Speed Profile

Per-feature print speeds — optimal speeds for perimeters, infill, bridges, overhangs, top surfaces, first layer, and travel moves.

What It Is

Speed profile defines different print speeds for different feature types. Perimeters benefit from slower speeds (surface quality), infill can go faster (hidden), bridges need specific speeds (too fast = broken, too slow = sag), and first layers need to be slow (adhesion).

What It Controls

Print time (fastest overall without sacrificing quality)
Surface quality (perimeter speed)
Overhang quality (overhang speed)
Bridge success rate (bridge speed)
First layer adhesion (first layer speed)
Infill strength and speed tradeoff

Feature Types

Feature	Typical Range	Priority
First layer	15-30 mm/s	Adhesion
Outer perimeter	30-60 mm/s	Surface quality
Inner perimeter	40-80 mm/s	Structural
Infill	60-150 mm/s	Speed
Top surface	20-40 mm/s	Surface quality
Bridges	20-40 mm/s	Span success
Overhangs	15-30 mm/s	Quality
Travel	150-300 mm/s	Speed (no extrusion)

Why It Varies

Filament max volumetric flow limits useful speed
Cooling capacity limits speed (faster = less cooling time)
Printer mechanical limits (acceleration, vibration)
Quality requirements differ per part and per feature

How to Calibrate (Manual)

Start with slicer defaults for the material
Print test objects focusing on specific features (overhang test, bridge test, etc.)
Increase/decrease speed per feature type based on results
Limited by max volumetric flow (speed × layer height × line width = mm³/s)

How the Auto-Tuner Calibrates It

Systematic test prints + camera/sensor evaluation per feature type
Tests multiple speeds per feature, evaluates quality
Builds optimal speed profile respecting volumetric flow limits
Can adapt during live tuning based on per-move feedback