Accurate, high-speed machining requires far more than a fast spindle. The whole CNC and servocontrol system must be tuned to the rigors of the job. Here are the key factors.
For many years, CNC manufacturers have believed their products were capable of high-speed machining because their CNCs could process part-program data at very high rates. This belief was due to the relatively new technology of high-speed and high-precision machining. As the technology matured, it became obvious that the CNC had to be able to do a lot more than just process part-program data at high rates, and that "high-speed" and "high-precision" machining were two separate processes. Today, some CNCs can provide one of these capabilities, but relatively few can do both simultaneously.
Because high-speed and high-precision machining are extremely complex, careful attention must be paid to selecting the proper basic components. These consist of the machine tool itself, the servo system and the CNC. In this article, we will identify and explain the general requirements that a user should consider when selecting a CNC in order to get the best possible performance. We will not address proprietary operating systems and hardware architectures where these general requirements may not apply.
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