The paper shows the development of a 3-axis CNC machine tool for rapid prototyping by subtracting materials, with two translational and one rotating axis, whose control is based on the LinuxCNC system, with an integrated virtual machine as a digital twin. The concepts of machines with one rotary axis were analyzed and the concept of a machine for realization was adopted, which is completely configured in a CAD/CAM environment. For successful verification of the programming system, a virtual machine has been configured in the CAD/CAM system, as well as in Vericut. The final validation of the machine design was achieved by its trial work on characteristic examples.

U radu je pokazano konfigurisanje sistema za programiranje i upravljanje jedne realizovane koncepcije troosne mini CNC mašine alatke čije je upravljanje zasnovano na Raspberry Pi platformi koristeći Machinekit upravljački softver. Za potrebe verifikacije sistema programiranja konfigurisana je i virtuelna mini CNC mašina alatka, u sistemu za programiranje, u različitim pogodnim okruženjima. Verifikacija programiranja je ostvarena na konfigurisanoj virtuelnoj mašini koja radi na osnovu zadatog programa i iscrtava programiranu putanju alata. U radu je predstavljeno konfigurisanje i implementacija upravljanja na Raspberry Pi platformi za mini CNC mašinu alatku, čija je verifikacija realizovana probnim radom mini CNC mašine alatke.

The paper presents the configuring of a virtual prototype BiSCARA robot generated on the basis of a fully developed kinematic model of the robot. The virtual CAD model developed in this way will enable its implementation in the Python graphical environment as an integral part of the open architecture control system developed on the basis of the presented kinematic model. The developed kinematic model included solving the inverse and direct kinematic problem, determining the Jacobian matrix and workspace analysis. Verification of the kinematic model, i.e. the configured virtual prototype of the robot, was performed by simulations of the end-effector tip movement according to the given program in a CAD / CAM environment.

S. ŽIVANOVIĆ i dr.JEDNA STONA REKONFIGURABILNA MAŠINA ALATKA SA... TEHNIKA -MAŠINSTVO 64 (2015)

The specific needs of customers set requirements like flexibility and custom-made products, as well as quick placement of products on the markets. Mass customization responds to these requirements and imposes new demands inside manufacturing systems such as optimization and virtualization of machining and measurement processes. A contribution in that direction is presented in this paper, pertaining to development and verification an on-machine measurement planning model. The aim of the verification is to visualize collision check between the measuring head placed in the tool holder and the workpiece on the machine tool working table. The virtual on-machine measurement was realized on the configured virtual machine tool LOLA HBG80 in the CAD environment. The measurement path is generated by a new planning methodology, then optimized using ants colony, programed and verified by simulations through few examples of standard forms of tolerance. The output of the simulation process is the G-code for real on-machine measurement for prismatic parts of medium and rough dimensional accuracy.