How to replace a Dwarf board (XL multi-tool)

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Last updated a year ago

Difficulty

Moderate

Steps

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Step 1 Introduction

⬢This guide will take your through the replacement of a Dwarf board on the multi-tool version of the Original Prusa XL.

⬢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.

Step 2 Necessary tools

⬢For the following guide, please prepare:

⬢TX 8 Torx key

⬢Allen key 2.5mm

⬢Needle-nose pliers

⬢A cardboard box to use as a heatbed protection during the procedure. Hint: use the Prusament box.

Step 3 Unloading filament

The following step is necessary only if you have filament loaded in the tool that has the Dwarf board to be replaced.

⬢On the printer screen, navigate to Control -> Pick/Park Tool -> Pick tool, and select the tool that has the Dwarf board to be replaced.

⬢Unload the filament from the hotend. On the screen, navigate to Filament -> Unload Filament.

⬢Cool down the printer to room temperature. On the screen, navigate to Preheat -> Cooldown.

Wait for the printer to fully cool down to room temperature before proceeding further.

Step 4 Preparing the printer

⬢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.

Step 5 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.

Step 6 Undocking 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.

Step 7 Removing covers

⬢Using the 2.5mm Allen key, loosen the M3x12 screw to open the dwarf-cover-door.

⬢Using the TX 8 key, remove the M3x8bT and open the dwarf-cover-back.

Step 8 Nextruder cable bundle disassembly

⬢Push the QSM-M5 fitting on the Nextruder. At the same time, gently pull out the PTFE tube.

Each connector has a safety latch. It is necessary to press the latch before disconnecting. Otherwise, the connector may get damaged.

⬢Disconnect the main cable connector.

⬢Using a T10 key, slightly loosen the two marked screws.

⬢Slightly move the cable strip towards the larger key openings, and remove it from the Nextruder.

Step 9 Disconnecting cables

Each connector has a safety latch. It is necessary to press the latch before disconnecting. Otherwise, the connector may get damaged.

⬢Carefully slide up the dwarf-cover-base.

⬢Disconnect all the remaining connectors from the Dwarf board.

Step 10 Removing the Dwarf board

Avoid scratching the board with the divots and with the needle-nose pliers.

⬢Using needle-nose pliers, rotate the divots so that they are positioned vertically, and aligned with the holes.

⬢Carefully slide the Dwarf board out.

Step 11 Assembling the new Dwarf board

Avoid scratching the board with the divots and with the needle-nose pliers.

⬢Carefully insert the Dwarf board through the divots.

⬢Twist the divots using needle-nose pliers.

Step 12 Connecting cables

⬢Connect the E-axis motor

The main cable will be connected at a later step.

⬢The right-side area connectors have indications.

⬢Connect the following cables on the first column from the left, starting from the uppermost connector:

⬢HEAT TH: heatbreak thermsitor

⬢FS: filament sensor

⬢FAN1: print fan

⬢Loadcell

Step 13 Connecting cables

⬢Connect the following cables on the rightmost column, starting from the uppermost connector:

⬢HEATER: hotend heater cable

⬢HE TH: hotend thermistor

⬢FAN0: heatsink fan

⬢CHEESE: cheese board

⬢Double-check that all cables are connected and in the correct position, apart from the main cable.

Step 14 Covering Dwarf board top

⬢Carefully slide the dwarf-cover-base onto the Dwarf board.

Avoid scratching or damaging the Dwarf board.

Step 15 Nextruder cable bundle assembly

⬢Hook up the keyhole openings in the flexible plate of the cable bundle onto the screw heads.

⬢Using a T10 key tighten the marked two screws.

⬢Attach the cable connector into the top of the Nextruder.

⬢Insert the PTFE tube into the QSM-M5 fitting on the Nextruder. Push it all the way in.

Step 16 Re-assembling covers

⬢Using the TX 8 key, tighten the M3x8bT to attach the dwarf-cover-back.

⬢Tighten the M3x12 screw and close the dwarf-cover-door.

Avoid pinching any cables.

⬢Remove the cardboard box from the heatbed.

Step 17 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.

Step 18 Final check

⬢To check if everything is connected correctly, navigate to LCD Menu -> Control -> Calibrations & Tests. From that menu, test the following:

⬢Fan Test

⬢Loadcell Test

⬢Nozzle Heaters Test

Step 19 It's done

⬢That's it! You successfully replaced the Dwarf board on your multi-tool Original Prusa XL.

How to replace a Dwarf board (XL multi-tool)

How to replace a Dwarf board (XL multi-tool)

Step 1 Introduction

Step 2 Necessary tools

Step 3 Unloading filament

Step 4 Preparing the printer

Step 5 Protecting the heatbed

Step 6 Undocking the Nextruder

Step 7 Removing covers

Step 8 Nextruder cable bundle disassembly

Step 9 Disconnecting cables

Step 10 Removing the Dwarf board

Step 11 Assembling the new Dwarf board

Step 12 Connecting cables

Step 13 Connecting cables

Step 14 Covering Dwarf board top

Step 15 Nextruder cable bundle assembly

Step 16 Re-assembling covers

Step 17 Docking the Nextruder

Step 18 Final check

Step 19 It's done

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