Sensory Stepping Stone Assembly

Create a parametric CAD model of a low-profile sensory stepping stone, inspired by the attached reference image, for FDM 3D printing. Use millimeters. Create actual solid CAD geometry, not just a rendered image. Geometry: * Rounded hexagonal base, 220 mm across flats. * Total assembled height: 40 mm. * Broad, flat bottom and gently tapered sides. * Circular top standing surface, 180 mm in diameter. * Round all exposed edges with generous fillets, approximately 5 mm wherever feasible. * Avoid sharp corners, pointed spikes, and small detachable features. Construction: * Create the rigid main body and a separate flexible top pad as distinct parts. * Make the main body a closed solid volume so that the slicer can generate perimeter walls and internal infill. Do not create an unsupported hollow shell. * Recess the top surface to accommodate a 4 mm thick TPU pad. * Provide a nominal 0.3 mm clearance around the pad, exposed as an adjustable parameter. * The pad must be securely bonded over its full underside before use; do not rely on a loose friction fit. * Add a shallow underside recess for a broad, separately bonded non-slip sheet. Create three interchangeable CAD variants of the top pad: 1. Smooth surface. 2. Low, rounded parallel ribs. 3. Wide, rounded bumps. Keep texture relief at or below 2 mm, with smooth transitions and no pointed tips. Optimize each part for flat-on-bed printing with minimal supports. Keep each part within a 240 × 240 mm footprint. Expose the main dimensions, pad clearance, fillets, and texture dimensions as editable parameters. Export separate watertight STL files and STEP files if supported. Treat this as an unvalidated prototype. Do not claim a safe load capacity or child-safety certification. Identify any fit, strength, stability, and slip-resistance checks required before use.

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.