Design and implementation of machine tool static error feedback model

CNC manufacturing has continuously strived to meet the increasing customer demand of quality control parts with minimum lead time. This essentially means developing CNC machine tool solutions which will result in less variation in the dimensions of manufactured products. It has been established in the recent past that static errors on a machine tool area major contributors in the overall errors for manufactured parts. The authors have proposed a feedback model to compensate the machine tool static error and provide compensated part feature positions. This model has been developed to map the static errors (as an effect of the movement in the kinematic joints of the machine tool) with the deviations in the locations of the part features. It has been then tested in a real time manufacturing environment using an industrially inspired test piece. The significant improvement in measurement results (for drilling positions) of manufactured parts shows the efficacy of the model.