How easy is it to change the tool heads: it’s all well and good having powerful tool heads that work perfectly, but if they’re too difficult or delicate to switch out, they may as well only have one function.Laser engraver power: as with the CNC machine, some all in 1 laser engraver 3D printers can only engrave, whereas others can cut through materials.More powerful CNC machines spin faster, can carve tougher materials, and work more accurately and for longer. CNC mill power: some CNC machines cannot fully mill, but just engrave.Therefore, the 3D printer’s quality is key. 3D printer quality: most of these 3 in one 3D printers are made by 3D printer companies and are mostly focused on additive manufacturing.In rating the 3 in 1 3D printers we recommend below, we compared: The criteria we used to judge the best 3 in 1 3D printers Some 3-in-1 printers actually have the capacity for more than 3 functions, such as including dual extruders, food extruders, and more. They use a modular system to swap between functions, and are best for hobbyists who want multiple tools while saving money and space.