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Publication - Mr Carwyn Ward

    A comparison of FDM structural layouts and implementation of an open-source arm-based system

    Citation

    Pollard, D, Herrmann, G, Ward, C & Etches, J, 2018, ‘A comparison of FDM structural layouts and implementation of an open-source arm-based system’. in: 2018 3rd International Conference on Mechanical, Manufacturing, Modeling and Mechatronics (IC4M 2018) – 2018 3rd International Conference on Design, Engineering and Science (ICDES 2018). EDP Sciences

    Abstract

    Fused Deposition Modelling (FDM) is a manufacturing process to build components in a layer-by-layer approach through extrusion of polymers from a movable nozzle, allowing for significantly higher degrees of complexity over machined parts. Current FDM systems typically use actuation provided through a gantry or delta structural layout, operating through depositing successive planar layers in a 2.5D process; it has been shown in numerous studies the bonding between layers has significantly lower strength than the homogeneous material or in-plane properties - an issue which can be mitigated through the deposition of curved layers. This paper compares four differing structural layouts of FDM systems (gantry, delta, Stewart Platform, and arm-based) to identify the key advantages of an arm-based method as the increased workspace and manipulability enabling “Additive Finalisation” of components, and suitability for curved layer FDM. Details are then presented of the open-source implementation and evaluation of a 6 degree-of-freedom arm-based FDM printer at the University of Bristol.

    Full details in the University publications repository