Working Paper Article Version 1 This version is not peer-reviewed

A Three-tier Redundant Architecture for Safe and Reliable Cloud-based CNC over Public Internet Networks

Version 1 : Received: 27 May 2019 / Approved: 28 May 2019 / Online: 28 May 2019 (10:25:13 CEST)

A peer-reviewed article of this Preprint also exists.

Journal reference: Robotics and Computer-Integrated Manufacturing 2020, 62
DOI: 10.1016/j.rcim.2019.101880


Cloud-based CNC is an emerging paradigm of Industry 4.0 where computer numerical control (CNC) functionalities are moved to the cloud and provided to manufacturing machines as a service. Among many benefits, C-CNC allows manufacturing machines to leverage advanced control algorithms running on cloud computers to boost their performance at low cost, without need for major hardware upgrades. However, a fundamental challenge of C-CNC is how to guarantee safety and reliability of machine control given variable Internet quality of service, especially on public Internet networks. We propose a three-tier redundant architecture to address this challenge. We then prototype tier one of the architecture on a 3D printer successfully controlled via C-CNC over public Internet connections, and discuss follow-on research opportunities.


Cloud manufacturing, Computer Numerical Control (CNC), Control as a Service, Cyber-physical system


ENGINEERING, Industrial & Manufacturing Engineering

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