Initial Layer Speed

First Layer Speed

Parameter: first_layer_speed
Unit: mm/s or %
Default: 50% or 20-30 mm/s
Description: Speed for the first layer of the print. Slower speeds give filament more time to bond with the bed surface.

First Layer Infill Speed

Parameter: first_layer_infill_speed
Unit: mm/s or %
Description: Speed specifically for first layer infill. Can be faster than perimeters since it's not touching the bed edge.

First Layer Travel Speed

Parameter: first_layer_travel_speed
Unit: mm/s
Default: Same as regular travel or slower
Description: Travel speed during the first layer. Slower travel reduces the chance of lifting freshly printed material.

Why First Layer Speed Matters

Adhesion: Slower speeds allow plastic to spread and bond better
Squish: More time for the nozzle to press filament into the bed
Accuracy: First layer sets the foundation for the entire print
Recovery: Slower speeds give more time to detect and fix issues

Recommended First Layer Speeds

Scenario	Speed	Notes
Quality prints	20-30 mm/s	Best adhesion
Standard prints	30-50 mm/s	Good balance
Fast prints	50-80 mm/s	Requires good bed prep
Bambu Lab printers	50-80 mm/s	Textured PEI handles faster
Glass bed	20-40 mm/s	Slower for better adhesion

Troubleshooting

Problem	Cause	Solution
First layer lifting	Speed too fast	Reduce to 20-30 mm/s
Poor adhesion on corners	Travel moves lifting	Reduce first layer travel speed
Elephant's foot	Speed too slow, over-squish	Increase speed slightly, check Z offset
Inconsistent first layer	Speed variations	Use fixed mm/s instead of %

Tip: A perfect first layer is the foundation of a successful print. It's worth taking extra time on the first layer to ensure the rest of the print succeeds.