Perception crown
LiDAR, stereo RGB, thermal and work-zone cameras maintain the visible-surface model and monitor people, equipment and the placed work.
MEET THE MACHINE / A02 EARTH BASELINETHE
THE
ROVALIZER.
A proposed mobile construction system that carries perception, planning, material preparation and robotic placement through the worksite—turning one fixed print box into a sequence of verified local envelopes.
STATUSConcept architectureBefore G0 freeze
PRIMARY MEDIUMPrintable mortar0–4 mm baseline
FIELD CREW2-person baselineDevelopment assumption
LOCAL REACH3.2 m radius
ROUTE REACHDefined by mission
OUTPUT TARGET0.20–0.80 m³/h
PLACEMENT TARGET±8 mm local
MOVE THE
FACTORY.
To manufacture by moving and re-registering the production frame through the site. The Rovalizer gives up the absolute stillness of a print house in exchange for route-scale reach—and must earn that trade through accurate relocation, seam control and material traceability.
01 / MACHINE ANATOMYSIX SYSTEMS.
SIX SYSTEMS.
ONE CONTROLLED LOOP.
No single subsystem makes a Rovalizer. Mobility, arm dynamics, wet-material behavior, sensing and safety have to close together.
Six-axis arm
A hose-managed manipulator carries extrusion, conditioning, inspection and future finishing tools through each stabilized local envelope.
Material cell
A 650 kg dry day bin, 240 L water tank, metering system, continuous mixer, 220 L agitated buffer and reversible pump keep the wet path short.
Field chassis
Six independently driven wheels provide site mobility. Four outriggers create the stable, surveyed pose required for placement.
Power + compute
A target 118 kWh LFP pack supports motion, material processing and edge compute while a separate safety controller enforces hard limits.
Tool interface
A serviceable quick-change coupling separates the base platform from extrusion, grading, compaction and inspection payloads.
02 / STEP-BY-STEP USEFROM EMPTY GROUND
FROM EMPTY GROUND
TO ACCEPTED WORK.
AI proposes. Deterministic controls enforce. Accountable people release the site, design, material and final work.
Authorize
Humans define the legal work polygon, exclusions, design authority, material specification and stop conditions.
Assess
Import survey, utility, geotechnical and environmental evidence; scan visible terrain and rank build, access, staging and refill zones.
Plan
The AI planning layer proposes geometry and route options inside slope, reach, material, drainage, collision and escape constraints.
Release
An accountable person approves a signed job package. Generative output never directly commands safety-critical motion.
Stage
Scan material lots, load dry constituents and water—or connect a qualified printable wet feed—and run preflight tests.
Stabilize
Drive to the first pose, deploy outriggers, verify bearing response and register the arm to site control.
Place
Meter, mix and pump material while the arm coordinates bead width, path speed, pressure and layer timing.
Verify
Scan each accepted region, compare it with the plan and join geometry to recipe, lot, settings and exceptions.
Advance
Secure the wet path, lift the outriggers, move to the next registered envelope and continue along the route.
Close
Capture purge and wash water, quarantine exceptions and deliver the as-built record for engineering acceptance.
03 / TARGET SPECIFICATIONTHE NUMBERS
THE NUMBERS
TO GO PROVE.
These values frame the current packaging and test program. They are not certified, field-validated or offered performance.
Travel envelope4.6 × 2.3 × 2.7 m
Dry / operating mass4,700 / 6,250 kg
Arm reach3.2 m radius
Vertical reach2.7 m per setup
Nominal bead35–120 mm variable
Qualified output0.20–0.80 m³/h
Placement accuracy±8 mm local-frame target
Climb / side slope28° / 18° target
Onboard material650 kg dry + 240 L water
Wet buffer220 L agitated
Energy118 kWh LFP target
Mixed-duty endurance5–8 h target
EnvironmentalIP65 / −10 to 48°C target
Transport concept20 ft flat rack
04 / INPUTS + OUTPUTSWHAT ARRIVES.
