Wet Pilot R0.

Research record

The detail behind
the study.

Source-linked work for this revision. Reported checks describe the stated model or test; physical qualification and applicability to the current retrofit remain separate.

Subfield wet-service pilots — R0 CONCEPT

Two new parametric assemblies extend the existing Core pilot: screen housing/retention (seven parts) and wet carrier/cassette (three parts). The shared access skeleton reserves independent extraction lanes, a stationary Hub and separate pump-out access.

- screen/SC-025-026-SCREEN-R0-CONCEPT.blend: assembled, captured, exploded, section and Service motion scenes. - carrier/SC-014-027-CARRIER-R0-CONCEPT.blend: assembled, exploded, cassette removed and Service motion scenes. - Select Service motion in Blender and play the timeline to inspect the idealized sequence. Matching GLBs contain one coordinated animation each. - WET-ACCESS-SKELETON-R0-CONCEPT.blend: provisional shared opening and layout context. - Each assembly's step/ folder contains separate parts and assembly states; print/ contains full-scale fit-study STL/3MF; views/ contains PNG views and projected SVG drawings. - panel-alternative-envelope.step and screen-envelope-comparison.json compare packaging only, without selecting a filtration shape.

These are concept studies with assumed dimensions, not released or functional products. Sleeve actuation/coupling, liquid sealing, actual screen/media selection, hydraulics, wet loads, positive carrier retention, manufacturing and physical fit remain unqualified. The access skeleton is not a tank design. Large fit-print parts may exceed desktop printer beds.

All changes are local on branch cad/core-concept-r0; nothing was committed or pushed. The companion subfield-cad-source-pilots-r0.zip contains the updated Core and wet-pilot sources with the locked toolchain.

Use --out to build another output folder. --parameters accepts a separately versioned study file. Preserve source and parameter hashes before revisions. Renderer input/output paths must match the generated folder. Blender produces still views, an editable scene file, and an animated GLB; it does not replace the CAD master.

Seven separate bodies: stationary housing cage, cartridge support cage, keyed head/handle, swing retainer, pivot proxy, sliding containment sleeve and flat seal study. Large support-cage apertures are not a selected screen opening; the SC-024 element is unresolved and has not been silently designed as printable filter material.

Idealized service sequence: assembled → raise sleeve (captured) → rotate retainer (unlocked) → lift the contained package (withdrawn). captured means geometric enclosure, not a demonstrated liquid seal. There is no implemented head-to-sleeve coupling, sleeve actuation from grade, supplier fluid connection, hydraulic isolation or bypass barrier. Those remain blocking inputs for a functional screen. The rotating bar blocks a 5 mm head lift in the locked study and clears in the released study. The asymmetric key rejects the 180-degree reversed head in nominal geometry; other errors, wear and contamination require qualification.

The sleeve is below the cartridge during operation and is raised before withdrawal. Its long parked envelope is intentional and may make this candidate impractical at real depths. The separate panel-envelope STEP and comparison JSON expose a second packaging candidate. Gross face areas omit supports/open fraction and cannot compare actual capture or pressure loss. No cylindrical or panel production selection is made.

Wet carrier and representative media cassette

Three separate bodies: fixed twin-rail ladder, moving carrier frame and one representative empty cassette. Narrow rung tabs run through the guide mouths. Closed guide bushings would be trapped by the rungs; the open-back profile is shared with the rail definition in wet_interfaces.py.

The cassette can lift independently; the carrier can also leave the fixed backbone. The frame is a concept geometry grouping, not a selected one-piece manufacturing process. Replaceable liner details, positive retention and actual lifting interfaces remain unresolved. The orange cage is a support envelope, not a treatment medium or proof of biological capacity. Distributor/collector connections are intentionally unselected; no pipe or cable can be inferred to disappear during service.

Wet-local Z is vertical. Explicit transforms place each model in a common skeleton; this does not alter Core's wall-local axes. A provisional 800 × 560 mm service opening at a 900 mm grade plane supports two conservative vertical lanes with 30 mm clearance allowances. A separate pump-out opening and stationary Hub reserve are context geometry. No actual vessel, structural roof, chamber volume or additional tank penetration is created by this skeleton.

The checks cover valid single solids, pairwise nominal-state intersections, reversed-key interference, retention blocking, sampled retainer rotation, sleeve rise and extraction, carrier/cassette retrieval, full-translation XY lane bounds, Hub reserve clearance, and STEP/print export integrity. Lane bounds conservatively cover pure vertical movement. Mechanism collision sampling is finite; it is not continuous swept collision or hand/cable/reach evidence. The default suite also exercises wrong lanes, oversized rung tabs, invalid parameters and release-status rejection.

All numeric geometry is a study assumption. Feature-local constants in the source are included in this status. Materials, loads, tolerances, fouling, service containment, hydraulic behavior, operator reach and treatment recovery are unqualified. Full-height rail/sleeve files can exceed desktop print beds; use the individual 3MF dimensions and slicer review, never silently scale mating parts. Fit prints are nonenergized only.