Moderate

Stringing

Thin threads of filament left behind during nozzle travel moves. Affects appearance but can be removed in post-processing.

Symptoms

  • Thin filament threads between printed parts
  • Filament strands along travel paths
  • Fine hair-like strands on surface
  • Especially noticeable when printing multiple parts

Main Causes

1. Insufficient Retraction Settings

Improper retraction distance or speed causes filament to ooze during travel moves, resulting in stringing.

2. Nozzle Temperature Too High

Excessive temperature reduces filament viscosity, making it more prone to dripping from the nozzle.

3. Slow Travel Speed

Slow nozzle movement gives more time for filament to ooze during travel, increasing stringing.

4. Filament Moisture Absorption

Moisture in filament creates steam when heated, contributing to stringing issues.

Solutions & Checkpoints

Optimize Retraction Settings

Adjust according to filament and printer type.

  • • Direct drive: 0.5-2mm
  • • Bowden tube: 4-8mm
  • • Retraction speed: 25-45mm/s
  • • Adjust gradually and test

Lower Nozzle Temperature

Start from the lower end of recommended temperature range.

  • • Decrease in 5°C increments and test
  • • Adjust within range that maintains layer adhesion
  • • Temperature tower tests are effective

Increase Travel Speed

Faster nozzle movement reduces stringing.

  • • Travel speed: 150-200mm/s
  • • Enable Z-hop if needed
  • • Use combing mode

Dry Filament

Especially important for hygroscopic materials like PETG and nylon.

  • • Dry with filament dryer (50-60°C, 4-6 hours)
  • • Store in sealed container with desiccant
  • • Use soon after opening

Adjust Slicer Settings

Use advanced slicer settings to reduce stringing.

  • • Set minimum travel distance
  • • Enable wipe feature
  • • Adjust coast settings

Post-Processing Methods

Methods to remove stringing after printing:

  • Lightly heat with heat gun (for low-temp materials like PLA)
  • Cut off with knife or nippers
  • Sand with sandpaper
  • Pull off by hand (for fine threads)