01 / METHOD
How to use this extrusion flow tool
- Enter line width, layer height, and print speed.
- Choose a bead model: simple rectangle or rounded-edge approximation.
- Set filament diameter and density for feed and mass rates.
02 / APPLICATIONS
When it is useful
- Check whether a speed profile exceeds hotend capacity
- Convert volumetric flow to filament feed
- Compare extrusion demand between profiles
03 / MODEL
Assumptions and limitations
Assumptions
- Speed is constant for the reported instant.
- Extrusion is continuous and filament does not slip.
- The selected bead model approximates the deposited cross-section.
Limitations
- Acceleration, cornering, melt temperature, back pressure, die swell, and extruder grip are not predicted.
- A computed demand below a published limit does not guarantee print quality. Test the exact material.
04 / FAQ
Common questions
What is volumetric flow?
It is the volume of plastic requested per second, calculated as deposited cross-sectional area times toolhead speed.
Which bead model should I use?
Rectangle is a conservative simple estimate. Rounded-edge uses a rectangle plus semicircular ends and is closer to common slicer geometry.
Is this the slicer flow percentage?
No. This reports physical flow in mm³/s, not an extrusion multiplier.