Glossary · Slicer

Ironing Inset

A distance that keeps the ironing toolpath away from the outer contour to reduce edge smearing.

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Illustration for Ironing Inset

Ironing Inset offsets the ironing path inward from the outer perimeter. It helps prevent excess material from being pushed over the edge while still smoothing most of the visible top surface.

How do you recognize it?

  • Cleaner outer edges when set appropriately
  • Swollen or fuzzy edges when the inset is too small
  • A visible non-ironed border when the inset is too large

Common causes

  • Edge smearing during ironing
  • Aggressive ironing flow too close to the perimeter

What should you check first?

  1. Inspect the outer contour after an ironing test.
  2. Tune inset together with ironing flow.
  3. Avoid maximizing inset blindly.