TY  - JOUR
AU  - Kvrgić, Vladimir
AU  - Ribić, Aleksandar, I
AU  - Dimić, Zoran
AU  - Živanović, Saša
AU  - Dodevska, Zorica A.
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3722
AB  - The indirect identification of the geometric errors (GEs) in the rotary axis of a machine tool yields six equivalent GEs (EGEs) that are position-dependent; through an analytical proof, this study demonstrates that these errors also represent four position-independent GEs of the axis. Moreover, a novel algorithm using ball bar measurements to calculate the EGEs of a nutating rotary B-axis and a rotary C-axis is presented herein. This paper also presents a new analytical solution for the actual inverse kinematics of a nonorthogonal five-axis machine tool; this solution is used for GE compensation. The presented algorithms are implemented in a self-developed software that alters the nominal numerical control code in order to eliminate GEs. The compensation accuracy and efficiency are tested using a simulation system. The results demonstrate that the proposed compensation algorithm eliminates all identified GEs. Lastly, a cutting test executed on a machine confirms that the proposed algorithms considerably improve machining accuracy.
PB  - Elsevier, Amsterdam
T2  - CIRP Journal of Manufacturing Science and Technology
T1  - Equivalent geometric errors of rotary axes and novel algorithm for geometric errors compensation in a nonorthogonal five-axis machine tool
EP  - 488
SP  - 477
VL  - 37
DO  - 10.1016/j.cirpj.2022.03.001
ER  - 

@article{
author = "Kvrgić, Vladimir and Ribić, Aleksandar, I and Dimić, Zoran and Živanović, Saša and Dodevska, Zorica A.",
year = "2022",
abstract = "The indirect identification of the geometric errors (GEs) in the rotary axis of a machine tool yields six equivalent GEs (EGEs) that are position-dependent; through an analytical proof, this study demonstrates that these errors also represent four position-independent GEs of the axis. Moreover, a novel algorithm using ball bar measurements to calculate the EGEs of a nutating rotary B-axis and a rotary C-axis is presented herein. This paper also presents a new analytical solution for the actual inverse kinematics of a nonorthogonal five-axis machine tool; this solution is used for GE compensation. The presented algorithms are implemented in a self-developed software that alters the nominal numerical control code in order to eliminate GEs. The compensation accuracy and efficiency are tested using a simulation system. The results demonstrate that the proposed compensation algorithm eliminates all identified GEs. Lastly, a cutting test executed on a machine confirms that the proposed algorithms considerably improve machining accuracy.",
publisher = "Elsevier, Amsterdam",
journal = "CIRP Journal of Manufacturing Science and Technology",
title = "Equivalent geometric errors of rotary axes and novel algorithm for geometric errors compensation in a nonorthogonal five-axis machine tool",
pages = "488-477",
volume = "37",
doi = "10.1016/j.cirpj.2022.03.001"
}

Kvrgić, V., Ribić, A. I., Dimić, Z., Živanović, S.,& Dodevska, Z. A.. (2022). Equivalent geometric errors of rotary axes and novel algorithm for geometric errors compensation in a nonorthogonal five-axis machine tool. in CIRP Journal of Manufacturing Science and Technology
Elsevier, Amsterdam., 37, 477-488.
https://doi.org/10.1016/j.cirpj.2022.03.001

Kvrgić V, Ribić AI, Dimić Z, Živanović S, Dodevska ZA. Equivalent geometric errors of rotary axes and novel algorithm for geometric errors compensation in a nonorthogonal five-axis machine tool. in CIRP Journal of Manufacturing Science and Technology. 2022;37:477-488.
doi:10.1016/j.cirpj.2022.03.001 .

Kvrgić, Vladimir, Ribić, Aleksandar, I, Dimić, Zoran, Živanović, Saša, Dodevska, Zorica A., "Equivalent geometric errors of rotary axes and novel algorithm for geometric errors compensation in a nonorthogonal five-axis machine tool" in CIRP Journal of Manufacturing Science and Technology, 37 (2022):477-488,
https://doi.org/10.1016/j.cirpj.2022.03.001 . .

TY  - JOUR
AU  - Rakić, Aleksandar
AU  - Živanović, Saša
AU  - Dimić, Zoran
AU  - Knežević, Mladen
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3618
AB  - This paper presents an application of an open architecture control system implemented on a multi-axis wood computer numerical control milling machining center, as a digital twin control. The development of the digital twin control system was motivated by research and educational requirements, especially in the field of configuring a new control system by "virtual commissioning", enabling the validation of the developed controls, program verification, and analysis of the machining process and monitoring. The considered wood computer numerical control (CNC) machining system is supported by an equivalent virtual machine in a computer-aided design and computer-aided manufacturing (CAD/CAM) environment, as well as in the control system, as a digital twin. The configured virtual machines are used for the verification of the machining program and programming system via machining simulation, which is extremely important in multi-axis machining. Several test wood workpieces were machined to validate the effectiveness of the developed control system based on LinuxCNC.
PB  - North Carolina State Univ Dept Wood & Paper Sci, Raleigh
T2  - Bioresources
T1  - Digital Twin Control of Multi-Axis Wood CNC Machining Center Based on LinuxCNC
EP  - 1130
IS  - 1
SP  - 1115
VL  - 16
DO  - 10.15376/biores.16.1.1115-1130
ER  - 

@article{
author = "Rakić, Aleksandar and Živanović, Saša and Dimić, Zoran and Knežević, Mladen",
year = "2021",
abstract = "This paper presents an application of an open architecture control system implemented on a multi-axis wood computer numerical control milling machining center, as a digital twin control. The development of the digital twin control system was motivated by research and educational requirements, especially in the field of configuring a new control system by "virtual commissioning", enabling the validation of the developed controls, program verification, and analysis of the machining process and monitoring. The considered wood computer numerical control (CNC) machining system is supported by an equivalent virtual machine in a computer-aided design and computer-aided manufacturing (CAD/CAM) environment, as well as in the control system, as a digital twin. The configured virtual machines are used for the verification of the machining program and programming system via machining simulation, which is extremely important in multi-axis machining. Several test wood workpieces were machined to validate the effectiveness of the developed control system based on LinuxCNC.",
publisher = "North Carolina State Univ Dept Wood & Paper Sci, Raleigh",
journal = "Bioresources",
title = "Digital Twin Control of Multi-Axis Wood CNC Machining Center Based on LinuxCNC",
pages = "1130-1115",
number = "1",
volume = "16",
doi = "10.15376/biores.16.1.1115-1130"
}

Rakić, A., Živanović, S., Dimić, Z.,& Knežević, M.. (2021). Digital Twin Control of Multi-Axis Wood CNC Machining Center Based on LinuxCNC. in Bioresources
North Carolina State Univ Dept Wood & Paper Sci, Raleigh., 16(1), 1115-1130.
https://doi.org/10.15376/biores.16.1.1115-1130

Rakić A, Živanović S, Dimić Z, Knežević M. Digital Twin Control of Multi-Axis Wood CNC Machining Center Based on LinuxCNC. in Bioresources. 2021;16(1):1115-1130.
doi:10.15376/biores.16.1.1115-1130 .

Rakić, Aleksandar, Živanović, Saša, Dimić, Zoran, Knežević, Mladen, "Digital Twin Control of Multi-Axis Wood CNC Machining Center Based on LinuxCNC" in Bioresources, 16, no. 1 (2021):1115-1130,
https://doi.org/10.15376/biores.16.1.1115-1130 . .