The primary task of machine tools is simultaneously positioning and orienting the cutting tool with respect to the work piece. The mechanism must avoid positioning errors, and limit forces and torques required to the motors. A novel approach for combined design and control of manufacturing means is proposed in this work. The focus is on the optimization of the control logic of a redundant 6 axis milling machine, derived from the 5 axis milling machine by adding redundant degree of freedom to the work piece table. The new mechanism is able to fulfill a secondary task due to the introduction of redundancy. The proposed methodology sets as secondary task the minimization of the rotary motors torque, or the minimization of the norm of the positioning error. The control is based on the solution of a constrained optimization problem, where the constraints equations are the kinematic closure equations, and the objective function is the table motor torque or the positioning error of the tool tip. The implementation of this framework in the virtual machine model of the mechanism shows an improvement of the performances: actually, the introduction of a redundant axis allows the minimization of the torques and position errors.


    Access

    Download


    Export, share and cite



    Title :

    The optimization of the control logic of a redundant six axis milling machine



    Publication date :

    2021-01-01



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Classification :

    DDC:    629



    Portable 2 Axis Milling Machine for CFRP

    Richards, B. / Turnbull, C. / Society of Automotive Engineers | British Library Conference Proceedings | 2012


    Portable 2 Axis Milling Machine for CFRP

    Richards, Barry / Turnbull, Craig | SAE Technical Papers | 2012


    Milling machine control method, milling machine control system and milling machine

    HU WENGANG / LIU ZHIBIAO / ZHU ZHE | European Patent Office | 2023

    Free access