Patent ID: 8598827
Filing Date: 2013-12-03
Classification: B23C,G05B,H02P

Abstract:
1. A control system of a milling machine, the milling machine having an overarm, a spindle extending rotatably through the overarm and connected to a cutter, a spindle motor for driving rotation of the spindle, and an X-axis motor, a Y-axis motor and a Z-axis motor for driving movement of the overarm along the X-axis, the Y-axis, and the Z-axis, respectively, said control system comprising: a vibration sensor to be mounted on the overarm detecting a vibration level of the spindle and for generating a vibration signal; and a central control unit coupled electrically to said vibration sensor to receive the vibration signal from said vibration sensor, said central control unit being configured to be coupled to and to receive a load current of at least one of the spindle motor, the X-axis motor, the Y-axis motor, and the Z-axis motor, wherein said central control unit is configured to adjust a rotation speed of at least one of the X-axis motor, the Y-axis motor, and the Z-axis motor to bring the load current received by said central control unit to be within a corresponding current range, and wherein said central control unit is configured to adjust a rotation speed of the spindle motor to bring the vibration level to be within a vibration range; wherein the vibration range and the corresponding current range are configured based on a reference cutting speed of the spindle motor and a reference feeding speed of at least one of the X-axis motor, the Y-axis motor and the Z-axis motor, said control system further comprising a parameter database coupled to said central control unit and from which said central control unit acquires each of the vibration range and the corresponding current range.