Pegas Dxf Rebuilder – User Guide

Table of Contents

1. Introduction

Pegas DXF Rebuilder is a professional utility that resolves the common issue where a dxf import curves not editable fusion 360 sketch cannot be modified. If you are struggling with how to edit imported DXF sketches or need to convert spline chains to native arcs for clean CNC profiling, this add-in simplifies your workflow.

It prevents issues where circular holes are imported as polylines that CNC routing programs reject, causing open profiles errors. It allows you to link hole diameters directly to user parameters, making it easy to change all hole sizes at once across your cabinet panel models.

2. Overview & Typical Workflow

Pegas DXF Rebuilder cleans, parametrizes, dimensioned, and exports DXF sketches — primarily optimized for CNC woodworking components with slots and holes.

Recommended Workflow
1. Import DXF file into Fusion 360
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2. Tab 1 — Rebuild (clean geometry and detect holes)
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3. Tab 4 — Gap Analyzer (detect and close open contours)
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4. Tab 2 — Parametrics (link slots/holes to parameters)
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5. Tab 3 — Dimensions (apply references or driving dimensions)
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6. Tab 5 — Export (DXF / SVG layer output)

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Import Rule

Always run Tab 1 (Rebuild) first. Parametrics operates on the newly rebuilt sketch (DXF_Rebuilt) rather than the raw imported DXF geometry.

3. Tab 1 — DXF Rebuilder

Cleans up an imported DXF sketch by detecting and replacing messy line chains with proper Fusion 360 geometry — closed circles, arcs, and straight lines.

DXF Rebuilder Tab Interface

Figure 1: DXF Rebuilder setup panel showing tolerances and geometry rebuild options (Click to zoom/pan)

How to Rebuild:

1. Select source sketch — Click Select to choose from your design browser, or click Active to use the currently open sketch.

2. Configure settings parameters (Tolerances and Circle detection).

3. Click Rebuild Sketch to construct clean geometric paths.

4. Tab 2 — Parametrics

Applies parametric dimensions and constraints to slots and holes so that modifying a single Thickness parameter resizes all linked features.

Parametrics Before Analysis

Figure 2: Parametrics setup with parameter Triples definition (Click to zoom/pan)

Parametrics After Analysis

Figure 3: Interactive list of detected slots and hole mappings (Click to zoom/pan)

Master Parameters — Triples

A Triple defines a material/tool combination. You can configure multiple triples for parts of different thicknesses on the same sheet.

  • Thickness: Target material thickness and parameter name (e.g., MaterialThickness).
  • Fit: Tolerance added to the slot width (Formula: Slot Width = Thickness + Fit).
  • Tool ⌀: Diameter of the cutting tool/end mill.
  • 🦴 Dogbone: Corner drill bit diameter. Set to 0 to disable dogbones.

5. Tab 3 — Dimensions

Automatically annotates and dimensions your sketch, bypassing manual dimensioning clicks on imported DXF geometry.

Dimensions Tab Interface

Figure 4: Dimensions tab options for auto-dimensioning boundaries, holes, and arcs (Click to zoom/pan)

6. Tab 4 — Gap Analyzer

Scans the sketch for open endpoints — where two segments should connect but are separated. Highlights errors in the viewport with red markers (open endpoints) and yellow lines (connections).

Gap Analyzer Tab Interface

Figure 5: Gap Analyzer interface for setting tolerance thresholds and auto-healing contours (Click to zoom/pan)

💡

Pre-check Contours

Always run Gap Analyzer if your rebuilt sketch fails to generate a closed profile for extrusion. Click Fix All Gaps to auto-heal open endpoints.

7. Tab 5 — DXF/SVG Export

Exports selected sketches to DXF and/or SVG vectors with clean separation of layers and parts.

DXF/SVG Export Tab Interface

Figure 6: Export panel options for path grouping (Flat, Part blocks) and target layer assignment (Click to zoom/pan)

8. Licensing & Activation

Pegas DXF Rebuilder comes with a 14-day fully functional trial. License activation is handled through the dedicated Pegas Account Manager utility:

1. Launch the Account Manager from the PEGAS toolbar tab in Fusion 360.

2. Enter your license key.

3. Click Activate to register your workspace.

9. Sketch Requirements for Parametrics

To ensure successful parametrisation (Tab 2), sketch geometry must satisfy the following layout requirements:

✅ Required Geometry
  • Rebuilt via Tab 1 (clean lines & arcs).
  • Rectangular slots: exactly 4 straight lines.
  • Rounded-end slots (fslot): 2 lines + 2 equal arcs.
  • Holes: Native SketchCircle entities.
❌ Blockers & Limits
  • Manually Fixed (pinned) constraints.
  • Conflicting manual dimensions on slot edges.
  • Partially merged or overlapping segments.
  • Open contours or gap loops.

10. Troubleshooting

Problem: Driving dimensions become reference (parenthesis)

The solver cannot apply driving values due to existing constraints. Click Scan fixes and select Remove fixes to release constraints before running parametrics.

Problem: Slot is not detected

Verify that the slot contour is fully closed (run Gap Analyzer). Ensure the slot has 4 clean lines or 2 lines + 2 arcs, and the width is under 40 mm.

Problem: Circles are not detected during rebuild

The source DXF circle is made of many tiny polygon segments. Increase the **Tolerance** parameter to `0.1` mm or `0.15` mm in Tab 1 and rebuild again.