While CNC machines have a host of advantages over NC machines, there are several drawbacks to the modern machining process. One is that it requires fewer skills to use a CNC machine than an NC machine. While this can be viewed as an advantage, it means that the CNC machine operator is less skilled. They don’t learn as much as the NC operator.
Another disadvantage is the cost of this machine tool. Not only is it expensive upfront, but computer numeric control units are also costly to maintain. Luckily, CNCs are becoming more common, with plenty of affordable options now available.
Lastly, it could be argued that the rise of the computer numerical control machine leads to unemployment.