What this tool calculates
Convert a cooled filament diameter and linear haul-off speed into the mass rate that reaches the winder.
Formula and method
When to use it
Use this to compare a measured line speed with expected mass output, estimate run time, or spot a mismatch between weighed output and nominal diameter.
Worked example
At 1.75 mm, 1.24 g/cm³, and 2 m/min, the theoretical output is about 5.97 g/min or 0.358 kg/h. One kilogram takes about 2.79 hours at that steady rate.
Assumptions and limitations
The strand is solid, round, at the entered cooled diameter, and the line speed is steady. Density is for the finished blend. Die swell, voids, moisture bubbles, changing diameter, startup losses, and downtime make real output differ. Compare with a timed weigh test.
Common mistake
Do not use hot die-exit diameter; the mass-rate calculation belongs to the cooled filament that will be accepted and wound.