Actually, if you notice the router actually floats concentrically, and you need only to be in the target zone and the machine will self-correct to stay on the programmed outline. So steadiness is not as great a consideration as one might think.
CNC machining, refers to the CNC machine tools for processing a part of the process, CNC machine tool processing and traditional machine tool processing procedures are generally the same, but also has undergone significant changes. Machining method for controlling the displacement of parts and tools with digital information. It is an effective way to solve the problems of variable variety, small batch, complex shape, high precision and high efficiency and automatic processing.