Structure
Components and instances
Components nest, carry their own origin and own their features. Place a definition again without copying it; make one unique when it has to differ.
Assemblies & motion
Put it together. Then make it move.
Components that own their features, joints picked on real faces and edges, and mechanisms driven by motors — with charts, traces and clash detection while it runs.
Joints
Seven kinds, picked on geometry
Rigid, revolute, slider, cylindrical, pin-slot, planar and ball — placed on a face, an axis, a circular edge or a corner, with limits and grounded parts.
Mechanisms
Links that transmit motion
Gear, belt, rack and screw ratios, and cams that follow the real profile of the cam you modelled.
Studies
Motors and playback
Drive a joint at a rate, play, scrub and loop. The sampler computes where every part stands at every frame.
Evidence
Charts, traces, clashes
Plot any joint value, trace a point's path, see collisions as they happen, and export the numbers as CSV.
Share
Video and animated glTF
Record the study to video, or export an animated glTF that plays in any viewer.
Structure
Hundreds of parts, still easy to find.
The engine is 71 components on 89 joints, with 13 motion links and 14 motion studies — from a one-degree check of a single cylinder to two full turns of all five. The browser keeps it navigable.
Clearance
Find the clash before the workshop does.
Interference and clearance analyses live in the browser beside your bodies. The e-bike below carries eighteen of them — tyre to mudguard, chain to frame, brake to disc — re-checked on every change.
Add a joint, step by step
Put your mechanism through its paces.
Import a STEP file, push a face, put a dimension on it. 5 days, every tool, nothing to pay until you decide.