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UM3 Extrudes during Active Leveling

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Posted · UM3 Extrudes during Active Leveling

During the Active leveling phase of the print, a few CM of filament is extruded and sticks to the nozzle like a plastic booger. So when the Bed touches the nozzle for active leveling two things happen:

  1. It causes incorrect bed leveling due to the extra material between the nozzle and the bed

  2. The nozzle clogs a bit, such that it does not extrude properly at the start of the print (The purge phase helps this a bit, but not always)

This started a week ago after I've been printing with TPU quite a bit. Any suggestions? 

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