As we all know, laser cutting machine cutting sheet metal has an unparalleled advantage, not only cut high precision and smooth section without burr, whether it is cutting thick plate or sheet can achieve good results, however, these effects are with the laser cutting machine The focus of control is not off the relationship, just like SLR camera focus, to achieve better imaging results is a principle.
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In the application of high power laser pointer cutting to get up early, the main way to focus is to rely on manual to complete, and now with the development of laser technology, this manual focusing method has gradually phased out, auto focus has slowly begun to achieve, Laser full range of laser cutting machines are equipped with fully automatic focus function. Well, some people will say that the optical path is integrated in the cutting head inside, by changing the height of the cutting head is not to achieve focus function? The cutting head is raised, the focus position is high, the cutting head is lowered, and the focus position is low.
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Cutting head at the bottom of the nozzle, in the cutting process, the nozzle and the distance between the workpiece (nozzle height) of about 0.5 ~ 1.5mm, may wish to be seen as a fixed value, the nozzle height unchanged, it can not lift the cutting head to adjust Coke (otherwise can not complete the cutting process). The focal length of the focusing lens is unchangeable, and therefore can not be expected to focus by changing the focal length. If you change the position of the focus mirror, you can change the 300mw laser focus position: Focus lens down, the focus down, focus lens up, the focus increased. - This is indeed a way of focusing. Using a motor-driven focusing mirror for up and down movement, can achieve automatic focusing. Another method of autofocusing is to change the position of the focal point by changing the curvature of the reflecting mirror and changing the angle of divergence of the reflected beam before the beam enters the focusing mirror, by setting a variable curvature mirror (or tunable mirror).

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With auto-focus function, in the processing of different materials, different thickness of the workpiece, the machine can automatically focus to quickly adjust to the most appropriate location. This can significantly improve the laser cutting machine processing efficiency, plate punching time will be substantially reduced. Therefore, the 50mw green laser cutting machine, the auto-focus function is an important and indispensable function.