Pegas Dxf Rebuilder – User Guide

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Pegas DXF Rebuilder — User Guide

Version 1.0 · Autodesk Fusion 360 (Add-in) · Pegas Tools

🚀 Version v1.1.0 Dogbone V2📅 Last Updated: July 2026🛠️ Autodesk Fusion 360

Version 1.0 · Autodesk Fusion 360 (Add-in) · Pegas Tools

Table of Contents

  1. Introduction
  2. Overview & Typical Workflow
  3. Tab 1 — DXF Rebuilder
  4. Tab 2 — Parametrics
  5. Tab 3 — Dimensions
  6. Tab 4 — Gap Analyzer
  7. Tab 5 — DXF/SVG Export
  8. Tab 6 — Help
  9. Licensing & Activation
  10. Sketch Requirements for Parametrics
  11. Troubleshooting

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 sketch in fusion 360 or need to convert spline to arc fusion 360 for clean CNC profiling, this add-in simplifies your workflow.

If you are dealing with sketch gaps dxf import fusion 360 woodworking designers struggle with, or find you cannot edit imported dxf curves cnc routing programs refuse to run, this add-in is essential. It prevents issues where you get dxf circles imported as polylines plywood slots fabricators have to manually fix, causing an open sketch profiles error cnc toolpaths to fail.

It enables you to convert spline to arc fusion 360 woodworking operators use for smoother G-code, run a dxf sketch gap analyzer cnc plywood slots check, link hole diameters to user parameter cnc routing setups, and change all hole sizes at once fusion 360 cabinet panels require.

Key features include:
– Rebuilding “dead” imported DXF geometry into clean, editable lines, arcs, and circles.
– Resolving dxf import curves not editable fusion 360 issues by adding parameters and constraints.
– Resizing holes dynamically by allowing you to link hole diameters to user parameter settings, making it easy to change all hole sizes at once fusion 360.
– Automatically applying dimensions and constraints via auto constrain sketch fusion 360 algorithms.
– Exporting sketches to clean vector formats so you can save fusion 360 sketch as svg or export svg from sketch fusion 360 for laser cutting and CNC layout tools.

2. Overview & Typical Workflow

Pegas DXF Rebuilder is a Fusion 360 add-in for cleaning, parametrizing, dimensioning, and exporting DXF sketches — primarily for CNC woodworking parts with slots and holes.

Recommended workflow

Import DXF into Fusion 360
        ↓
  Tab 1 — Rebuild
  (clean geometry, detect holes)
        ↓
  Tab 4 — Gap Analyzer (optional)
  (check for open contours, fix if needed)
        ↓
  Tab 2 — Parametrics
  (configure triples → Analyze → Apply)
        ↓
  Tab 3 — Dimensions (optional)
  (add reference or driving dimensions)
        ↓
  Tab 5 — Export
  (DXF / SVG output)

Typical Import Rule

If you imported a DXF, always run Tab 1 (Rebuild) before Tab 2 (Parametrics). Parametrics works on the rebuilt sketch (DXF_Rebuilt by default), not the raw imported DXF. If you drew the sketch manually in Fusion 360, you can skip Tab 1 and go straight to Tab 2.

3. Tab 1 — DXF Rebuilder

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

How to use

  1. Select source sketch — Click Select… to pick from the list, or click Active to use the sketch currently open/selected in Fusion’s browser.
  2. Configure settings (see below).
  3. Click Rebuild Sketch.

A new sketch named DXF_Rebuilt (or the name you set) is created. The original sketch is kept visible by default.

Skip Rebuild on Native Sketches

Skip Rebuild if you drew the sketch manually in Fusion 360 — it is already clean geometry. Rebuild is only needed for sketches imported from external DXF files.

Settings Parameters

The following parameters control how the imported sketch geometry is rebuilt:

Parameter Type Default Range Description
Output name String DXF_Rebuilt Any valid name Name for the new rebuilt sketch in the model tree.
Tolerance (mm) Value Input (mm) 0.05 > 0 Maximum gap distance to close between segment endpoints.
Detect circles / holes Checkbox Checked Checked / Unchecked Detects circular chains and converts them to native SketchCircle objects.
Convert open curved chains to splines Checkbox Checked Checked / Unchecked Converts open arc-like polylines to splines for organic contours.
Keep source sketch visible Checkbox Checked Checked / Unchecked Original DXF sketch remains visible after rebuilding.
Copy construction lines as-is Checkbox Checked Checked / Unchecked Copies construction geometry from the source sketch.
Connect segments (coincident constraints) Checkbox Unchecked Checked / Unchecked Adds coincident constraints between connected endpoints. Adds ~50 seconds to rebuild time.

