4.3 The Marking Head
Two movable mirrors are located inside the marking head. They deflect the laser
beam vertically and horizontally according to the current template.
The X and Y axes of the coordinate system of the marking field are defined by the
position of the marking head. A translation or rotation of the marking head also
translates or rotates the axes of the coordinate system. X and Y axes in relation
to the marking head are defined as displayed in the following figure:
4.4 The Marking of the Product
Surface
The marking of the product surface is performed by the effect of intense laser ra-
diation on the product material.
The laser beam is focussed onto the product surface and heats up the topmost
layer of the material, which causes a color change or a vaporization of the top-
most dye layer.
The symbols and characters which shall be marked on the product are subdivided
into vector strokes (1). Each vector stroke is again subdivided into smaller vec-
tors.
When the laser beam jumps from one stroke to the next (2) the laser is switched
off and the product is not marked.
4.5 The Laser Parameters
Parameters are used to adapt the laser system to different materials. These pa-
rameters have to be determined and adjusted for each application in order to ach-
ieve the best possible marking quality.
09/17 - Index: AD [EN]
26
Videojet 3140/3340/3640/4 Description of the Laser System
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