Meet the SACRA Robot (PRRR)—a 3D-printable, four-axis robotic arm powered by NEMA 17 stepper motors. Its PRRR (Prismatic-Rotational-Rotational-Rotational) configuration provides a versatile range of motion, making it ideal for light assembly, educational projects, and DIY automation demonstrations. This design stands out for its compact form factor, robust structure, and open-source inspiration—perfect for makers and robotics enthusiasts looking to explore or teach mechanical motion control.