Laser Engraving Machines Process and Methods

 In general sense or very simple terms, Laser engraving is the method of using a convergent laser beam to etch on the surface of an object, on the other hand Laser marking method of marking or printing on the surface of an object. This process sometime may include or involve, colour change, charring, foaming, melting, ablation, and so on. Technically speaking, in laser engraving microscopic layers of the material surface is precisely removed wherever needed, thus crafting visible inscription on the surface, where a convergent laser beam of a specific point is made use, to remove or make a marking on the material surface by focussing it accurately on the desired area. While different materials react in a different way to the laser actions.

Therefore, a variety of techniques must be incorporated to achieve the desired output. The mechanism of action is primarily ablation or an action similar to chipping off on harder surfaces, where in the focused laser beam extricates minute bits on the surface thereby creating the desired effect. Whereas in laser marking, the process of removal of the surface layer is usually thinner.

The action of laser engraving and marking is usually carried out sophisticated machines called laser engraving machine, or laser engraver. Although there is not much difference in laser engraving and marking excepting the depth of marking or inscribing, depending on the action they are referred to a laser marking machine or a laser engraving machine. But however, the basic technology used is more or less the same.

The machine basically consists of three main parts: a laser, a beam controller, and a surface. The laser basically is a drawing tool; the beam emitted from it lets the controller to trace outlines onto the surface wherein the controller defines the track, intensity, and the speed of movement, and spread of the laser beam. Owing to this flexibility, various patterns can be engraved by adjusting the controller to traverse on a particular path.

The trace of the laser beam is regulated accordingly to achieve a constant removal depth of the surface layer. While following certain sensible procedures, crossed paths of the laser beam are evaded to ensure that each etched surface is exposed to the laser only once, so that only the required amount of surface material is removed. The same way changing the intensity and spread of the beam allows more flexibility in creating the desired design.

Engraving machines are mainly of three categories. The X–Y table, in which the material surface is kept stationary and the laser, moves in two dimensions. In the second type, which is mainly intended for working on cylindrical objects, in which, the laser traverses a helix. In the third variety, both the laser and material surface are stationary and galvo mirrors move the laser beam over the surface.

However, in case of varied surfaces that differ in height or thickness, more sophisticated focusing mechanisms will be made use of like dynamic auto focus systems where in the parameters in real time to adapt to the changes of the material during the process of engraving. In some instances, the height and depth of the material surface is checked with devices which make use of ultrasound, infrared, and even visible light pointed at the engraving surface, which are referred to as pilot lasers assist in determining the optimal spot to focus and eliminate the unwanted areas in the material surface effectively.

While speaking about the advantages of laser engraving or marking over the other similar process, the basic advantage is that the process is ideal for producing high-precision works on a wide range of material surfaces. The most intricate and complex graphics can be created with accuracy and precision, small-scale illustrations or vectors, single point fonts can be executed without any major issues in drawings.

This process can be applied to almost each and every sector and industry, such as electronic and communication products, IC products, precision parts, hardware tools, instruments, appliances, Jewellery, garments, sanitary ware dishware and many more without any hassle. Another major benefit of the laser marking is that it is a permanent marking highly resistant to acid, abrasion, and varied temperatures. At the same time, low power consumption and very less maintenance costs are also its key advantages. Many reputed manufacturers and sellers of laser machinery are accessible in the current market.

One among them is the Signvec, a cut above the rest of the competitors the company has been in the mentioned sector since the last two and a half decades. With a vast experience in laser equipment and its technology, Signvec has a range of laser machine that it markets. Their products range from the higher end spectrum to the more affordable less expensive range. With an intention to provide laser machines of superior quality the company has been an authorised distributor for Universal Laser Systems, Vision Engraving & Router Systems, Signvec Engravers, Router, Laser Systems as well as engraving materials for the entire South East Asia region. Also efficient and consistent in after-sales service the company offers second to none services in the sector.

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