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Blender Addon: Bezier Curve CAD Tools for CNC Milling & Laser Cutting

Home Page: https://blenderartists.org/forum/showthread.php?447039-Addon-Bezier-Curve-CAD-Tools-for-CNC-Milling-amp-Laser-Cutting

License: GNU General Public License v3.0

Python 100.00%
blender3d blender-addon bezier-curves svg gcode toolpath cad

curve_cad's Introduction

Features

Context Menu > Bezier CAD

Fillet

Select spline points to round them by inserting arcs or chamfers. Only works on corners between straight lines with handle type "vector".

Boolean

Select exactly two bezier splines to combine their area into a new one by union, intersection or difference. For the difference mode the order of selection matters. The active spline can be defined by deselecting and selecting one vertex again.

Intersection

Select at least two segments to split them at their intersections.

Handle Projection

Adds the point, where the two rays a segments handles form come closest to each other, to the selected segment. This can be used to undo a fillet and thus sharpen a rounded corner.

Merge Ends

Merges the end control points of the selected splines while preserving the relative positions of their handles.

Subdivide

Blender only allows for uniform subdivision. This operator enables you to select multiple segments and split them at custom parameters simultaneously.

Array

Blenders array modifier only works on the resulting mesh not on the curves themselves. This operator enables you to select splines in edit mode to duplicate, shift and connect them.

Circle

Sets the 3D cursor to the center of the circle formed by the selected segment.

Length

Measures the arc length of the selected bezier segments.

Add > Toolpath

Offset Curve

Creates a toolpath with a defined offset to the selected splines.

Slice Mesh

Works like the loop cut tool but it is based on the geometry not the topology. Use the 3D cursor to define the pivot and orientation of the slice planes.

Dog Bone

Adds overshoot for milling corners so that a sharp polygon fits inside an otherwise rounded corner. What counts as inside and outside can be flipped by switching the direction of a spline.

Discretize Curve

Converts a bezier spline to a polygon spline. It is adaptive by inserting more vertices where more curvature occurs.

Truncate

Add an "empty" of type "cube" and transform it to your wishes. Select some curve objects and the empty cube last so that it becomes the active object. Now, apply the truncate operator to cutoff all the polygon splines inside the curves at the empty cubes boundaries. Optionally, movements to the top of the volume (Z-hops) can be added.

Rect Macro

Creates a toolpath for a rectangular area.

Drill Macro

Creates a toolpath for a circular hole.

File > Export

SVG (for Laser Cutting)

  • Fills and Colors
  • Selection Only / All Visible
  • Viewport Projection / Local Orthographic Projection
  • Absolute / Relative Coords
  • SVG Path: Move To, Line To, Curve To, Close
  • Units

G-Code (for CNC Milling)

Exports the active curve. It must contain exactly one spline / polygon which must be non cyclic.

  • Feed Rate: The "softbody goal weight" is used to encode this information per vertex
  • Seek: Fast movement
  • Line: Slow movement while cutting
  • Circle: Reconstructed from bezier curves

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