3D Printing: Fixing Under-Extrusion

Under-extrusion manifests as 'mesh-like' walls, gaps between lines, or brittle parts.

1. Check for Clogs

Perform a 'Cold Pull' using a piece of nylon or PLA. If the tip comes out with black debris, your nozzle is clogged.

2. Extruder Tension

Check the spring-loaded arm on your extruder. If it's too loose, the gear will slip. If it's too tight, it will crush the filament.

3. Calibrate E-Steps

Ensure the printer is actually pushing 100mm when you ask for 100mm. See the 'E-Step Calibration' guide for details.

4. Nozzle Temperature

If you are printing too fast at too low a temperature, the filament won't melt fast enough. Try increasing your temp by 10C.