RT Journal Article
SR Electronic
A1 Madaj, Rudolf
A1 Vereš, Matúš
A1 Kohár, Róbert
A1 Weis, Peter
A1 Šulek, Filip
T1 Overcoming Rotary Mechanism Limitations in CNC Machines: A 3-PRS Approach
JF Manufacturing Technology Journal
YR 2025
VO 25
IS 4
SP 500
OP 510
DO 10.21062/mft.2025.050
UL https://journalmt.com/artkey/mft-202504-0005.php
AB This paper presents the design and analysis of a 3-PRS mechanism for positioning cutting heads in CNC machines, addressing limitations of traditional rotary mechanisms such as hose twisting, wear, and limited modularity. Kinematic and dynamic analyses guided actuator selection and confirmed bearing durability. The mechanism achieves a favourable load-to-weight ratio and integrated Z-axis movement, making it suitable for simpler gantry CNC machines. Though programming is complex due to multiaxis synchronization, the modular design supports easy adaptation to different tools. Future research will focus on reducing the eccentric torch offset and refining dimensions to enhance versatility. The mechanism has strong potential in sectors like automotive, aerospace, and construction.