Additive Manufacturing worked example

Infill Time Impact at 14% infill travel allowance: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop infill travel allowance to 14%, then walk the calculation through step by step. Estimate print time tied to infill volume from infill extrusion amount, print rate, and infill travel allowance.

The inputs for this scenario

  • Infill extrusion amount: 210 g (held at the documented default)
  • Effective infill print rate: 3.5 g / min (held at the documented default)
  • Infill travel allowance: 14 % (the input this scenario stresses; the baseline uses 20)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base infill print time = infill extrusion amount รท effective print rate.
  • Adjusted infill print time works out to 68.4 hr at these inputs, and this is the headline figure for the scenario.
  • Base infill extrusion time works out to 60 hr at these inputs.
  • Travel/pattern allowance works out to 14 % at these inputs.
  • Effective infill print rate works out to 3.5 g / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where infill travel allowance sits at 20% and the headline result is 72 hr, this scenario comes in 5% below the baseline at 68.4 hr.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to infill travel allowance, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes a steady effective flow rate; in reality flow drops on small infill cells, sharp pattern direction changes, and cooling-limited sections, so dense lattices on small parts can take longer than this predicts.

Results at a glance

  • Adjusted infill print time: 68.4 hr (headline result)
  • Base infill extrusion time: 60 hr
  • Travel/pattern allowance: 14 %
  • Effective infill print rate: 3.5 g / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Infill Time Impact calculator, set infill travel allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.