Replacing the nozzles

Replacing a nozzle : before starting

Nozzles can be swapped in order to change nozzle diameter or material for special filaments or to change an old nozzle with a new one.
Regardless of the reason and the modle of the head the procedure requires the following conditions:

Remove the filament from the nozzle by unloading the filament
Remove the head while the unit is idle and the nozzle is cold.

Tools

Safety

Notice

Notice: we suggest to discard any previously used portion of the filament after it’s processed into the feeder, as it can be compressed and grinded during the extraction.

Printing Head PRO

Get ready
Gather all the parts: the provided monkey wrenches, a T8 screwdriver and the desired nozzle.
Optional: metal sponge for cleaning.
Unscrew the protection heatshield
Remove the two screws on the side with a T8 screwdriver.
Remove the shield
Gently remove the shield. Note that the fan cable must not be pulled at any time.
Clean (Optional)
This is a good time to gently clean the hotend from any plastic residue.
Unscrew the nozzle.
Use the two wrenches to unscrew the nozzle. keep the hotend firm with one wrench and unscrew the nozzle with the other wrench just like you would normally (counterclockwise).
Extreme force is not necessary. Make sure to not hit any cable of part that could break.
Change nozzle
Now screw the new nozzle back in manually and use the wrenches only to fasten it at the end.
As a rule of thumb once you hit resistance the nozzle can still be screwed in for 10-20 angular degrees.
If the nozzle is not tight enought plastic will find a way outside the thread, causing a nozzle failure and a nasty plastic overflow.
Reinstall the shield
The heat shield must be reinstalled. Make sure the wires are not in the way by gently pushing them back in to the respective hole.
Done!
Done! Renstall the head with the FABUI head installation procedure, load the filament and extrude some plastic or run a small print to prime the nozzle.

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Printing Head Lite / V2, Hybrid Head

Get ready
To change the nozzle on a Print Head V2 you’ll only need the two Wrenches usually provided with the unit.
Inspect the nozzle
Make sure the nozzle is clean and has no dust or residues in the orifice.
Unscrew the nozzle
With one wrench keep the hotend still (right wrench in this image), with the other wrench turn the nozzle counterclockwise to unscrew. The nozzle should unscrew fine after a little extra force is applied to fight the initial friction.
manually unscrew
You can unscrew the whole nozzle by hand once the initial friction has been overcome.
Inspection
Make sure the final nozzle is clean and void of any dust, epsecially the screw.
Installation
Now you can manually and gently screw the nozzle down to around 1 mm distance from the metal base.Use the wrenches to force it screwed in. Once you feel some resistance you can still screw around 10-20 angular degrees more than that.
If the nozzle is not tight enought plastic will find a way outside the thread, causing a nozzle failure and a nasty plastic overflow.
Reinstall head & prime
Renstall the head with the FABUI head installation procedure, load the filament and extrude some plastic or run a small print to prime the nozzle.