AQUASENSE Modular Optical Testing Enclosure

Design a modular 3D-printable optical testing enclosure (AQUASENSE) for water-quality colour testing. Units: mm. FDM printable, assembled by hand. ENCLOSURE: 100 x 35 x 70, wall 2.5. Parts: base, removable top cover (light-tight), tube support ring, lower tube support, TCS34725 holder + sliding carriage, LED holder + sliding carriage, rails/guides, locking screws, connectors (tabs, slots, screws and nuts; snap-fit only if strong enough). TEST TUBE: dia 23, length 150, vertical through the centre, may extend above/below the enclosure. Circular top opening with fitting clearance (never smaller than 23). Removable support ring around the tube. The tube has a round (U-shaped, hemispherical) bottom, so the lower support recess must be a smooth concave bowl (not flat), sized to the rounded bottom plus clearance, so the tube sits snug, centred and vertical. TCS34725 HOLDER: module 30 x 30, pocket for the PCB with clearance for edges and solder joints, open window for the sensing area, sensing face pointing at the tube. Slides on a linear rail at 0, 10, 20, 30 mm from the tube, with locking screw, end stops, removable. LED HOLDER: on the opposite side of the tube, facing the tube and sensor, LED front 5 thick x 9 high (rest of body and wire space configurable). Holds the LED against moving or rotating, optical path unobstructed. Own rail, same 0, 10, 20, 30 mm positions, locking screw, end stops, removable. SLIDERS: TCS and LED adjust independently, controlled from outside the closed enclosure, with readable external markings at 0, 10, 20, 30 mm. Sliding clearance 0.3-0.5 mm per side. First check that holders, 30 mm travel and tube position fit in the 100 mm length; if not, propose the closest revised layout. No overlapping or impossible geometry. Cover and walls must not block the LED-tube-sensor light path. PRINTING: wall 2-3 mm, minimal supports, flat print faces, no fragile clips, easy to disassemble. OUTPUT: Every part is its own separate solid. Do NOT fuse or join parts. NO exploded view. Create one print plate: all printed parts separate and flat at Z=0 in print orientation (base floor down and open top up, cover outer face down, other parts on their largest flat face), nothing overlapping or touching, 10 mm gaps, within 220 x 220 mm, true size, minimal supports (if they do not fit, use multiple plates). No test tube, sensor, LED or screws on the plate. Export the plate as one STL (3MF if possible), each part as STL (in mm), and STEP. Each STL must be watertight. Return a valid JSON object with keys title, param_schema, script.

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.