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Main drive and feed drive of CNC lathe

There are great similarities in the structure and process of machining objects, but there are also great differences due to the existence of CNC system. Compared with ordinary lathe, CNC lathe has the following characteristics:
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Numerical precision and equipment backlash

Within the numerical systems of CNC programming it is possible for the code generator to assume that the controlled mechanism is always perfectly accurate, or that precision tolerances are identical for all cutting or movement directions.
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Tool / machine crashing

Many CNC tools have no inherent sense of the absolute position of the table or tools when turned on.
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