Dutch Startup Tesseract Wants Linear Motors to Replace Belts on 3D Printers

Almost every 3D printer on the market moves its printhead the same way: a motor spins a pulley, a belt pulls the carriage back and forth. The design is cheap to build and easy to maintain, but it comes with real tradeoffs. Belts stretch, they vibrate, and they lose stiffness as temperatures change. On a fast, large-format machine, those imperfections appear as visible artifacts on the printed part.

Dutch startup Tesseract Technologies thinks the industry can do better. The company is developing a linear motor system built specifically for 3D printers, with hardware, electronics, sensors, and firmware all designed in-house. The stated goal is to make linear motor motion accessible at two to five times lower cost than comparable industrial alternatives.

Why belts hold 3D printing back

A belt behaves like a rubber band. Every time the printhead changes direction, the belt stretches slightly before snapping back. That elasticity introduces lag and vibration. It also means the machine is never quite where the firmware thinks it is, especially at higher speeds. Input shaping can partially compensate, but it introduces other tradeoffs such as corner rounding.

The problem scales with machine size. On a small Cartesian printer, the belt run is short and the load is light. On a large-format machine with a heavy gantry or a pellet extruder, the belt stretches further, vibrates more, and wears out faster. A linear motor removes the elastic link entirely. Magnets sit in the axis, coils sit in the carriage, and the carriage is driven directly. Position is measured and corrected continuously in a closed loop.

Designing for cost, not performance

Industrial linear motors already exist, but their pricing reflects the aerospace and semiconductor markets they were built for. Tesseract founder Timothy Kramer tackled the cost problem during his university thesis by designing a motor optimized specifically for additive manufacturing rather than adapting an existing industrial part.

The company maintains a database of over 15 million motor model variants and applies an optimization process to find the lowest-cost design that meets performance targets. Combined with off-the-shelf electronics and readily available materials, the result is a platform the company claims is two to five times more cost-effective than comparable products.

Running on a real machine today

Tesseract's motors are already installed on the FELIX Pro XXL from FELIXprinters, a Dutch large-format machine with a build area of roughly one by 1.5 meters and dual independent toolheads. The pair demonstrated the setup at Formnext 2025 in Frankfurt and will return to the event in 2026 with an updated version. The collaboration has also revealed what machine builders need to know before integrating linear motors. The motor itself is only part of the system: the frame around it must be mechanically sound, and that conversation now happens early in every new partnership.

What comes next

Tesseract is preparing a commercial launch for the first quarter of 2027 alongside a manufacturing partner that will handle series production and industrialization. The company will supply the motor technology and control systems while the partner brings large-scale manufacturing capability.

The bigger shift lies in what the technology enables. Because multiple carriages can move independently on a single axis, machines can be designed with several toolheads working on the same part at the same time. That is not a faster belt drive: it is a different way to design machines entirely. Tesseract is also talking to slicing software developers to make simultaneous multi-toolhead printing a practical reality.

Linear motors have been the preserve of high-end industrial equipment for years. Tesseract's approach does not lower performance: it lowers the cost of accessing that performance. If the company delivers on its Q1 2027 timeline, the next generation of desktop and prosumer 3D printers may leave the belt behind entirely.