Renkforce RF2000 v2 Series - 21 Maintenance; A) General Information; B) Cleaning

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21. Maintenance
a) General information
Periodically verify the technical safety of the 3D printer, e.g. check for damage to the mains cable and the casing.
If you have reason to believe that the device can no longer be operated safely, disconnect it immediately and make sure it is not operated
unintentionally. Pull the mains plug from the mains socket!
It can be assumed that safe operation is no longer possible if:
• thedeviceisvisiblydamaged
• thedeviceisnolongerworking
• thedevicewasstoredunderunfavourableconditionsoveranextendedperiodoftimeor
• thedevicehasbeensubjectedtoheavystressduringtransport
Always observe the following safety information before cleaning or servicing the 3D printer:
Live components may be exposed if covers are opened or components are removed.
The device must be disconnected from all power sources before any servicing or repair work is carried out.
Capacitors inside the device may still carry voltage even though they have been disconnected from all power sources.
 Onlyqualiedexpertsfamiliarwiththehazardsinvolvedandtherelevantregulationsmustperformrepairs.
If you perform work above the printing plate (e.g. at the extruder), cover it with a suitable protection (e.g. cardboard). Falling
objects may easily damage the printing plate (loss of warranty/guarantee).
b) Cleaning
Device
The outside of the 3D printer should only be cleaned with a soft, dry cloth or brush.
Never use any aggressive cleaning agents or chemical solutions on plastic parts, stickers or the display since these parts would be
damaged otherwise.
Nozzle cleaning
Caution: Danger of burns. Do not touch the hot nozzle directly.
Outside cleaning of the nozzle:
Carefully wipe off the extruder nozzle after each print using tissue paper or similar.
Thenozzlestillhastobehotforthis.Ifthisisnotthecase,heatuptheextrudernozzlerst.
Inner cleaning of the nozzle:
Method 1:
Heatuptheextruderandactuatethemanualfeedforwardandbackwardseveraltimesuntilenoughlamentisextruded.
Method 2:
Iftheextrudercontinuesnottoextrudeenoughmaterialafterthisprocedure,lettheextrudercoolofftothelowermelttemperatureofthela-
mentasindicatedbythemanufacturer(lamentmaterialmustonlybeviscousanymore)andcarefullyconrmmanualinfeedbackwardsuntil
thelamenthasbeentransportedoutoftheextruder,includingcontamination.Cutoffthecontaminatedpartofthelamentandreinsertitafter
heating up the extruder again.