# PCBWay order: SandTable Controller v0.4

## Files

| File | Where it goes |
|---|---|
| `1-gerbers-sandtable-controller-v0.4.zip` | PCB order: **Upload Gerber file** |
| `2-bom-sandtable-controller-v0.4.csv` | Assembly order: **BOM file** |
| `3-centroid-sandtable-controller-v0.4.csv` | Assembly order: **Centroid / pick-and-place file** |
| `assembly-top-v0.4.pdf` | Attach if PCBWay asks for an assembly drawing |
| `schematic-v0.4.pdf` | Attach if PCBWay asks for a schematic |

## PCB settings

| Setting | Value |
|---|---|
| Board type | Single pieces |
| Size | 80 x 63.34 mm |
| Quantity | 5 (the minimum) |
| Layers | 2 |
| Material | FR-4, TG130-140 |
| Thickness | 1.6 mm |
| Min track / spacing | 6/6 mil |
| Min hole size | 0.3 mm |
| Solder mask / silkscreen | any colour / white |
| Surface finish | HASL lead-free (or ENIG) |
| Via process | Tenting vias |
| Finished copper | 1 oz |
| Product No. | Specify a location (the back of the board has a "WayWayWay" marker for it) |

## Assembly settings (PCB Assembly quote)

| Setting | Value |
|---|---|
| Service | Turnkey (PCBWay buys the parts) |
| Assembly side | Top side only |
| Quantity | 1 or 2 (fewer than the 5 bare boards is fine) |
| Unique parts | 31 |
| SMD parts | 47 |
| BGA / QFP parts | 0 |
| Through-hole parts | 12 (10 designators; each driver socket is 2 headers) |
| Accept alternatives | Yes, for lines marked "Any brand" |

**Note for PCBWay** (paste into the comments box):

> Please fit the female header sockets for A1 and A2 only. Do not supply the stepper driver modules; I will plug in my own. BOM lines marked "Any brand" may use any equivalent part to the description. U3 (AP7361C-33E) has a different pinout from AMS1117-type regulators, so please do not substitute it. Leave solder jumper JP1 open. C16 and C17 sit between the driver socket strips, under where the modules plug in; that is intended. Centroid coordinates are in mm, with the origin at the board's bottom-left corner.

## When PCBWay sends their review
- Check the polarity of C1, C2 (electrolytic), D1-D3, D6, D7 (diodes) and D4, D5 (LEDs) against the + and bar marks in `assembly-top-v0.4.pdf`.
- Check that the ESP32 (U1) antenna end sits at the board edge, over the copper-free area.
- Check that pin 1 of U2, U3, U4 and U5 is at the dot or triangle on the silkscreen.
- U3 is an AP7361C-33E, not an AMS1117: its pinout is different (pin 1 IN, pin 2 GND/tab, pin 3 OUT), so it must not be swapped for a 1117-type regulator.
- JP1 is a solder jumper (bare pads), not a part: leave it open.