Celerius is the first Italian 5 axes PKM (Parallel Kinematics Machine) designed for milling operations.
The machine is the outcome of ITIA-CNR's research activities under the PNR-SPI Program (National Research Program for Innovative Production Systems), promoted and financed by the Italian Ministry of Research (MIUR).
The SPI1 Project was focused on innovative methodologies based on functional modularity for the realization of mechanical workstations easy to integrate and to adapt to different jobs.
The main aim of the project was the development of a prototype for a PKM workstation.
Nowadays, the PKM technology is mature for machining of light materials (wood, resin, composite material, plastic). In order to test the parallel kinematics machines to their limits, a module for semi-roughing, finishing and super-finishing of steel and aluminium alloy components for aeronautical, mould manufacturing and precision mechanics sectors was built. The technical and structural features of this PKM prototype had been designed with the explicit aim to test the performances of the PKM technology in highly challenging tasks.
It was therefore necessary to carry out an in-depth and thorough analysis that allowed to identify the shape and the material of the working pieces, which had to be characterized by tough geometrical and dimensional tolerances and roughness and tortuousness of the surfaces.
Celerius is a pure parallel architecture machine. The six-controlled axis of the legs allow a 5-axis machining. The spatial arrangement of these movable components is the result of in-depth kinematics studies aimed at guaranteeing the achievement of desired performances in terms of working space, speed and acceleration of the axis.
The module is equipped with a 20 kW and 24.000 rev/min electrospindle capable to machine all the materials in the related sectors of application: from the steel for mould to the light aluminium alloys for aeronautical applications. One of the main outcome of the Celerius is that it constitutes the practical demonstration of the high level of development reached by the parallel kinematics technology to date. This opens a new perspective on the role of PKMs in the industrial applications of the near future.

Celerius is a result of the ITIA-CNR activities concerning the PKMs (Parallel Kinematic Machines) launched in 1995 with the conception and development of the first PKM prototype called Acrobat. These activities were followed up by the development of Dragon Fly² and PKM 3x, installed as prototypes in subsidiaries of the Zanussi group. In 2000, ITIA designed and built the Dragon Fly PKM that is now installed in the Vigevano plant for the roughing and cementing of shoe upper bottom.
Celerius was on display at the ITIA-CNR Stand during the BIMU 2002 (Machine Tools, Robots, Automation).

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