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CNC stands for Computerized Numerical Control. A CNC is better by precision, it allows for high end engraving of metals in 2D and in 3D to produce amazing results. The probalem with CNC machines is that they are expensive and the desktop version always disappoint because precision requires no unintended movements such as from inertia and from weight of the spindle for example. Higher precision machine probably have a fixed spindle and a moving bed.

Another factor affecting precision is the use of advanced motion control systems, high-quality bearings, and accurate feedback mechanisms like encoders. Additionally, software plays a crucial role in generating accurate G-code, which is the language that tells the CNC machine how to move.