High precision automatic tool-set method for grinder

The tool-set accuracy and maneuverability are the key factors which impact the processing precision and efficiency of CNC grinding machines. Pointing at the shortage of the study on this field, we raise a method of two-stage feed that combines electric detecting and instantaneous power detecting. In the backward stage, which determines the accuracy of tool-set, the model based on instantaneous power detecting-Park converting model is used to detect the values of three-phase instantaneous power of the sampling points at every other half grid cycles. The weighted judging formula is set up to judge whether the two sets of data suit the formula and count at every half grid cycle when they suit the formula. If the counting value gets to the set value, we consider the tool-set has finished. The precision of this method improves at least one time comparing with other method based on detecting power of the spindle motor. This method has advantages of easy operability ,good reliability and high precision.