The µRepRap Project aims to bring micron-scale fabrication capabilities to hobbyists and researchers by developing open-source systems that operate at scales previously accessible only through expensive, specialized industrial equipment.
According to the project documentation, the current PIKA V0.02 hardware design achieves repeatable positioning of approximately 1 micrometer with reliable accuracy of 10 micrometers or better within an 8-millimeter cubic volume. Using a fine probe etched with the PIKA mechanism itself, UV resin droplets as small as 4 micrometers have been deposited. With a fiber optic probe, the system has cured resin lines as small as 9 micrometers.
The project is inspired by RepRap’s approach to democratizing desktop 3D printing. The µRepRap team aims to apply similar principles to microscale manufacturing, potentially opening new possibilities in biological sciences and microelectronics. According to the documentation, “if micron scale manufacturing can be achieved by RepRap-like technology, it is likely that these fields will be advanced in the same way that desktop fabrication was by the RepRap.”
The systems use conventional components: NEMA17 stepper motors with 400 steps (or 200-step motors for closer approximation to 1-micrometer movement), USB microscopes for observation, and either UV nail gel resin or other compatible materials for additive fabrication. The probe serves multiple functions as a Z-height sensor, engraving tool, and deposition head, with options ranging from hypodermic needles for initial testing to electrochemically etched wire points for finer work.
Previous iterations include the MAUS C V0.04, which achieved approximately 5-micrometer positioning over a 4-millimeter square, though motion was not linear. The project documentation notes that the system successfully etched a 1.3-millimeter “Hello World” message mechanically using a Sharpie marker on a glass slide.
The project acknowledges significant work remains in determining what materials can be printed and how to create complex 3D structures at the micron scale. The long-term vision includes developing an ecosystem of fabrication utilities operating at progressively smaller scales and eventually constructing useful functional devices at micron scale.
Key facts
- PIKA V0.02 achieves approximately 1 micrometer repeatable positioning and 10 micrometer or better accuracy in an 8mm cubic volume
- The system has deposited UV resin droplets as small as 4 micrometers and cured resin lines as small as 9 micrometers using fiber optic probes
- The project uses NEMA17 stepper motors, USB microscopes, and UV resin or compatible materials for fabrication
- Previous MAUS C V0.04 iteration achieved approximately 5 micrometer positioning over a 4mm square
- The system is designed as an open-source platform to democratize microscale fabrication similar to how RepRap democratized desktop 3D printing