Castle keep box — a fortified keep that opens at the wall-walk

Über dieses Modell

A fortified keep, **112.2 × 112.2 × 120.5 mm**, that **opens at the wall-walk**. Lift the battlements, the four corner drums and their tiled conical roofs off in one piece, and what is left is a box with a **70 × 70 × 64 mm** cavity.  Six STLs, **two prints**, and nothing to assemble — no screws, no magnets, no glue, no elastic, no bearings. The colours are coordinate-locked solids the slicer prints as one object, and the lid simply lifts off.  70 × 70 × 64 mm is a fistful of dice, a sleeved deck, keys and coins by the door, a watch, or a gift you would rather not wrap. > **The lid rests — it does not latch.** The tongue locates it precisely and it sits flush without rocking, but nothing grips it: tilt the keep and the lid comes off. This is a **box that lives on a table or a shelf**, not one to carry in a bag. If you need it to travel, glue a pair of Ø5 × 3 mm magnets into the tongue and the groove, or pack it lid-up. ## Materials - **Filament:** PLA, ≈**183 g** for both prints at 0.2 mm / 3 walls / 15 % infill — 102 g for the base, 80 g for the lid, under 3 g for every accent combined. Four colours: stone grey, tile red, dark brown, gold. Single-filament builders use ≈150 g. - **Non-printed parts: none.** No screws, magnets, glue, elastic or bearings. Every locating feature is printed. - **Tools: none.** A deburring blade is handy for the tongue if the lid ends up snug, nothing more. ## The six parts  | STL | print | filament | what it is | |---|---|---|---| | `castle_base_stone.stl` | A | stone grey | the keep below the wall-walk — battered plinth, curtain wall, four round drums, projecting gatehouse, locating tongue | | `castle_base_dark.stl` | A | dark brown | 34 arrow-loop backings + the planked gate, all seated at the **back** of their pockets | | `castle_base_gold.stl` | A | gold | the escutcheon over the gate | | `castle_lid_stone.stl` | B | stone grey | wall-walk, battlements, parapet, tower drums and eaves | | `castle_lid_roof.stl` | B | tile red | the four conical roofs | | `castle_lid_gold.stl` | B | gold | the four finials | ## Step 1 — slice print A, the base 1. **Import `castle_base_stone.stl`, `castle_base_dark.stl` and `castle_base_gold.stl` together.** 2. Bambu asks *"load as a single object with multiple parts?"* — answer **Yes**. They arrive coordinate-locked; do not move them relative to each other. 3. Assign a filament per part: **stone grey**, **dark brown**, **gold**.  > **Never merge these into one file and use "Split to Parts."** It divides by connected component and ignores solid names — `castle_base_dark.stl` is **35 separate shells** (34 arrow loops and the gate), so you would get 35 parts to colour by hand instead of 3. ## Step 2 — slice print B, the lid Same again with `castle_lid_stone.stl`, `castle_lid_roof.stl`, `castle_lid_gold.stl` → **stone grey**, **tile red**, **gold**.  The colour boundaries here are *touching* faces, not overlaps: each cone sits on the flat top of its eave, 0.8 mm inside the lip, so a stone rim shows all round under the red. ## Step 3 — one colour, if you prefer Print just `castle_base_stone.stl` and `castle_lid_stone.stl` and skip the rest. Every accent is a **pocket** that its plug fills from behind, so without the plugs you still get the whole design as crisp engraving: 1.8 mm deep arrow loops, a 3.4 mm gate passage, a recessed escutcheon. ≈150 g sliced for the pair. ## Step 4 — print **Do not rotate either half.** The base stands on its battered plinth; the lid's flat deck underside is already its lowest face, so it lands on the bed with the roofs pointing up. The cones are 32° off vertical and self-support, and every tile course is *cut* into the cone rather than stacked on it. | | Base | Lid | |---|---|---| | Footprint | 108.2 × 108.2 mm | 112.2 × 112.2 mm | | Height | 72 mm | 52.5 mm | | Orientation | **exactly as exported** | **exactly as exported** | | Supports | **none** | **none** | - 0.2 mm layers, 1.2 mm walls or more. The thinnest stone anywhere is **1.8 mm** (behind an arrow loop); the curtain is 3.6 mm. - Two lid features bridge, both deliberately narrow: the **1.0 mm seam collar step** 1 mm above the bed, and the **2.8 mm tongue-groove ceiling** 4.2 mm above it. Neither needs support. - Masonry is **cut, never added**, and every bed joint lands on a vertical face, so no course is a stacked ridge waiting to delaminate.  ## Step 5 — assemble Drop the lid on. The base's tongue rises 4 mm above the seam and enters the lid's groove with 0.2 mm clearance per side — it locates the upper works with no push-fit at all. The joint sits at the bottom of a 2 mm recessed shadow line, so it reads as a masonry drip course rather than a print seam.  If the lid rocks, deburr the elephant's foot on the **tongue** rather than sanding the groove: the groove's ceiling is a bridge and is the softer of the two. It is a friction-free fit by design, so remember it **holds by gravity alone** — see the warning above before you use it as a travelling case. The `.scad` source is included if you want a different size, a plain roof or a deeper cavity.