MAREP 300 is a special type of 3 d printer dedicated to materials research purposes. It uses raw pellets or flakes or powder as input for printing via Direct material extrusion deposition technology. The extruder nozzle setup is fixed, in contrast to many commercial printers, and the cartesian movement is fully executed by the bed system. The fixed nozzle offers a more stabilized extrusion of the material. The total print volume offered is 300 x 300 x 300 mm with a closed build chamber. The onboard camera and dedicated user-friendly application can support in situ print monitoring and control