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IsoCurve

In one sentence: Extracts iso-parameter curves from a face — lines of constant U or constant V — useful as guide rails or for inspecting surface quality.

Third-party addon — installation required

The Curves workbench is not included in FreeCAD. Install it via Tools → Addon Manager → search "Curves" → Install and restart FreeCAD.

Overview

Workbench: Curves
Menu: Surfaces → IsoCurve
Command: IsoCurve

An iso-curve is a curve on a surface at a constant U or constant V parameter value. Multiple iso-curves can be extracted simultaneously.

Parameters

Parameter Description
Direction U or V iso-curves
Number of curves How many iso-curves to create
Parameter value Single specific parameter to extract one iso-curve

Common uses

  • Guide rails for a sweep
  • Visual aids for inspecting surface quality
  • Input curves for a Gordon surface

See also