The AXIOM is designed to be a professional-grade machine with all of the modern features that make a 3D printer easy to use, while producing quality results, including: auto-leveling, an “easy feed” filament system, an enclosed build area, and what the company describes as an “end-user replaceable cassette system (ERC)”. While the first features are meant to ensure repeatability and trouble-free printing, the ERC system allows users to upgrade or change extruders. With the ERC, the extruder and its accompanying components are contained within a cassette-like structure that can be removed and replaced with ease.