Abstract: An automatic rectifying system for machine tools includes a carrier platform, a contact type probe, a control device and a driving mechanism. The carrier platform may carry a work piece and a calibrator. The contact type probe is fitted to a main axle. In use, the contact type probe may touch the calibrator. The position of the calibrator corresponds to at least a trigger parameter so as to define a reference point. Such trigger parameter is fed to the control device. Then, the control device generates a control signal. Next, the control signal is fed to the driving mechanism, which in turn may move the carrier platform to offset the displacements or deviations of the carrier platform.

Abstract: A multi-layered tool magazine of a CNC machine having multiple specifications and fast tool-changing speed, includes a racket connecting to the CNC machine and being disposed with more than one set of tool magazine modules, a tool selecting module and a tool changing module. The tool changing module includes a tool selecting disk disposed with two tool selecting portions at both ends thereof respectively, and the tool selecting disk can move up and down corresponding to the tool magazine module. Furthermore, the tool changing module includes a tool changing rod disposed corresponding to the shaft of the CNC machine and a positioning point of the tool selecting module; therefore, it can increase the number of tools of the tool magazine and prepare the tools for the next process quickly in advance to exchange the tools with high speed and to further enhance the processing efficiency.