4. CLEANING
4.1 Hotend cleaning
Each time after completed printing, clean the hotends by removing the remaining molten/burnt material that may
be on the outside of the nozzle.
To do this:
1. In the TUNE menu, set the heating temperature for the given hotend using +/- keys. Choose Tool 0 temp. option for T0
hotend and Tool 1 temp. option for T1 hotend.
2. Ensure good access to the hotend using the RISE HEATBED or LOWER HEATBED option in the MENU. Press and hold the
keys to move the heatbed smoothly up or down. Press the key once to move the heatbed at a short distance.
3. Using a non-flammable material or tweezers, gently remove the remaining molten/burnt material.
4. After cleaning the hotend, switch the heating off (TUNE → Tool 0 temp. / Tool 1 temp. → RESET).
3DGence DOUBLE P255 printer can also clean the hotends automatically by extruding a section of material. This function is
particularly useful when the user has to change the material or remove the remains of old filament or if the hotend has not
been used for a long time and is slightly clogged. The automatic hotend cleaning assistant is available during printing and in
the idle mode.
Hotend cleaning assistant:
1. Choose MATERIALS and then CLEAN NOZZLES in the main menu.
2. Specify the hotend to be cleaned – MODEL MATERIAL for T0, SUPPORT MATERIAL for T1 or BOTH TOOLS for both hotends.
Confirm the choice with CONTINUE key.
3. The process will start automatically.
4. After completed process, remove the rest of the filament extruded from the hotend.
4.2. Heatbed cleaning
Dirty or greasy heatbed may seriously hinder or make printing impossible. It is recommended that the heatbed should be
cleaned before each new printout.
Clean the printer's heatbed by following the instructions below:
1. Set the printer's heatbed in a position that makes it possible to clean the heatbed easily (MENU → RISE HEATBED / LOWER
HEATBED).
2. Switch off all heating elements of the printer and wait until they are cooled down completely.
3. Switch the printer off using the main switch and disconnect the printer from the power source.
4. Put protective gloves on.
5. Remove any residual plastic from the heatbed surface using the spatula. Next, soak a cotton (non-synthetic) cloth with a
solvent:
• 10% spirit vinegar,
• acetone,
• nitro cleaner,
• extraction naphtha
or clean the heatbed using a sponge soaked in detergent.
When degreasing, pay special attention not to expose the printer components made of plastic and painted components to
action of a solvent as it may damage them.
6. Wait for the solvent to evaporate completely.
ATTENTION: There are OHS instructions on the packaging of the solvents. The instructions must be strictly observed
– the solvent vapours may be harmful.