Parametric CAD / Windows

Draw it once.
Own it forever.

Parts, assemblies, drawings, schematics and architecture in one program.

Product
WrenCAD
Status
In development
Kernel
OpenCASCADE
Platform
Windows
License
Perpetual, per seat
Activation
Offline
banner_01_modelled.png
01 Modeled Sketch, constrain, build the feature tree
banner_02_assembled.png
02 Assembled Mate it into the machine it belongs to
banner_03_documented.png
03 Documented Flat pattern and exploded view on one sheet

Drag sideways

What this is

WrenCAD is parametric CAD software you can buy once and use forever. You sketch, you constrain, and you get full parts, assemblies, drawings, schematics and architecture that all live in the same program.

I built WrenCAD because the tools available either cost a subscription forever or don't have all the features you want.

It is not finished, and it is not for sale yet. Check out the roadmap to see my plans for release. Leave your email and you will hear from me once, when there is something to download.

Sheet index

What it covers

Document types

Across every document

A1 Parts

Sketch on a plane, constrain it until it stops moving, then build features on top. The tree keeps every step, so changing a dimension near the bottom rebuilds everything above it.

  • Full sketch relations and constraint solving
  • Feature history you can reorder and roll back
  • Reference geometry, planes and axes
  • Rebuild driven from any dimension in the tree
cell_a1_parts.png

A2 Assemblies

Bring parts together, mate them, and nest sub-assemblies as deep as you need. Parameters can be overridden per instance without touching the file they came from.

  • Mates and sub-assemblies
  • Exploded views that carry into drawings
  • Instance-local parameter overrides
  • BOM in two modes, parts only or parts with hardware
cell_a2_assemblies.png

A3 Drawings

Bring in parts or assemblies. Views stay linked to the model and update when it changes.

  • Orthographic, section, detail and auxiliary views
  • Editable title block templates
  • BOM tables driven from the assembly
  • Flat patterns and exploded views on the same sheet
  • DXF and PDF out
cell_a3_drawings.png

A4 Schematics

Electrical schematic capture in the same program as the mechanical work, with a solver running live as you draw.

  • Schematic capture with a live solver
  • Component libraries shared with the mechanical side
  • Wire numbering and terminal lists
  • Prints to the same drawing sheets as everything else
cell_a4_schematics.png

A5 Architecture

Walls, floors and roofs are parametric objects, not geometry with a thickness typed into a box. You define the layer stack and the thickness falls out of it.

  • Composition-aware walls, floors and roofs
  • Thickness computed from the layer stack
  • Framing saved as reusable style objects
  • Room auto-detection plus user-defined zones
  • IFC export
cell_a5_architecture.png

B1 Sheet metal

Full sheet metal capabilities. Including custom bend math, flattening curved parts, and flat pattern output.

  • Flat pattern with bend allowance and bend lines
  • Material and thickness driven from the part
  • DXF out for the punch and the laser
  • Folded and flat states in the same file
cell_b1_sheet_metal.png

B2 Equations

Dimensions can be driven by expressions instead of numbers, anywhere in the program. Design intent stays in the file rather than in your head or a spreadsheet on the side.

  • Equation driven features and sketches
  • Named parameters referenced across the document
  • Works in parts, assemblies and architecture alike
cell_b2_equations.png

B3 Component libraries

Standard stock and hardware kept in libraries you can add to, so the things you use a lot are a drop away rather than a remodel.

  • Fasteners and standard stock included
  • Add your own components to any library
  • Shared between mechanical and electrical work
cell_b3_libraries.png

C1 Hardware on the part

The shop gets a part list and purchasing gets a fastener count, off the same file, with a toggle.

It works because hardware lives on the part rather than the assembly. Add an entry to the hole library and the PEM nut or standoff that belongs in it comes along with the hole. Which is how pressed-in hardware actually behaves.

  • Hole library entries carry their hardware
  • No assembly needed to express the relationship
  • BOM toggles between part based and full
cell_c1_hardware.png

C2 Ladder logic

Rung editing for control work, sitting in the same program as the parts and the schematics rather than in a separate tool with its own file format.

  • Rung editing for control work
  • Lives alongside the schematic it belongs to
  • Documented on the same drawing sheets as the schematic
cell_c2_ladder.png

C3 Exchange

Standard formats in, standard formats out. DXF for the punch and the laser, STEP for anyone sending you something in 3D.

  • DXF and STEP in and out
  • PDF out for drawing sheets
  • OBJ, FBX and glTF for visualization
  • IFC out of architecture documents
cell_c3_exchange.png

Formats and workflow

It speaks what your shop already uses

  • DXF in and out for the punch and the laser. STEP for anyone sending you SolidWorks or Fusion files.
  • Native files are plain JSON. Open one in Notepad and read it.
  • The full format specification will ship inside the install folder.
  • If you have used SolidWorks, you already know where everything is. Same sketch relations, same feature tree.
  • One installer, no account, no sign-in. It runs on a shop floor PC with no internet.

bracket_a.wrnp

"units": "mm",
"features": [
  { "type": "sketch""plane": "XY" },
  { "type": "extrude", "depth": 3.0 },
  { "type": "bend",    "angle": 90.0 }
]

Intended pricing

Planned pricing

Nothing is for sale yet. This is what it is intended to cost when it is ready, put here so you know what you would be signing up for.

Demo

Free

No account, no time limit

  • Every part modeling tool
  • Writes the native format
  • DXF and STEP export
  • Parts only, no assemblies or drawings

Full license

$249

One time, per seat.

  • Everything in the demo
  • Assemblies and drawings
  • Schematics, ladder logic and architecture
  • Offline activation, yours permanently

Revisions

What is being built

This updates as things land. No dates until something actually has one.

RevDescriptionStatus
APart modeling and sketch solverBuilding
BDrawing views and dimensioningBuilding
CSheet metal flat pattern exportNext
DAssembly mates and BOM modesNext
EArchitecture walls, floors and roofsPlanned
FSchematic capture and ladder logicPlanned
GConfigurations and design tablesPlanned