Dynamic models relating processing parameters and melt track width during laser marking of clay tiles

✍ Scribed by A.A Peligrad; E Zhou; D Morton; L Li

• Book ID: 104159668
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 374 KB
• Volume: 34
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(01)00100-1

✦ Synopsis

This paper describes two dynamic models relating processing parameters and melt pool width during laser marking=engraving of clay tiles using a high-power diode laser. The models were determined by process identiÿcation techniques and were validated with a PI algorithm. The output variable considered for the laser clay tile marking process was melt pool width, measured by using a fast CCD recording system and analysed with an image-processing software. The input quantities investigated were laser power and traverse speed. Reasonable agreements between the measured data and the model outputs were achieved. Errors less than 1:3 m of the melt pool width for the operating points were found. On the basis of these models a simple PI-controller was designed and tuned to guarantee zero steady-state error in case of an absorptivity disturbance.