Title: Feedback control of Selective Laser Melting using optical sensors
Authors: Craeghs, Tom
Bechmann, Florian
Berumen, Sebastian
Kruth, Jean-Pierre #
Issue Date: Sep-2010
Host Document: Proceedings of LANE vol:2 pages:506-514
Conference: LANE edition:2010 location:Erlangen date:21-24 September 2010
Abstract: Selective Laser Melting (SLM) is a layerwise production technique enabling the production
of complex metallic parts. Thin powder layers are molten according to a predefined scan pattern
by means of a laser source. Nowadays constant process parameters are used throughout the
build, leading for some geometries to an overly thick feature size or overheating at downfacing
surfaces. In this paper a monitoring and control system is presented which enables monitoring
the melt pool continously at high speed throughout the building process. The signals from the
sensors can be incorporated in a real-time control loop, in this way enabling feedback control
of the process parameters. In this paper the experimental set-up will be first shown. Next the
dynamic relation between the melt pool and the process parameters is identified. Finally the
proof of concept for feedback control is demonstrated with experimental results.
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Production Engineering, Machine Design and Automation (PMA) Section
# (joint) last author

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