Laser Engraving Suggestions and Tricks

Laser Engraving has modified dramatically over the past decade or so. After I began working in this trade, should you needed to have a laser at your factory or shop you need to have THREE THINGS: Highly Trained Personnel, Persistence and very DEEP pockets.

Previously 10-years or so, computing power, strong-state lasers and deployment of systems has introduced the costs down significantly, the required skill set to own and operate a system may be very low and system maintenance has turn out to be severely simplified.

So, let’s get to the meat of this Article.


1. First and Foremost, have the correct Wavelength!

The Wavelength of the laser is critical to part marking.


For instance, As an example your main business is custom firearms. Most individuals start with a simple CO2 laser having a Wavelength of 10,600nM. These are low-price, low-barrier systems meant for engraving and marking the ORGANICS. Wood, Paper, Glass and Stone to name a few. A CO2 is a GREAT choice for engraving and marking the Wood Butt Stocks and Polymer Grips, but is not going to do a lot in the way of engraving the metal portions of the firearm.


As a way to successfully mark and engrave with any depth in metals, we have to change wavelength. Right here, the appropriate wavelength for MOST common metals is about 1uM. Why do I say about? Simply put, there’s a number of variations for the 1uM laser, commonly clumped collectively because the ubiquitous “YAG”. In reality, the YAG is the Nd:YAG with a central emission of 1,064nM. But then there is the Nd:YVO4, the Nd:YLF and the mainstream FIBER laser with it’s proprietary glass-doped acquire medium. Each of these lasers are 1uM lasers, however have slightly different wavelengths from 1,064nM, 1,057nM, 1,070nM and such. Additionally, every has different pulse traits and that may play a major function within the proper selection.

2: Why does Lens Choice matter?

You’ll be surprised at how many times I’ve to clarify optics to people. It’s a fundamental and required step in selecting the best instrument for the job and there’s a very core element everyone ought to understand. SPOT SIZE!


The Spot measurement of a laser is critical. Let me just repeat that. The Spot measurement of a laser is critical! Merely put, you need a certain quantity of energy to do work. Keep in mind as kids when a few of us would take a magnifying glass outside and burn things? Keep in mind how as we discovered focus, the wood would just start to smolder, and because the spot grew to become smaller and smaller near the focus the wood would really start to char and burn? And as we went too close, the spot would develop again and the burning stopped? That may be a GREAT demonstration of fluence. Fluence is a term which equates within the easiest understanding of Energy for a given Area.

In our instance above, the Sun’s energy was fixed (unless a cloud passed by). We adjusted the Energy/Unit of Space by focusing the lens to it’s tightest focus. In case you think a couple of pizza. If you happen to get a Massive versus a Small pie, the diameter might double. As an example a Massive is 20″ diameter and a Small is 10″. But you do not get twice as a lot, you actually get quite a bit more because if the diameter doubles, the AREA goes up by a factor of 4!! This is the same for the laser. If we HALF the spot-measurement we INCREASE the energy density not by twice, but by a factor of four!!

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