FTC Dual-Stage Shooter Hood Assembly

Create a parametric, 3D-printable CAD model for a custom dual-stage robotics shooter hood designed for the FIRST Tech Challenge (FTC). The hood must handle two different sizes of game balls using an actuated mechanism. Please design the model around the following engineering specifications: 1. CORE ARCHITECTURE: - A rigid, modular outer mounting plate designed to attach to a standard FTC chassis or 1150-series channel system. - A secondary, inner articulating curved track (the hood surface) that can pivot or slide to dynamically change the shooter channel's depth. 2. DUAL-BALL COMPRESSION GEOMETRY: - The base channel width (inner curve to the launcher flywheel) must accommodate a [Insert Large Ball Diameter, e.g., 90mm] ball with roughly 3mm to 4mm of compression. - The mechanism must feature an actuated linkage or slider that pushes the inner track piece forward/inward to narrow the channel width, compressing a [Insert Small Ball Diameter, e.g., 50mm] ball by roughly 3mm against the same flywheel. 3. ACTUATION & MECHANICAL LINKAGE: - Include an integrated mounting bracket for a standard smart robot servo (such as a goBILDA or REV servo) equipped with a servo block. - Design a robust 4-bar linkage or a sliding rack-and-pinion assembly that connects the servo horn to the articulating inner hood piece, allowing a smooth, toggleable push-and-pull movement. - Provide a mechanical stop or lock-out point at both the fully retracted (large ball) and fully extended (small ball) states to prevent the servo from drawing stall current under high impacts. 4. 3D PRINTING OPTIMIZATION: - Ensure all parts feature flat indexing faces for optimal print bed orientation without requiring excessive support material. - Design walls with a minimum thickness of 4mm to withstand high-velocity ball impacts. - Use countersunk holes designed for standard M4 or #6-32 robotics hardware and hex nuts. Output the final design as a clean, manifold STEP file or an editable parametric model.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.