TPU 3D Printing Guide

Thin strands of plastic appear between separate parts of the model, especially during travel moves.

Also searched as: stringing / hairy print / spider webs

The first layer will not bond to the build plate, or the whole print releases during the job.

Also searched as: first layer not sticking / not sticking to bed / filament dragging

The first layer is over-squished, rough, transparent, or scraped by the nozzle.

Also searched as: first layer too thin / nozzle scraping / transparent first layer

Printed lines look thin or incomplete, with gaps in walls, sparse top surfaces, or weak layers.

Also searched as: under extrusion / gaps / thin lines

Too much plastic is deposited, causing swollen lines, rough walls, blobs, and poor dimensional accuracy.

Also searched as: over extrusion / blobs / bulging lines

Filament stops extruding or comes out weakly even though the extruder is trying to feed.

Also searched as: clogged nozzle / clog / jammed nozzle

Upper layers suddenly shift in X or Y, creating a stepped print.

Also searched as: layer shift / shifted layers / print moved sideways

Molten filament leaks from the nozzle before printing or during pauses.

Also searched as: oozing / leaking nozzle / filament dripping

The visible surface looks uneven, scratched, bumpy, or inconsistent.

Also searched as: rough surface / bad surface finish / uneven walls

A vertical line of small blobs or marks appears where each layer starts and stops.

Also searched as: z seam / visible seam / vertical scar

The infill pattern is visible through outer walls or top surfaces.

Also searched as: infill showing / infill visible / walls too thin

The model bends, melts, sags, or changes shape during or after printing.

Also searched as: model deformation / deformed print / melted print

The print stops because the spool runs out, filament breaks, or the extruder can no longer feed material.

Also searched as: filament runout / filament broke / ran out of filament