What are the disadvantages with CNC machining?
In essence, the only disadvantage of CNC machining compared to other RP processes is in the lead-time. Since CNC machining involves CAM programming, much time is spent programming toolpaths- the more complex a part is, such as deep 3D surfaces, bosses and snap details, the longer it takes to program. Also, if materials harder than plastics are used, longer periods of machining time are required. An item such as a cellphone requires only a few hours on an SLA machine, but may take up to a full day to complete with CNC machining. However, with the quality and accuracy of the prototypes produced, this is only a minor inconvenience.
