From first sketch tofinished productend to end.
Karvyn 3D is a product design and development firm. We take complex hardware problems — across industrial, research, and emerging technology sectors — and engineer them into physical products through precision CAD, electronics, and advanced manufacturing.
Supporting Research In
Engineering hardware from idea to production.
We don't specialise in a single stage of product development. From early concept and CAD engineering through to electronics integration, physical prototyping, and low-volume manufacturing — we run the full path. That means a single point of accountability from the first sketch to the finished product in your hands.
Modern neuroscience demands instruments that account for exact morphology and electromagnetic constraints without compromise.
Adapting general-purpose equipment introduces variability and forces researchers to spend time on engineering workarounds rather than actual research.
Design & Engineering
Juvenile animals, non-standard species, and morphologically variable subjects require instruments sized and shaped to them — not to the average rodent a manufacturer imagined.
Rapid Prototyping
Physical prototypes built fast, in the right material for the application. Advanced FDM manufacturing across engineering-grade polymers — PETG, TPU, ASA, PETG-CF — with real tolerances and real performance characteristics.
Low-Volume Manufacturing
Beyond the prototype. We produce small production runs with consistent quality — without the tooling costs or minimum order quantities that conventional manufacturing demands. Right-sized for the stage your product is at.
Designed from first principles.
Delivered as finished products.
Each instrument begins as a research problem. We engineer the solution, test it alongside active researchers, and deliver a lab-ready product.
Custom Rat Restrainers
Precision Fit · Material Engineering · MRI-Compatible
Unsedated animal imaging demanded restraint hardware sized to developmental stage and verified safe for high-field scanner environments
A family of MRI-compatible restraint devices sized across the rat developmental range — from juvenile to adult. Structural components in verified scanner-safe PETG; animal-contact surfaces in clear TP...
Falcon Tube Holder
Custom Tooling · Fixture Design
Non-standard tube geometry required a holder array that no catalogue supplier stocked
Purpose-built storage and organisation hardware for a non-standard tube geometry. Exactly the kind of precision fit problem where a custom-engineered part outperforms any approximation from a supplier...
Beam Walk Test Apparatus
Modular Design · Repeatability · Structural Engineering
Fixed-format test apparatus couldn't support the variable beam widths and surface conditions a rigorous experimental protocol required
A modular beam walk rig for rodent motor coordination assessment. Designed as an interchangeable system — beam width variants, calibrated surface textures, and stable end platforms — so the apparatus ...
Joystick Stabiliser Base
Ergonomic Design · Material Application · Stability Engineering
A joystick required a wider, more stable base in a material compatible with a sensitive electromagnetic environment
An expanded base platform for a control joystick, engineered for stability and material compatibility with a constrained electromagnetic environment. Demonstrates applied material selection and ergono...
Crow Behavioural Test Gate
Mechatronics · Embedded Systems · Custom Enclosure
Behavioural research needed an automated gate mechanism with precise event-triggered actuation, data logging, and a compact physical form
An automated gate system for avian behavioural research trials. ESP32-based control logic handles servo actuation triggered by force-sensitive resistors, with serial data output for experimental loggi...
Where we work,
and where we're headed.
Our engineering capability doesn't change by industry. What changes is the problem. We currently serve two sectors actively, and are building depth toward three more.
Industrial & Automation
Custom jigs, fixtures, tooling inserts, enclosures, and precision mechanical components for manufacturing and automation environments. Where exact-fit, low-volume hardware requirements fall between standard catalogue parts and full-scale tooling investment — Karvyn 3D fills that gap. Fast turnaround, real engineering.
Research & EdTech Hardware
Precision instruments for neuroscience, behavioural research, and technical education — where experimental validity demands hardware engineered to the exact protocol, species, and environment. This is where Karvyn 3D's capabilities were proven, and where our deepest application knowledge sits.
MedTech
Assistive devices, clinical tools, and precision medical hardware requiring exacting material selection, dimensional accuracy, and design for regulatory consideration. Our material engineering background and precision manufacturing capability make this a natural expansion.
Robotics & Embedded Systems
Custom actuator mounts, sensor housings, control enclosures, and electronics-integrated structural components for robotics applications. Our ESP32-based embedded systems work and mechatronics experience translates directly to this space.
Aerospace & UAV Systems
Lightweight structural components, mount fixtures, and assembly tooling for unmanned aerial vehicles (UAVs) and satellite payloads. Vetting materials for temperature stability and strength-to-weight performance.
The technical stack
behind every build.
Each project draws from a set of capabilities that have been developed and proven across real client work. We don't subcontract the hard parts.
CAD & Parametric Engineering
Full 3D mechanical design in Autodesk Fusion 360 and FreeCAD. Parametric models built for variant families, toleranced for manufacturing, and structured for iteration.
Embedded Systems & Firmware
Sensor integration, microcontroller-based control logic, actuator systems, and serial communication — designed, coded, and integrated into the physical product.
Material Engineering & Selection
Material choice is an engineering decision, not a default. We characterise and select polymers for the specific demands of each application — mechanical load, chemical exposure, temperature, or regulatory environment.
Advanced FDM Production
Multi-machine FDM manufacturing capability for prototypes and low-volume runs. Process-controlled printing, validated profiles per material, and production-quality outputs — not desktop hobbyist results.
A clear path from problem to product.
Every engagement runs through the same disciplined process — whether it starts from a napkin sketch or an engineering brief.
Engineering Brief
We take the problem — not just the spec. Function, environment, constraints, and production intent all inform the brief. We ask the questions that shape the right design before any CAD work begins.
Design & Architecture
Mechanical design, material selection, and electronics architecture developed in parallel. Fusion 360 models built parametrically for variant flexibility. Design decisions documented for manufacturing traceability.
Prototype & Validate
Physical prototypes in final or representative materials. Performance tested against the brief. Iteration is expected — we build that into the timeline, not around it.
Refine & Lock
Design locked based on validated prototype data. Manufacturing files prepared, tolerances confirmed, and production process characterised before any volume is committed.
Deliver
Finished product — whether a single validated prototype or a low-volume production run — delivered ready to use. No handoff chaos. What we engineered is what you receive.
Have a hardware problem that needs engineering?
Tell us what you're trying to build — the application, the constraints, and where you are in the process. We'll respond with a direct assessment of what we can do.