Abstract: A method includes steps of: performing preparation-phase measurements on a spindle of a machine tool to generate normal-condition signals; establishing a reference model based on the normal-condition signals; generating abnormal-condition signals based on the reference model and a preset damage value; utilizing principal components analysis (PCA) to characterize the normal-condition and abnormal-condition signals to obtain normal and abnormal probabilistic models, determining normal-condition and abnormal-condition reference curves based on the normal and abnormal probabilistic models; determining an alert-triggering line based on the abnormal-condition reference curve; determining a permissible range between the alert-triggering line and the normal-condition reference curve; and generating a warning signal when it is determined that a detection value falls outside of the permissible range, wherein the detection value is obtained based on application-phase measurements performed on the spindle.

Abstract: A measuring unit is used to measure a specific dimension of a product feature within a time segment to generate a measured dimension value. A processing unit compares the measured dimension value with a standard dimension value to generate an offset value. A control unit generates a control instruction based on the offset value, and transmits the control instruction to a machine on which machining member that is used to form the product feature is installed, so that the machine performs tool compensation on the machining member according to the control instruction.

Abstract: A mini cutting bit includes a shank and a cutting part. The cutting part has a first spiral portion and a second spiral portion parallelly and twistedly formed thereon. The cutting part further has two chip removal flutes between the first and the second spiral portions. The first spiral portion has a first chip breaking flute on a top thereof while the second spiral portion has a second chip breaking flute. Widths of the first and the second chip breaking flutes are smaller than that of the tops of the first and the second spiral portions respectively.

Abstract: A mini cutting bit includes a shank, a cutting part and a bit tip, wherein the cutting part has opposite ends connected to the shank and the bit tip. The bit tip and the cutting part are made of different materials, and the bit tip is harder than the cutting part.

Abstract: A method for monitoring a hydrostatic bearing that is in operation is provided. Frequency domain analysis, time domain analysis and principal components analysis are performed on an operation signal that results from the operation of the hydrostatic bearing, so as to build a Gaussian mixture model. Then, based on a difference between the Gaussian mixture model and a predetermined reference model, an operation state of the hydrostatic bearing can be determined in real time.

Abstract: A method for inspecting normality of a spindle of a machine tool is provided. Spectral analysis, time domain analysis and principal components analysis are performed on a vibration signal that results from the vibration of the spindle, so as to build a Gaussian mixture model. Then, based on a difference between the Gaussian mixture model and a predetermined reference model, whether the machine tool is operating normally can be determined in real time.

Abstract: An environment monitoring system includes N sensors, a server and a monitoring device, where N?3. The sensors respectively generate multiple pieces of sense data related to a monitoring area. The server determines whether at least three of the pieces of sense data are abnormal, and generates position data based on the at least three pieces of abnormal sense data when the determination is affirmative. The monitoring device includes a body that is movable in the monitoring area, an image capturing module and a control module. The control module controls the body to move to a position corresponding to the position data, and the image capturing module captures an image at said position.

Abstract: A self-balancing line shaft of a machine tool includes a spindle device, a cutter tool holder and at least one balancing assembly. The spindle device includes a spindle extending along and rotatable about an axis, and at least one precision lock nut threadedly engaged with and rotated with the spindle. The cutter tool holder is coaxially connected and rotated with the spindle. The balancing assembly includes an annular groove formed in one of the precision lock nut and the cutter tool holder and extending along a circle path surrounding the axis, and a plurality of weight members disposed in the annular groove to be moved in a direction opposite to a rotation unbalance during rotation of the spindle such that the center of mass of the whole rotating system is close to the axis.

Abstract: A self-balancing line shaft of a machine tool includes a spindle device, a cutter tool holder and at least one balancing assembly. The spindle device includes a spindle extending along and rotatable about an axis, and at least one precision lock nut threadedly engaged with and rotated with the spindle. The cutter tool holder is coaxially connected and rotated with the spindle. The balancing assembly includes an annular groove formed in one of the precision lock nut and the cutter tool holder and extending along a circle path surrounding the axis, and a plurality of weight members disposed in the annular groove to be moved in a direction opposite to a rotation unbalance during rotation of the spindle such that the center of mass of the whole rotating system is close to the axis.

Abstract: A wet grinding and dispersion apparatus includes a grinding chamber, a shaft, and a grinding wheel unit. The shaft is disposed rotatably in the grinding chamber. The grinding wheel unit is disposed in the grinding chamber, is mounted to rotate with the shaft, and includes a plurality of grinding wheels, each of which has opposite wheel surfaces. Each of the wheel surfaces is formed with stirring protrusions.