4. Tab 2 — Parametrics

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

How to use

  1. Select source sketch — Select the rebuilt sketch (e.g. DXF_Rebuilt).
  2. Configure Master Triples (see below).
  3. Click Analyze sketch.
  4. In the result panel, assign names and link each feature to a triple.
  5. Click Apply.

Master Parameters — Triples

A Triple is a set of parameters that define one material/tool combination. You can have multiple triples for designs with parts of different thicknesses.

┌─ TRIPLE 1 ──────────────────────────── [×] ┐
│  THICKNESS  [MaterialThickness]  [12]  mm   │
│  FIT        [Fit]                [0.2] mm   │
│  TOOL ⌀     [8] mm   🦴 DOGBONE  [0]  mm   │
└─────────────────────────────────────────────┘

The parameters of a Triple card are defined as follows:

Parameter Type Default Range Description
Thickness Value Input (mm) 12 > 0 Actual thickness value and parameter name (e.g. MaterialThickness) for the sheet material.
Fit Value Input (mm) 0.2 >= 0 Clearance added to the slot width (formula: slot width = Thickness + Fit) for fit tolerance.
Tool Diameter Value Input (mm) 8 > 0 Diameter of the end mill or cutter used to route the slots.
🦴 Dogbone Value Input (mm) 0 >= 0 Diameter of the drill bit for circular corner dogbones. Set to 0 to disable.

Fitting Formula

The final slot width is calculated as: slot width = Thickness + Fit.

Multiple triples

Click + Add triple to add a second set of parameters (e.g. for 18mm plywood on the same sheet as 12mm plywood). Each triple gets its own suffix: Thickness2, Fit2, etc.

Scan fixes

Click Scan fixes to detect features that were previously fixed (pinned) in the sketch by a prior parametrics run. A dialog appears offering to remove or ignore those fixes before re-applying.

5. Tab 3 — Dimensions

Annotates and parameters your sketch automatically, helping you add dimensions to imported dxf sketch files to avoid manual clicking.

How to use

  1. Select source sketch.
  2. Choose what to dimension (see below).
  3. Click Add Dimensions.

Dimensioning Parameters

The following parameters determine which annotations are added to the sketch:

Parameter Type Default Range Description
Overall size Checkbox Unchecked Checked / Unchecked Adds linear dimensions spanning the bounding box of the part.
Hole diameters Checkbox Unchecked Checked / Unchecked Adds diameter dimensions to all circular holes.
Arc radii Checkbox Unchecked Checked / Unchecked Adds radial dimensions to all arcs.
Hole positions Checkbox Unchecked Checked / Unchecked Adds X/Y positioning dimensions from the bottom-left bounding box corner to hole centers.
Driving dimensions Checkbox Unchecked Checked / Unchecked Creates editable driving dimensions instead of read-only reference dimensions.
Skip if over-constrained Checkbox Unchecked Checked / Unchecked Skips dimensioning if geometry has enough existing constraints to avoid errors.

6. Tab 4 — Gap Analyzer

Scans a sketch for open contour endpoints — places where two segments should meet but don’t. Highlights problems visually in the Fusion viewport with red dots (open endpoints) and yellow lines (gap connections).

How to use

  1. Select source sketch.
  2. Set Gap tolerance (mm) — maximum distance to consider as a gap (default 0.1 mm).
  3. Click Analyze Gaps.
  4. Review the results. Open endpoints appear as red markers in the viewport.
  5. Click Fix All Gaps to automatically snap open endpoints closed.

Pre-check Gaps

Run Gap Analyzer after Rebuild if you see self-intersecting or unclosed contours. Fix gaps before running Parametrics.

7. Tab 5 — DXF/SVG Export

Exports the selected sketch to a DXF and/or SVG file with full control over output structure and layers.

How to use

  1. Select source sketch.
  2. Set Export Folder (click Browse or type the path).
  3. Optionally set a Filename (leave blank to use the sketch name).
  4. Choose Grouping Mode.
  5. Configure Layers options.
  6. Select Output Format (DXF, SVG, or both).
  7. Click Export.

Grouping Modes

  • Flat: Each contour as a plain polyline. No blocks. Most compatible with older CAM software.
  • Contour blocks: Each closed contour exported as a separate DXF BLOCK.
  • Part as Block: Each detected part (outer outline + its slots and holes) exported as one BLOCK. Ideal for nesting.
  • Sketch as Block: Entire sketch as a single DXF BLOCK.

