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.
Parking the tool
Parking the tool
Parking the tool
On the printer screen, navigate to Control ->Pick/Park Tool ->Park Current Tool.
Turn the power switch OFF (symbol "O").
From the rear side of the printer, unplug the PSU cable.
Protecting the heatbed
Protecting the heatbed
Before you proceed, it is recommended to protect the heatbed.
Make sure the heatbed is cooled down to ambient temperature. Place the empty cardboard box approximately to the front center part of the heatbed.
Removing the Nextruder
Removing the Nextruder
Removing the Nextruder
Remove the Nextruder, by pulling it outwards from the metal inserts.
Although a small resistance is expected, as the metal inserts are magnetic, use moderate force.
Carefully place the Nextruder on the cardboard box.
Disconnecting the hotend
Disconnecting the hotend
Disconnecting the hotend
Loosen the M3x12 screw to open the dwarf-cover-door.
Each connector has a safety latch. It is necessary to press the latch before disconnecting. Otherwise, the connector may get damaged.
Disconnect the hotend thermistor cable.
Disconnect the hotend heater cable.
Leave both cables free for now.
Removing the hotend
Removing the hotend
Removing the hotend
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.
Inserting the hotend
Inserting the hotend
Inserting the hotend
Inserting the hotend
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.
Connecting the hotend
Connecting the hotend
Connecting the hotend
Connect the hotend heater to the upper slot on the electronics board.
Connect the hotend thermistor to the lower slot on the electronics board.
Tighten the M3x12 screw and close the dwarf-cover-door.
Remove the cardboard box from the heatbed.
Docking the Nextruder
Docking the Nextruder
Take the Nextruder and place it carefully next to the dock.
Place the two metal inserts through the white holes in the dock. The magnets will help you dock the Nextruder.
Check that the Nozzle seal lightly touches the nozzle.
Final check
Final check
Final check
Final check
To check if everything is connected correctly go to Preheat and select any of the material temperatures (e.g. ABS with 255°C on hotend)
Go back to the main screen and watch on the bottom bar to see if the temperature rises.
Before you proceed to the next step, 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.
It's done
It's done
That's it, good job! You just successfully installed the hotend on your multi-tool Original Prusa XL.
Was this guide helpful?

Comments

Still have questions?

Still have questions?

If you have a question about something that isn't covered here, check out our additional resources.
And if that doesn't do the trick, you can send an inquiry to [email protected] or through the button below.

Contact us