Rhino 3D Tip: Convert Text to Curves for Reliable Fabrication

When preparing text for fabrication, convert it to reliable geometry first—explode the text and then create curves so what you see is exactly what gets cut, engraved, or printed.

• Why this matters
  • Eliminates font substitution issues when sharing files or exporting.
  • Preserves kerning, spacing, and exact letter shapes for CAM.
  • Prevents downstream apps from misreading annotations as editable text.
• Best-practice workflow
  • Keep an editable copy: Duplicate your text to a separate, locked “Editable_Text” layer before conversion.
  • Explode first: Select your annotations with SelText, then run Explode (or ExplodeBlock first if the text is inside blocks). This freezes formatting and breaks complex annotation objects into per-glyph entities.
  • Create outlines: If you need crisp letter outlines from scratch, use TextObject with Output=Curves, choose the exact font, set Height, and enable GroupOutput=Yes. Keep DeleteInput=No to preserve a reference.
  • Clean geometry: Use SelOpenCrv to catch any open loops, then Join. Run SimplifyCrv to reduce unnecessary control points while staying within tolerance.
• Fabrication tips
  • Laser/CNC cutting: Curves should be closed for profile cuts. For engraving, Offset with a small value to generate toolpaths or convert to polylines with Convert if the machine prefers them.
  • Stencils: Interior “islands” (e.g., in A, O, P, R) will fall out. Either use a stencil font or add bridges manually with Trim/Boolean operations.
  • 3D emboss/deboss: After outlines exist, Project or Pull them to the target surface, then ExtrudeCrv for solids or use OffsetSrf for embossed/debossed effects. For complex curvature, FlowAlongSrf can map text cleanly.
• Export settings that help
  • DXF/DWG: Choose an export scheme that keeps curves precise for your machine (splines vs. polylines). If available, enable “Export text as curves.” Verify units and tolerance.
  • STL: Text becomes part of the solid; ensure watertight joins after emboss/deboss. Check with ShowEdges and fix naked edges before export.
• Troubleshooting
  • Missing glyphs or odd shapes: Ensure you’re using a TrueType/OpenType font installed on the machine. If issues persist, use TextObject to rebuild outlines explicitly.
  • Overly dense outlines: SimplifyCrv or FitCrv to a small tolerance to reduce segments while maintaining shape.
  • Tiny text for cutting: Increase height so minimum stroke exceeds kerf and material constraints; micro-features can burn away or chatter.

Pro move: Keep the original annotation text (locked), a “curves” version for fabrication, and if needed a “meshed/solid” version for 3D workflows. Label layers clearly and use NamedSelections for quick re-exports.

Need the right Rhino toolset, plugins, or expert advice? Connect with NOVEDGE. Their team can help you choose the best setup for text-to-fabrication pipelines, and they offer competitive licensing and add-ons for Rhino workflows. For upgrades, bundles, and pro guidance, visit NOVEDGE.