• [Oliver Pett] loves creating automata; pieces of art whose physicality and motion come together to deliver something unique. • [Oliver] also has a mission, and that mission is to complete the most complex automata he has ever attempted:The Archer. • This automaton is a fully articulated figure designed to draw arrows from a quiver, nock them in a bow, draw back, and fire - all with recognizable technique and believable motions. • Shoot for the moon, we say! • He’s documenting the process of creatingThe Archerin a series of videos, the latest of which dives deep into just how intricate and complex of a challenge it truly is as hedesigns the intricate cams required. • A digital, kinematic twin in Rhino 3D helps [Oliver] to choose key points and determine the cam profiles required to effect them smoothly.Insimple automatarotational movement can be converted by linkages to create the required motions.
Article Summaries:
- Oliver Pett is advancing his most ambitious automaton yet, “The Archer,” a fully articulated figure that can draw, nock, and fire arrows with realistic motion. To manage the project’s complexity, Pett has built a digital twin in CAD and uses the Grasshopper visual‑scripting add‑in for Rhino to mathematically generate precise cam paths. This approach lets him detect collisions and refine joint motions before machining, saving time and reducing material waste. Pett’s video series documents the design process, highlighting the challenges of coordinating multiple cams and the benefits of computer‑assisted planning. The project showcases how modern software can streamline the creation of intricate mechanical art.
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