MTG Saga Chapter Dial (I/II/III/IV)

A small ornate dial for tracking which **chapter** of a Saga

enchantment you're currently on. Saga cards in Magic: the Gathering

have 3 or 4 chapter abilities (printed I, II, III, IV) that trigger

in sequence — this dial lets you mark the active chapter at a glance

without a fistful of +1/+1 counters or a dice that gets bumped.

## Layout

```

                I

               ╱│╲

              ╱ │ ╲           ← rotating pointer

         IV ──┼─┼─── II

              ╲ │ ╱

               ╲│╱

                │

               III

```

- **55 mm disc** with engraved laurel-wreath border and Roman numerals

  at the cardinal points (12 / 3 / 6 / 9 o'clock = I / II / III / IV).

- **Snap-fit pointer** drops onto the centre post and rotates freely.

- Inner / outer ring engravings frame the numeral band.

## What you print

The body+accents are a **coordinate-locked two-colour print**:

- `combined.stl` — ASCII multi-solid (body + accents) for Bambu

  Studio's *Split to Parts* workflow. **Recommended.**

- `body.stl` — filament A (dark dial body) — single-colour fallback.

- `accents.stl` — filament B (gold engraving plugs) — drop into the

  body's recesses if printing the parts separately.

- `pointer.stl` — the rotating pointer (separate small part).

## Bambu AMS workflow (recommended)

1. **Import** `combined.stl` into Bambu Studio.

2. **Right-click** the imported object → *Split to Parts*.

3. Two sub-parts named `body` and `accents` appear, locked at exact

   coordinates.

4. Assign **filament A (dark / structural)** to `body`.

5. Assign **filament B (gold / accent)** to `accents`.

6. **Import** `pointer.stl` separately, assign filament B.

7. Slice. Print flat on the bed, no supports.

> Why combined STL with named solids? Bambu's "Add Part" workflow

> rearranges coordinates — the gold accents would land off-centre.

> A single ASCII STL with two named solids + Split-to-Parts

> preserves alignment exactly.

## Single-colour fallback

If you don't have AMS, print only `body.stl` + `pointer.stl` and

accept a monochrome dial — the engravings are recessed and remain

legible. Or pause-and-swap filament at the layer where the laurel

band starts.

## Snap-fit centre post

The dial's centre post has a 0.25 mm-interference snap ridge; the

pointer's slotted bore compresses past the ridge once on assembly,

then locks the pointer in place but free to rotate. Tuned per the

mana-counter recipe in the source repo

(`docs/research/snap_fit_post_and_slotted_bore.md`).

## Print settings

- Bambu Lab P2S or any 0.4 mm FDM

- 0.2 mm layer height, 2 walls, 15 % infill

- PLA Basic

- **No supports**

- Dial: print **face UP** on the bed (engravings on top)

- Pointer: flat

## Source

Full parametric `.scad` is included. Variables at the top of the

file control diameter, border ornament density, font, and snap-fit

tolerances.

Fan content for **Magic: the Gathering** by Wizards of the Coast —

not affiliated.