COLOUR MARKING METAL SURFACES

摘要

Apparatus related to marking a metal surface are provided. The solution includes a bed for an object including a metal surface, the bed including a total marking area; a cover forming an airtight space over the bed; one or more laser marking units capable of directing a laser beam onto the metal surface located within a unit marking area, wherein the unit marking area is smaller than the total marking area. In the proposed solution control data including information on the marking of a pattern on the metal surface is received; the focus, bandwidth and movement of the one or more laser marking units is controlled on the basis of the control data to produce the pattern defined in the control data on the metal surface.