ckoch/sandTable
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Build guide: parts, printing, assembly in order, wiring, first run

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BUILD.md walks through the whole build: what to buy (parts and screws), the
v3 print list with materials and supports, case, electronics (microstep
jumpers, driver current), centre, the arm on the bench, hub and slip ring,
wiring to the CNC shield, software setup and a first run without sand, then
floor, magnet height, sand and glass, plus troubleshooting.

Also adds the 608 fit test to print/v3 so the v3 folder is complete.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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ckochandClaude Opus 5.5 committed 2026-11-01 13:53:55 -05:00
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README.md
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A 12" kinetic sand table that draws patterns in sand. A steel ball rolls under glass, pulled by a magnet on a polar arm underneath. The case is about 12.5" across and 5" tall. The parts are 3D-printed for a Bambu P1S and designed in SolidCraft.
**Building one? Start with [BUILD.md](BUILD.md):** parts to buy, what to print, assembly in order, wiring, the first run and troubleshooting.
- `sand-table-v3.solidcraft`: the printable design (latest). Bodies named `REF_*` are bought parts, modeled for fit only. `sand-table-v2.solidcraft` is the previous version.
- `print/v3/`: STL files for every printed part of the v3 build. **Use this set.** Print `00b-fit-test-6804` first. `print/README.md` has the parts list, print notes and assembly order; the older folders are kept for reference.
- `print/v3/`: STL files for every printed part of the v3 build. **Use this set.** Print the two fit tests (`00`, `00b`) first. `print/README.md` has the parts list, print notes and assembly order; the older folders are kept for reference.
- `software/`: the pattern player. Start it with `python3 -m sandtable web` for a web page with a library of designs; it drives the table from a computer over USB and erases between patterns. See `software/README.md`.
- `pcb/`: an optional custom controller board (ESP32 + 2× DRV8825, FluidNC) that fits the Uno standoffs, with PCBWay order files. See `pcb/README.md`.
- `sand-table-v2-assembly.step`: the v2 assembly, for viewing in any CAD tool.