Variable Spot Technology for fiber laser cutting machines is one of the latest innovations in the laser cutting world, and it is included in certain cutting heads installed on TCI Cutting machines.
Physically, this optical system consists of a lens located within the cutting head, moving along the Z axis (or vertical axis). It works similarly to the optical zoom of a camera.
The effect of the variable spot technology is the ability to focus energy (the laser beam) into a point of greater or smaller diameter onto the cutting surface.
For cutting thin materials a smaller focussed point, or spot size, is used to increase cutting speeds, while for processing thicker materials, a larger spot size is required.
The changes in the spot size do not cause any deviation in the dimensional tolerance of the pieces cut by the fiber laser cutting machine, since the cutting software sets this parameter (offset, kerf width) depending on the thickness of the material.
In short, variable spot technology provides higher productivity and better quality.