Numerically Controlled Device and Numerical Control System

An NC device controls a position of a tool (205) by driving a plurality of waves by several servo motors (116b, 116y). The shafts include at least one chuck (202) which can be mechanically clamped or not clamped. A Einspannbestimmungseinheit (105) determines a state of the chuck (202) and outputs a signal based on the state of. A correction unit (112) corrects a position command value or a position detection value of at least one shaft, with the exception of the chuck (202), based on the signal, and a correction value, so an error in the position of the tool (205) as a result of movement of the tool (205 ) compensate that of the chuck (202) is performed.