Over-Extrusion

Also known as: Overextrusion

beginner Print Quality

When too much filament is extruded, causing blobs, rough surfaces, and dimensional issues.

Over-extrusion occurs when more filament than expected is extruded, resulting in bulging lines, blobs, and dimensional inaccuracies.

Symptoms

  • Bulging/raised lines
  • Rough, blobby surfaces
  • Dimensional inaccuracy (too big)
  • Layer stacking issues
  • Nozzle dragging through previous layers

Common Causes

  1. Flow rate too high
  2. Incorrect e-steps - Over-calibrated
  3. Filament diameter incorrect - Set smaller than actual
  4. Temperature too high - More fluid = more flow

Fixes

  • Calibrate e-steps properly
  • Reduce flow rate (try 95%)
  • Measure filament diameter
  • Lower temperature slightly
  • Check filament diameter in slicer