My 3D print shows bubbles and bumps

My 3D print shows bubbles and bumps

How can you prevent and solve 'blobs and zits'?

• No retraction settings

  Does it seem like the 'blobs and zits' appear at the beginning of the print layer? Then you can easily solve this problem by adjusting the retraction settings under the heading 'retraction settings' in your slicer software. This setting determines the amount of filament extruded at the start of a new layer. If you have set your extraction distance to 1mm, lower it by entering -0.2mm in the restart settings. The extruder will now only extrude 0.8mm at the start of each print layer to prevent pimple formation.

• Adjust the coasting settings

  Does it seem like the bumps are at the end of the print layer? Then increase the 'coasting settings'. This setting ensures that the extruder stops just before the end, so that not too much filament is extruded. Increasing the coasting settings by 0.2-0.5mm is usually sufficient.

• Avoid unnecessary retractions

  Your retraction settings are to prevent oozing or stringing. However, if the nozzle does not have to bridge an open space, oozing will only take place on the inside of the object and will not affect the appearance of the object. Therefore, activate the 'only retract when crossing open spaces' function to avoid retraction while printing the outer layer.

If nothing else helps

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