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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 qualified 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 first.
Inner cleaning of the nozzle:
Method 1:
Heat up the extruder and actuate the manual feed forward and backward several times until enough filament 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 fila
-
ment as indicated by the manufacturer (filament material must only be viscous anymore) and carefully confirm manual infeed backwards until
the filament has been transported out of the extruder, including contamination. Cut off the contaminated part of the filament and reinsert it after
heating up the extruder again.