SpinStop

From English Sentence to 3D Part & G-code in 60 Seconds

Describe a bracket, bushing, spacer, or plate in millimetres. SpinStop generates an editable CADL recipe, builds watertight STL and STEP solids, slices to G-code, and simulates the toolpath in your browser.

Open 3D Designer → 60-Second Quick Start & Video Tutorial 2: Bushings & Brackets Tutorial 3: Enclosures, Gears & Sketches

The Designer is an alpha and requires a login with alpha access. Check every part before you print or cut it.

Design → Edit → Slice → Simulate

Four tools that hand off to each other, all in the browser.

1

Describe

Type plain English in mm. An AI model writes a readable CADL recipe and verifies the 3D geometry.

Open Designer →
2

Tweak CADL

Need a 5.5 mm hole instead of 4.5 mm? Edit one number in the CADL recipe and click Rebuild (no LLM) in seconds.

See how →
3

Slice & Convert

Inspect watertightness, convert file formats (.stl, .step, .obj, .3mf), and slice models to printable G-code.

Open Mesh & Slicer →
4

Simulate G-code

Scrub through every layer and toolpath move in 3D before you 3D-print or cut metal.

Open G-code Sim →

Watch the 90-Second Walkthrough

Recorded on the live site: prompt → PASS → change one number → slice → simulate. Then Tutorial 2's bushing and L-bracket.

Starter Examples

Paste a prompt into the Designer, or download the verified CADL, STL and STEP files. Tutorials 1 · 2 · 3.

Mounting plate 60x40x5 mm with four holes

Mounting Plate

Flat mounting plate 60x40x5 mm with four 4.5 mm through holes, 6 mm in from each edge at the corners
.cadl.stl.step
Tutorial 1 →
Flanged bushing

Flanged Bushing

Flanged bushing: 30 mm flange diameter, 4 mm flange thickness, 18 mm body outer diameter, 22 mm total height, with a 10 mm through bore and a 1 mm chamfer on the top edge
.cadl.stl.step
Tutorial 2A →
L-bracket with mounting holes

L-Bracket

L-bracket 50 mm wide, base leg 60 mm long and 6 mm thick, vertical wall 45 mm tall and 6 mm thick, with two 5 mm holes in the base and two 5 mm holes in the vertical wall
.cadl.stl.step
Tutorial 2B →
Project box before and after a wall and height tweak

Project Box

Rectangular electronics enclosure box 80x50x30 mm, 2.5 mm wall thickness, open on top, with 4 mm outer vertical corner fillets and two 3.5 mm mounting holes on the bottom floor
.cadl.stl.step
Tutorial 3A →
24-tooth spur gear with hub, before and after

Spur Gear

24-tooth spur gear, module 2 mm, 10 mm thick, with a 20 mm diameter x 16 mm tall center hub, an 8 mm through bore, and four 4 mm lightening holes on a 30 mm bolt circle
.cadl.stl.step
Tutorial 3B →
Dimensioned sketch of an L-shaped mounting bracket

From a Sketch

Make this bracket 6 mm thick with M5 clearance holes
sample_sketch_plate.png

Drop the drawing on the Designer's Optional sketch zone; a vision model reads the dimensions.

Tutorial 3C →

Advanced CNC — FeedWhiz Feeds & Speeds Calculator v0.10 beta

A free CNC feeds & speeds calculator that runs in your browser.

Run FeedWhiz Calculator →

Beta software: results may contain errors. Check feeds, speeds and tolerances before cutting. Data you save without logging in may be shared with other visitors.