3D Print Open Source AI Robots

Solo12 is an open-source 12-DOF quadruped robot from the Open Dynamic Robot Initiative (ODRI), a collaboration between MIT, LAAS-CNRS, NYU, and MPI-IS to provide the legged-locomotion research community with an affordable, reproducible platform for dynamic control research. The robot has four legs, each with three degrees of freedom (hip abduction/adduction, hip flexion/extension, and knee), actuated by ODRI's open-source brushless direct-drive actuator modules. Direct-drive transmissions give the robot high-bandwidth torque control and transparent dynamics — critical for whole-body MPC, reinforcement learning, and contact-rich locomotion experiments that are difficult or impossible on geared quadrupeds. Solo12 has been used in dozens of published locomotion papers studying bounding gaits, stair climbing, reactive balance control, sim-to-real reinforcement learning, and model-predictive control. The full hardware and software stack — actuator PCBs, mechanical CAD, master board firmware, real-time control interface, and Pinocchio-based dynamics — is published under BSD-3-Clause, making Solo12 one of the most accessible research-grade quadrupeds available. This program provides cloud-side locomotion commands (stand, sit, directional walking, trot, emergency stop) that relay to the onboard controller over WebSocket. The hardware requirement is a Raspberry Pi 4 acting as the high-level controller; the real-time low-level control loop runs on the master board over EtherCAT/SPI to the 12 actuator modules. Credit to the Open Dynamic Robot Initiative consortium (LAAS-CNRS, MPI-IS, NYU, MIT) — upstream repository at https://github.com/open-dynamic-robot-initiative/openrobotactuatorhardware under BSD-3-Clause. Build Guide Step-by-step assembly instructions for the Solo12 quadruped: Solo12 hardware README Printing Solo12 is a research-grade direct-drive quadruped — most of the robot is custom electronics, machined aluminium, and ODRI actuator modules, so the 3D-printed set is intentionally small (this is the correct, complete print set, not a partial one). The 11 parts below are the Solo12-specific printable components, curated from the much larger ODRI repo (which contains 200+ STLs spanning tools, jigs, and other robot configurations). PLA/PETG, ~214 cm³ total. Leg hip modules — print one per corner (4, all distinct): solo12hipfefl (front-left), solo12hipfefr (front-right), solo12hipfehl (hind-left), solo12hipfehr (hind-right) These are the hip flexion/extension housings; each corner is a separate handed part — print all four. Body frame — print one each (5): bodystructurecenter, bodystructureside, bodystructuretopimu (top plate with IMU mount) hipadapter (mounts the hip modules to the body) ledcover (status-LED cover for the NeoPixel ring) Assembly stand (accessory — 2): standfoot and standfork form a benchtop stand/cradle used to hold the robot during assembly and calibration. This is an accessory/jig, not part of the walking robot — print it if you want the stand, skip it otherwise. Not printed: the 12 ODRI brushless direct-drive actuator modules, 6 micro-driver PCBs, master board, IMU, timing belts, bearings, and machined plates are all sourced/fabricated per the BOM — only the parts above are 3D-printed.

Voron Zero is a compact, fully-enclosed CoreXY 3D printer designed for high-speed, high-quality printing in a small footprint. The V0.2 revision is the official release maintained by Voron Design. Highlights 120 × 120 × 120 mm build volume CoreXY motion system Low-mass direct-drive extruder (Mini Stealthburner) Fully enclosed chamber 24V DC heated bed Klipper firmware Filament runout sensor Sensorless homing What's in this program Full STL set for the V0.2r1 revision (134 printed parts) Pointer to the official assembly manual PDF Klipper firmware configuration profile BOM via the Voron Configurator Build notes Most first-timers buy a complete kit rather than sourcing à-la-carte — LDO (~$800), Formbot (~$550), and Fysetc are the common choices. À-la-carte Misumi sourcing runs $400–600 but requires more lead time. Use the Voron Configurator to generate an accurate BOM for your region. The Voron community provides an interactive Printed Parts Guide and an active Discord for build support. Expect a multi-weekend build for first-timers. Links Voron-0 GitHub (STLs + manual) Official Assembly Manual PDF Voron Configurator (authoritative BOM) Printed Parts Guide Voron Discord Klipper firmware docs Source: https://github.com/VoronDesign/Voron-0 (GPL-3.0)