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Home NEWS Science News Technology

Exploring the Future: Electronics-Free Robots Crafted Directly from 3D Printers

Bioengineer by Bioengineer
March 25, 2025
in Technology
Reading Time: 4 mins read
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Robot closeup

Imagine a robot that walks seamlessly, activated solely by a cartridge of compressed gas, and is produced with a desktop 3D printer. This groundbreaking innovation, developed by the Bioinspired Robotics Laboratory at the University of California San Diego, represents a significant leap forward in robotics engineering. The researchers laid bare their achievements in the journal Advanced Intelligent Systems, introducing a new category of robots that function without the need for any electronics.

The researchers embraced a minimalist approach to create this robot. Utilizing an ordinary desktop 3D printer and readily available filament material, they crafted machines that exhibit remarkable capabilities. Each robot, costing about $20 to manufacture, encapsulates robustness, affordability, and practicality. These features stand in stark contrast to the expensive, complex robotic prototypes that often dominate current research and market realms. The simplicity of the design reflects a paradigm shift in how robotic systems can be constructed, focusing on accessibility and sustainability.

Dr. Michael Tolley, a prominent figure in the UC San Diego Department of Mechanical and Aerospace Engineering, emphasized the paradigm-altering nature of their work. The implications for future robotic applications could be vast, ranging from scientific missions in harsh environments, such as those exposing robots to strong radiation, to disaster response scenarios where electronic devices may fail. The simplicity in operation and construction speaks to a model where complex robotics can be manufactured swiftly and inexpensively, making robotics more democratic and widely accessible.

The laboratory thoroughly tested the robots’ functionality in controlled conditions. Remarkably, they demonstrated the ability of these autonomous machines to operate continuously for three consecutive days when connected to a gas under constant pressure. Observations from outdoor trials revealed that the robots could walk untethered across various terrains such as grass, sand, and even under water—showing unheard-of versatility in robotic locomotion. These capabilities open a new frontier in robotic applications, where electronics-heavy systems would typically falter.

The core innovation lies not only in the robot’s locomotion but also in its materials and manufacturing process. Traditional robotics often relies on rigid components, but this new breed of robot is fashioned entirely from soft materials 3D-printed in one go. The creators sought to harness the possibilities of soft robotics, built entirely from flexible materials, forging a direction that diverges significantly from conventional practices in robotic design.

The challenge of integrating artificial muscles and control mechanisms into a single printed entity was significant and not without its complexities. Led by Yichen Zhai, a postdoctoral scholar in Tolley’s group, the team adapted existing 3D printing techniques into a format usable for more complex designs. Their endeavors resulted in a six-legged robot, a feat representing not merely progress but a “giant leap” towards innovative autonomy in walking machines. Zhai’s enthusiasm reflects the technological marvel achieved, emphasizing a future where walking robots can be birthed directly from printing technology.

The proxy for motion in these robots includes a pneumatic oscillating circuit controlling the soft actuators, akin to the steam engine’s mechanics. This circuit is crucial as it delivers air pressure in alternating patterns, coordinating intricate movements across the six legs of the robot. Each leg’s functionality includes moving in four dimensions—up and down, and forward and back—facilitating reasonable forward motion. By employing a novel approach to control, the robots achieve smooth, rhythmic walking reminiscent of biological creatures.

Future endeavors for the team address the operational limitations related to compressed air. The goal includes innovative strategies for storing gas internally within the robots while pursuing the integration of recyclable or biodegradable materials. On top of this, the researchers are keenly interested in expanding the robots’ skill set; adding limbs capable of grasping or manipulating objects could serve a meaningful purpose in practical applications, further enriching the realm of soft robotics.

Collaborating with BASF through the California Research Alliance (CARA), the research group has tested an array of soft materials appropriate for standard 3D printing. The collaborative efforts have yielded promising results, although many high-end materials analyzed remain unavailable commercially. Nevertheless, successful trials with readily accessible filament reaffirm the project’s goals, illustrating that significant advancements in robotics can emerge from familiar technology harnessed with innovative thinking.

This collaboration stands as a testament to interdisciplinary partnerships in advancing scientific frontiers, showing how collective expertise can drive innovation. Funding from the U.S. National Science Foundation underscores the crucial support systems that propel research endeavors, making it possible for teams like Tolley’s to explore uncharted territories in robotics. By showcasing their completed walking robot at the Gordon Research Conference on Robotics in 2022, the researchers not only shared their findings but also positioned themselves at the forefront of robotics advancement.

As they navigate the future, the ambitions of this research team highlight a trend towards autonomy in robotic systems, exemplified by the seamless manufacture and deployment of functional machines. Bridging the gap between the realms of engineering, materials science, and robotics, they stand poised to inspire a new generation of devices that can function independently of traditional electronic constraints. This transformation in robotic creation reflects a profound change not just in technology, but potentially in how society interacts with and relies on autonomous machines.

The introduction of this robotics approach could revolutionize fields such as disaster relief, environmental monitoring, and even aerospace exploration, where traditional electronics may not withstand the operational environments. With each stride forward in research and development, the potential applications for such walking robots continue to broaden, paving the way for a future rich with possibility. The legacy of this innovative work ensures that future generations will benefit from advancements originally conceived in a university laboratory, married to the accessible technology of 3D printing.

In conclusion, the endeavor by the Bioinspired Robotics Laboratory signifies more than a technical achievement; it embodies an evolution within robotics that prioritizes sustainability and efficacy without compromising functionality. Their groundbreaking findings, paired with a commitment to easy-to-manufacture designs, will likely influence forthcoming research paradigms across disciplines, reinforcing the notion that innovation thrives at the intersection of creativity, practicality, and technology.

Subject of Research: Robotics
Article Title: Monolithic Desktop Digital Fabrication of Autonomous Walking Robots
News Publication Date: 1-Sep-2025
Web References: Advanced Intelligent Systems
References: None
Image Credits: David Baillot/University of California San Diego

Keywords

Robotics
Soft robotics
Additive manufacturing
Robotic legged locomotion
Bioinspired robotics
Control systems

Tags: 3D printed robotsaccessible robotics solutionsaffordable robotics engineeringBioinspired Robotics Laboratorycompressed gas-powered robotsdesktop 3D printer technologyelectronics-free roboticsfuture of robotic applicationsminimalist robot designparadigm shift in roboticssustainable robotic systemsUC San Diego innovations

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