Philosophy

At first glance, "useless" robots and machines may seem like mere toys with no practical benefit: Head-touching robots designed to trigger pleasant tingling sensations, or mechanical constructions equipped with a subwoofer at every button to generate 3D vibrations and enable a completely new form of perception. In a world heavily focused on efficiency, economic viability, and immediate added value, such projects often appear as a waste of time and resources. However, a closer look reveals that this apparent pointlessness can be a decisive driver for innovation, technological maturity, and sustainable ecosystems.

A prominent example is the development of graphics cards. Originally, they were developed almost exclusively for computer games to enable increasingly realistic graphics and higher frame rates. For years, high-performance GPUs were considered luxury items for gamers and enthusiasts. No one would have seriously claimed that this hardware would one day become a key technology for scientific simulations, machine learning, or Artificial Intelligence. Nevertheless, it was exactly these playful, supposedly purposeless requirements that led to highly parallel computing architectures. Today, GPUs are central AI accelerators and form the backbone of modern AI systems. Without the detour through computer games and the associated "unnecessary" drive for performance, this development would hardly have occurred at this speed.

Useless robots and machines fulfill a comparable role. They create an experimental space in which new mechanics, control concepts, sensor technology, or materials can be tested without the pressure of a clearly defined use case. Developers are allowed to fail, over-dimension, simplify, or deliberately over-complicate. It is precisely through this process that solutions emerge which later become usable in completely different contexts.

This 3D object was the first prototype of a head-touching robot. You can rotate, zoom, and move this object. All green parts are 3D printed. All gray parts are metal. All black and blue parts are servo motors.

A particularly important aspect is modularity. Useless machines serve as an excellent testing ground for modular designs, standardized interfaces, and reusable components. When a robot arm, a drive module, or a control board is not developed for a single, highly specialized purpose, but remains freely combinable, the long-term value of these components increases significantly.

A central prerequisite for this modularity is the consistent use of 3D printing. Additive manufacturing allows mechanical interfaces, housings, adapters, and structural components to be developed quickly, cost-effectively, and iteratively. Modules can be precisely matched to one another, adapted as needed, and reproduced without high tooling costs. This allows new ideas to be physically implemented and tested immediately, which is crucial, especially in early development phases.

Individual modules can thus evolve into a growing ecosystem where components are used multiple times, further developed, and deployed in ever-new combinations. 3D-printed components act as the connecting element between electronics, mechanics, and design. They make it possible to individually expand or modify standardized modules without losing the compatibility of the overall system. In the long run, this lowers costs, significantly shortens development cycles, and promotes collaboration between different projects, disciplines, and actors—from experimental hobbyists to professional development teams.

This 3D object was the second prototype of a head-touching robot. From the first prototype, a completely new approach was developed after tests revealed fundamental weaknesses in the original drive concept.

Another often underestimated effect of such experiments is progressive miniaturization. What starts today as a coarse, inefficient, or over-dimensioned robot becomes smaller, more precise, and more energy-efficient through continuous iteration. Motors shrink, sensors become more sensitive, actuators finer, and controls more powerful with lower energy requirements. This process often begins without a clear target market. Nevertheless, this is exactly how a technological leap can emerge: from macroscopic curiosities to microrobots, and one day, even to nanobots.