Paste printers are a specialised further development of additive manufacturing, in which paste-like materials are extruded in layers to create three-dimensional objects. To process these materials, paste printers have precise control of pressure, temperature and output quantity. This technology enables the production of functional or biocompatible components, customised workpieces or prototypes with complex geometries.

The Sigma R19 from BCN3D Technologies is a professional 3D printer based on Fused Filament Fabrication (FFF) technology with an Independent Dual Extruder (IDEX) system. The device works with two independent extruders, which allows simultaneous printing with two materials or colours as well as special operating modes such as mirror and duplication mode. With a size of 210 x 297 x 210 mm and a print resolution of 0.05 to 0.5 mm, which depends on the nozzle set used, the Sigma R19 is a compact but powerful printer. The positioning accuracy is 0.0125 mm on the X and Y axes and 0.001 mm on the Z axis. During printing, the nozzles can reach a temperature of up to 290 °C and the heating bed a temperature of up to 100 °C. The printer uses filaments with a diameter of 2.85 ± 0.05 mm and is compatible with a wide range of materials. These include PLA, ABS, nylon, PET-G, TPU, PVA and other mixed materials. The printer's electronics are based on proprietary BCN3D hardware, which is supplied via USB with print data that has previously been prepared using the in-house BCN3D Cura software. This offers validated profiles for various materials and utilises the advantages of the IDEX system. The Sigma R19 also emphasises user-friendliness, with interactive instructions on the touchscreen to support the user during setup and calibration.

To summarise, the Sigma R19 combines precise mechanics with user-friendly software and flexible material selection. Thanks to its independent extruder system, it is suitable for both prototyping and professional use, where reliability, repeatability and material variety are crucial.