It is a well know paradigm of modern production strategy to gain product quality by safely controlled technologies rather then by post-process selections of faulty products. Mastering any sophisticated process technology necessarily relies on more or less sophisticated on-line monitoring or closed loop control means.

The basis for reliable on-line process monitoring systems are significant indicators for the instantaneous condition of the interaction zone and/or neighbouring areas.

In the following presentation first attempts of process monitoring methods for laser cladding are discussed.

The presentation will focus on the comparison between different sensor technologies as regards to the current state of the art, which means on the one hand photo diode based sensors and on the other hand camera based sensor technology.

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