WHAT ARRIVES.
WHAT LEAVES.
Self-mixing is not self-supplying. A02 needs approved information, energy, material, site logistics and accountable acceptance.
REQUIRED INPUTS
Five feeds enter the system.
- AuthorityOwner-approved boundary, exclusions, permits, utilities and human release roles.
- DesignSigned geometry, structural basis, reinforcement and insert plan, tolerances and acceptance rules.
- MaterialQualified binder, graded 0–4 mm aggregate, process water, admixtures and a locked material passport.
- EnergyCharged traction battery plus planned site charging or energy-safe return route.
- SupportRefill pod or wet-feed connection, capture containers, test coupons, spares and trained crew.
SYSTEM OUTPUTS
More than a printed wall.
- Placed workOnly the bounded wall, channel, shell or site element released by the project engineer.
- As-built modelRegistered geometry with accepted regions, deviations, repairs and unresolved exceptions.
- Material genealogyLot IDs, delivered mass, ratios, pressure, temperature, open time and settings by placed region.
- Quality evidenceCoupons, scans, process signatures and human acceptance decisions.
- Contained wastePrime, purge, failed material, hardened waste and wash water with recorded custody.
05 / MATERIAL MODESTHREE FEED PATHS.
THREE FEED PATHS.
NO MAGIC DIRT.
Swovee qualifies the recipe and the complete machine path together. A familiar material name is not approval.
Dry kit
Qualified binder and 0–4 mm graded aggregate stay dry until loss-in-weight screws meter them. Water and admixtures enter the continuous mixer only when the nozzle needs material.
EARTH BASELINEWet bypass
Printable mortar from a mobile batch plant enters through a keyed connection. A02 monitors temperature and pressure, agitates the buffer and pumps it without pretending ordinary ready-mix is printable.
QUALIFIED FEED ONLYTerra kit
Characterized soil is dried or moisture-corrected, processed and screened before entry. A qualified stabilizer and test plan are mandatory; raw excavation never enters the baseline mixer.
PILOT / R&D06 / WHERE IT WORKSONE IDEA.
ONE IDEA.
THREE DIFFERENT MACHINES.
The offworld R01 branch reuses the mobile-work-envelope principle, not the Earth wet path or Earth safety case.
Distributed civil work
Best investigated first for terrain walls, drainage channels, erosion structures, utility protection, non-occupied field shells and geometrically variable site elements.
Test a build scenario ↗Dry surface construction
The mobility and registration idea may survive, but cement does not. A lunar configuration must be redesigned for vacuum, dust, thermal extremes and compacted or thermally fused regolith.
Run the lunar lab ↗Surface factory route
A mission-derived Rovalizer could grade, form, place and inspect local mass for routes, berms and shielding. Power, thermal control and the complete feed process remain open trades.
Enter First Shelter ↗07 / HONEST BOUNDARYWHAT IT DOES.
WHAT IT DOES.
WHAT IT DOES NOT.
The first useful product is a bounded construction system—not an autonomous architect, contractor and building official collapsed into one machine.
Inside the machine boundary
- Visible-surface scanning and local work-zone monitoring
- Constraint-aware planning from an approved design intent
- Stabilization, re-registration and robotic placement
- Dry dosing, onboard mixing, pumping and captured cleanout
- Layer scanning, process logging and exception handling
Outside the machine boundary
- Property rights, buried utilities, groundwater and unseen geotechnical conditions
- Architectural, structural, civil and code authority
- Foundations, roof, doors, services, finishes and waterproofing unless separately scoped
- Automatic structural certification or occupancy approval
- Unsupervised operation around an uncontrolled public work zone
PROVE THE MATERIAL LOOP.
THEN MOVE IT.
The fastest credible path is an instrumented dosing–mixing–pumping bench, followed by a motion mule, then one coupled Alpha whose every placed region can be traced back to material and machine state.