Export Layer Parameters

These parameters manage how contours are separated into layers during export:

Parameter Type Default Range Description
Circular holes String (Layer name) HOLES Any valid layer name Directs circular hole paths to a dedicated layer for drilling.
Rectangular cutouts String (Layer name) CUTOUTS Any valid layer name Directs rectangular slot paths to a dedicated layer.
Include construction lines String (Layer name) CONSTRUCTION Any valid layer name Exports construction lines on a separate layer.
Include projected geometry String (Layer name) PROJECTION Any valid layer name Exports projected curves on a separate layer.

Multi-Unit Support (mm/inches) in v1.1

Version 1.1 features full multi-unit support. The add-in automatically detects if your Fusion 360 document is set to millimeters or inches and scales the tolerances, spacing offsets, and UI dialog parameters accordingly. A units indicator is displayed in the window header.

Color-Coded Contour Export (v1.1)

In v1.1, the Export tab features an automatic contour classification and coloring panel. It analyzes your sketch geometry and groups elements into:
* Outer contour (default: Black #000000) — the outermost boundary of your part.
* Holes (default: Red #FF0000) — cutouts that go all the way through, containing no inner geometry.
* Cuts / Slots (default: Blue #0000FF) — pockets or slots containing inner geometry.

Ticking Use custom colors enables color pickers. Click the floppy disk icon (💾) next to a swatch to save it as the default. Reset to factory defaults using Reset colors.

8. Tab 6 — Help

Quick reference and diagnostics.
– Tab descriptions: Short overview of each tab’s purpose.
– Buy license: Opens the product page in your browser.
– Documentation: Opens the online documentation.
– Write verbose debug log: Enables detailed logging to debug/debug.log.

License Management Location

License management is handled by the separate Pegas Account Manager add-in (Pegas tab → Account Manager in Fusion 360), not from within DXF Rebuilder.

9. Licensing & Activation

Trial License

Pegas DXF Rebuilder includes a 14-day free trial with full functionality. No account or payment required to start the trial.

Activation

License activation is managed through the Pegas Account Manager add-in:
1. Install Pegas Account Manager from the Autodesk App Store.
2. In Fusion 360, go to the Pegas tab → Account Manager.
3. Enter your license key and click Activate.

10. Sketch Requirements for Parametrics

Before running Parametrics (Tab 2), your sketch must meet the following requirements.

✅ Required

  • The sketch must have been rebuilt with Tab 1 (DXF Rebuilder).
  • Each slot must be a clean closed contour with no gaps.
  • Rectangular slots (rslot) must consist of exactly 4 straight lines.
  • Rounded-end slots (fslot) must consist of exactly 2 straight lines + 2 arcs with equal radii.
  • Circular holes must be SketchCircle objects (not polyline arcs).

❌ Constraints Limits

  • Manually Fixed (pinned) geometry: solver cannot move it. Use Scan fixes to unlock.
  • Over-constrained slots: driving dimensions cannot be applied if conflicting constraints exist.
  • Manually applied dimensions on slot edges: conflicts with the new parametric dimensions.
  • Partially merged geometry: if a rectangular slot has 3 lines instead of 4, it is skipped.

Dogbone Drill Separation

The dogbone drill is a separate, smaller bit — different from the main slot end mill.

Alternative Tools & Cleanup

When evaluating dogbone plugin fusion 360 alternatives or searching for ways to perform deepnest dxf import cleanup before parametric modeling, Pegas DXF Rebuilder provides a comprehensive parametric reconstruction package that runs natively in your CAD viewport.

11. Troubleshooting

Parametrics: dimensions become reference

The sketch solver refused the driving dimension because the feature was already fully constrained. Click Scan fixes and choose Remove fixes before re-applying.

Parametrics: slot not detected

  • The contour is not closed — run Gap Analyzer (Tab 4).
  • The slot has the wrong number of segments — re-run Rebuild (Tab 1).
  • The slot is too small or too large — check that width ≤ 40 mm.

Rebuild: circles not detected

The original DXF circle is made of many short arc segments. Increase Tolerance slightly (e.g. 0.1 mm) and re-run Rebuild.

Debug log

To troubleshoot issues, a debug log can be generated:
– When the checkbox is disabled (default), logging is completely inactive.
– When the checkbox is enabled, the old log file is automatically erased, and a new detailed trace is recorded.
– The checkbox is temporary: restarting Fusion 360 automatically disables logging.
– How to use: Enable the checkbox, reproduce the issue, then copy debug/debug.log from the add-in folder and send it technical support.

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