Procure Part Specs & Datasheets for Sourced Components

We've already sourced candidate parts (see BOM.md). To design the I/O board and firmware, drive the motors and fans, and build accurate mounts, we need each part's detailed electrical + mechanical specs — pinouts, voltages, currents, encoder PPR, torque, waveforms, etc. Vendors rarely publish these for vacuum sub-assemblies, so contributors will find datasheets, ask vendors, or safely reverse-engineer them.

This is the electrical/mechanical data companion to source-3d-models (which covers the geometry). No robotics background needed — a multimeter, patience, and (for reverse-engineering) an oscilloscope go far.

Please check BOM.md and the sourcing follow-along blog post for datasheets/specs already found.

What we need, per part

Drive wheel assembly (Roborock-family — see BOM)

motor model; motor/assembly datasheet (if any)
encoder type + PPR (pulses per revolution)
gearbox ratio; wheel diameter
rated + max motor voltage, current (no-load & stall), torque
max / rated wheel speed
cable length(s); connector models (both ends); full connector + motor pinouts
wheel-drop sensor model + pinout (these modules include one)
signal waveforms (encoder channels, motor drive)
assembly weight

Suction fan / blower (several options sourced — see BOM)

fan/motor model; datasheet
rated voltage, current, RPM; airflow + static pressure (Pa)
how to drive it — BLDC driver + control interface (PWM / tach / hall / 3-phase), soft-start / protection behaviour
connector model(s) + pinout; cable length
signal waveforms
weight

Caster / universal wheel assembly (Roomba-family — see BOM)

model, dimensions, mounting, any embedded sensor, weight, datasheet

Already found vs still missing

Found

Fan datasheet (some options): https://file.elecfans.com/web1/M00/CC/89/o4YBAF-ZOBKAQBvyADDMAglsvTw020.pdf
Nidec BLDC motors (candidate fan motors — bare motors, not the full suction assemblies): NCJ-20N Type-3, NCJ-20N Type-4
Driving the fans: ripinteer/fan_protector — reference for driving / protecting the BLDC blower (from earlier project research)

Still missing (help wanted)

Connector pinouts + cable lengths for wheels, fans, caster
Encoder type + PPR, gearbox ratios, torque/current under load
Wheel-drop sensor model + pinout
Signal waveforms (encoder, motor/fan drive)
Suction-assembly-level datasheets (we have some bare motors, not the assemblies)
Weights; caster specs

Reverse-engineering — only if specs can't be found, and SAFELY

If a spec isn't published, reverse-engineer it by opening an existing vacuum and probing. Safety first:

Don't do it unless you're qualified, experienced.
Opening a vacuum usually voids the warranty and can damage it — accept that risk knowingly.
Secure / prop up the vacuum so it can't scoot off the table or bench when the wheels or fan spin during testing (clamp it, or raise the wheels off the surface).
Respect the Li-ion battery — don't short, pierce, or stress the pack; disconnect where sensible.
Mind pinch points and spinning parts — keep fingers/hair clear of the impeller and brushes.
Any mains-connected testing (e.g. a dock) — extra caution; isolate.
Use a multimeter + oscilloscope to capture voltages, currents, and waveforms; trace and label connector pinouts; photograph everything.

Legal:

By performing any work for this project including reverse engineering you agree to
- wave liability, indemnify this project, the legal entity behind it (Remake AI Statutory Trust) and and its founder
- contribute your work and results thereof, if any, as open-source, to be published under Apache 2.0 license

Submit

A PR to contributions/part-specs/<your-github-username>/<part>/:

a spec sheet (markdown table) with everything you found
any datasheets (PDF) and source links
photos of connectors + labelled pinouts
waveform captures where reverse-engineered
provenance — which vendor / model / revision the data is from
announce it in Project Discussions

Acceptance criteria

Spec sheet for a part (or a clearly-scoped subset)
Datasheets / links where found
- pinouts + waveforms where reverse-engineered when appropriate
Provenance stated (part / vendor / revision)
Verifiable by someone else with the same part
TBD, expect criteria to evolve

The maintainer selects among compliant candidates using these criteria. Multiple attempts are welcome and useful even if not selected — a non-selected spec sheet is still a valid reference and a fallback.