Ultimaker 2 User Manual

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Ultimaker 2 User Manual Manual pdf 26 page image

26After a longer time of using your Ultimaker 2 you might notice some signs of “under extrusion”. This means that yourUltimaker 2 can’t extrude enough plastic and is usually shown by very thin or missing layers in a print. In most cases, itis caused by some dirt or carbonized material in the nozzle or another hot end part through which a (partial) blockage iscreated. When under extrusion appears it is recommended to use the Atomic Method in order to clean the nozzle andother hot end parts. Below, the process of this simple though very effective method is described.NOTE: It is also advised to use the Atomic Method when switching from a material that needs a higher printingtemperature to one that uses a lower printing temperature in order to make sure any residue from the previousfilament is removed.REMOVE THE FILAMENT• Go to MATERIAL > CHANGE in order to remove the filament and instead of inserting new material, select CANCEL• Keep the print head in the cornerREMOVE THE BOWDEN TUBE• Remove the (blue or red) clamp clip• Press down the tube coupling collet and pull the bowden tube out of the print headHEAT UP AND PREPARATION• Go to MAINTENANCE > ADVANCED > Heatup nozzle and set the temperature to 260 degrees• Cut off approximately 20 cm of filament with a straight cut and try to straighten the filament as much as possible• When the temperature is reached, insert the straightened piece of filament manually all the way down to the nozzle• Push it slightly until either the new filament comes out of the nozzle or until the filament can’t be pushed any furtherATOMIC METHOD