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B-2 User Manual 589402
Cleaning and replacing the printing nozzles
Whenever you change the material used for printing, it is advised to replace the printing nozzle.
To replace the nozzle, the extruder must be hot - at its operating temperature - to allow the material residues
inside the head to soften and not create obstructions during the replacement operation.
WARNING: when operating always wearing safety gloves to protect from heat.
To replace the printing nozzle:
1. Hold the hot-end block immobile using a 12 mm hex wrench .
2. Unscrew the nozzle using the 10 mm hex wrench
.
3. Wrap the thread of the new nozzle with three turns of Teflon tape, being careful not to obstruct the material
feeding hole
.
4. Mount the new nozzle .
5.
Perform the calibration procedure for the printing height as described in the paragraph “Adjusting the
printing nozzle heights”
.
Figure B-1 Preparing the new printing nozzle
Under normal circumstances, it should not be necessary to clean the nozzle. However, should this become
necessary, unmount the nozzle as described previously and use a pin of a smaller diameter than the nozzle to
clean it.