Moderate

Sagging & Overhangs

Drooping of unsupported areas and surface sagging. Balance of cooling and temperature is key.

Symptoms

  • Overhang areas drooping
  • Bridge sections sagging
  • Filament oozing on surface
  • Rough finish on bottom surfaces

Main Causes

1. Nozzle Temperature Too High

Excessive temperature reduces filament viscosity, making it prone to drooping under gravity.

2. Insufficient Cooling

Weak part cooling allows filament to droop before solidifying.

3. Print Speed Too Fast

Excessive speed on overhangs causes filament to move to next layer before stabilizing.

4. Improper Support Settings

Missing supports for angles that need them, or insufficient support density.

Solutions & Checkpoints

Adjust Nozzle Temperature

Approach lower end of recommended temperature range.

  • • Decrease in 5°C increments and test
  • • Adjust within range that maintains layer adhesion
  • • Can lower temperature for overhang areas only

Increase Fan Speed

Enhance cooling to solidify filament quickly.

  • • 100% fan for overhang areas
  • • Maximize fan for bridge settings
  • • Be cautious with ABS/ASA (risk of delamination)

Adjust Print Speed

Slow down for overhang areas.

  • • Overhang speed: 20-30mm/s
  • • Bridge speed: 25-35mm/s
  • • About 50-70% of normal speed

Optimize Support Settings

Prevent drooping with appropriate supports.

  • • Support angle: 45-50 degrees and above
  • • Support density: 15-20%
  • • Use tree supports
  • • Adjust support contact distance

Change Model Orientation

If possible, orient to minimize overhangs.

  • • Avoid overhangs above 45 degrees
  • • Consider orientation with fewer supports
  • • Balance strength and finish quality

Overhang Angle Guidelines

0-45°

No support needed, good finish

45-60°

Manageable with enhanced cooling

60-75°

Support recommended

75°+

Support required