Printing & Assembly

How to print the parts and put Mote together. Wiring is covered separately in WIRING.md; the part files live in step/ (editable in CAD), stl/ (mesh) and 3mf/ (mesh + print setup).

⚠️ Print settings below are sensible starting points, not measured-optimal — confirm against your printer/filament. The .3mf files carry their own plate setup; prefer them if your slicer reads 3mf.

Printing

All parts fit a 256 mm bed (the chassis is 235 mm — see design rationale).

Suggested defaults: PLA, 0.2 mm layer height, 3 walls, 15–20% infill, brim on the large flat plates to prevent corner lift.

Part (qty)	Material
Chassis Base (1)	PLA
Chassis Top (1)	PLA
Motor Support (2)	PLA
Pi Bottom + Pi Top (1 each)	PLA
Waveshare Mount (1)	PLA
C1 Lidar Mount (1)	PLA
Camera Mount (1)	PLA
Battery Mount (1)	PLA
Wheel Inner (2)	PLA
Wheel Tyre (2)	TPU (grip)
Caster (1)	PLA
SO Base ORP (1, optional)	PLA

Notes:

• Wheels are two-part: a rigid Wheel Inner hub plus a Wheel Tyre printed in TPU for traction.
• Caster is unresolved — printed and several off-the-shelf options have all been unsatisfactory so far; treat this part as provisional. A bought ball caster of the right height may be preferable (see Assembly step 6).

Assembly

Hardware: the M3 button-head hex set from the BOM (screws, nuts) covers all fasteners. Most joints take M3×12: the screw passes through a ~6 mm plate into a part with a ~6 mm captive-nut pocket. Use M3×10 for thinner stacks.

Note: I am not convinced yet that screws and nuts are the optimal choice here. Nuts have a tendency to loosen up due to vibrations while driving around so we may want something more reliable.

Suggested order:

1. Servos. Mount each STS3215 to the Motor Support, then press a Wheel Inner onto the servo horn and fit the Wheel Tyre over it. Wheels are centred and inset so the footprint stays circular. It's easiest to set the servo ID's before going further. Left servo is ID 7, right is ID 9 (assign with pixi run setup-ids — see the README).
2. Lower plate. Fasten the Motor Support/servos, the Battery Mount, the Waveshare Mount, and the C1 Lidar Mount, to the Chassis Base.
3. Caster. Fit the front Caster to the underside of the base for the third contact point (provisional — see Printing notes).
4. Sensors. Mount the camera in the Camera Mount.
5. Pi cooler. Fit the Active Cooler to the Pi: peel the thermal pad backing, press the spring push-pins through the Pi's two mounting holes, and plug the fan cable into the 4-pin FAN header. The Pi can already be in its Pi Bottom holder — just not with Pi Top on.
6. Top plate. Attach the Pi Bottom holder and the Camera/Camera Mount to the Chassis Top.
7. Close it up. Fix the Chassis Top onto the standoffs.
8. Power bank. Seat the power bank in the Battery Mount between the plates.
9. Wire it. Follow WIRING.md: bank Out1 → servo board (barrel), bank Out2 → Pi, servo board USB → Pi, lidar/camera USB → Pi. Route cables through the standoff gap and keep the lidar's 360° view clear.
10. (Optional) SO-101 arm. The SO Base ORP adapter mounts the SO-101 follower arm on the ORP grid.

Then bring the software up per the main README.