Tip: If you're getting poor layer adhesion with PETG or ABS, try reducing fan speed. If you're getting droopy overhangs with PLA, try increasing fan speed.
Cooling Settings
Configure part cooling fan behavior for each filament material.
Enable Cooling Fan
- Parameter
cooling- Type
- Boolean
- Default
- Enabled
- Description
- Master switch for part cooling. When disabled, all fan control is turned off.
Min Fan Speed
- Parameter
min_fan_speed- Unit
- Percentage (%)
- Range
- 0 - 100%
- Description
- Minimum fan speed used during printing. Fan won't go below this when active.
Max Fan Speed
- Parameter
max_fan_speed- Unit
- Percentage (%)
- Range
- 0 - 100%
- Description
- Maximum fan speed used during printing. Used for overhangs, bridges, and small layers.
Disable Fan for First N Layers
- Parameter
disable_fan_first_layers- Unit
- Layers
- Default
- 1
- Description
- Number of initial layers to print without any fan cooling. Helps with bed adhesion.
Full Fan Speed at Layer
- Parameter
full_fan_speed_layer- Unit
- Layer number
- Default
- 3
- Description
- Layer at which fan ramps up to full speed. Fan gradually increases from layer 1 to this layer.
Slow Down for Better Layer Cooling
- Parameter
slowdown_below_layer_time- Unit
- Seconds
- Default
- 5-15 seconds
- Description
- If a layer prints faster than this time, speed is reduced to allow proper cooling.
Min Print Speed
- Parameter
min_print_speed- Unit
- mm/s
- Default
- 10 mm/s
- Description
- Minimum speed when slowing down for cooling. Printer won't go slower than this.
Recommended Cooling Settings by Material
| Material | Min Fan | Max Fan | First Layers Off | Notes |
|---|---|---|---|---|
| PLA | 80% | 100% | 1 | Maximum cooling for best quality |
| PLA+ (HS) | 70% | 100% | 1 | High cooling for fast printing |
| PETG | 30% | 60% | 3 | Too much fan causes poor layer adhesion |
| ABS | 0% | 30% | 5+ | Minimal fan, use enclosed chamber |
| ASA | 0% | 30% | 5+ | Similar to ABS |
| TPU | 30% | 50% | 2 | Moderate cooling |
| Nylon | 0% | 30% | 5+ | Low cooling for adhesion |
| PC | 0% | 20% | 10+ | Very minimal cooling |
Overhang Fan Speed
- Parameter
overhang_fan_speed- Description
- Fan speed specifically for overhang regions. Can be set higher than max fan speed.
Bridge Fan Speed
- Parameter
bridge_fan_speed- Default
- 100%
- Description
- Fan speed during bridging. Usually set to maximum for better bridge quality.