A laser machine can make it seem as though everything happens when the beam switches on.
In reality, as with CNC machining, a large part of the work has already been completed beforehand.
The drawing must be prepared, the right method selected, power and speed adjusted, the material positioned and, very often, several tests made before the intended result is reached.
In my workshop, the laser is neither the centre of all production nor a gadget left in a corner. It is a different tool with its own possibilities and limits.
I use it for engraving, personalisation, certain jigs, cutting fine forms and experiments involving veneer and marquetry.
It is also probably one of the machines that provides the most direct transition between an idea drawn on screen and a visible result in the material.
Before the beam, there is the drawing
The laser works from geometry.
That geometry may be text, a silhouette, a vector motif or an image prepared for engraving.
But sending a file straight to the machine is not enough.
The drawing must be clean and suitable for the intended operation.
A line intended for cutting is not prepared in the same way as an area intended for engraving. A complex motif may require cleaning before use. A drawing that appears correct on screen can contain duplicate lines or unnecessary shapes that cause the laser to pass over the same area several times.
The first stage of work is therefore often invisible: cleaning the file and deciding what the machine actually has to do.
In my workflow, this preparation takes place in LightBurn.
The software organises the project, places the different operations on layers and assigns different parameters to each one.
A single piece can therefore combine engraving and cutting without applying the same settings to the entire surface.
This is where the project genuinely begins to take shape.
LightBurn: organising operations before starting the machine
LightBurn is the link between the drawing and the laser.
I use it to organise the different parts of the project before sending them to the machine.
One layer may engrave a motif, another lightly mark a reference and a final layer cut the outline.
This structure makes it possible to define a coherent order of operations.
It is usually better to decide the sequence before machining starts. A small part that is completely cut out may move, which becomes a problem if an engraving still has to be carried out on it afterwards.
As with many digital machines, the order of operations matters as much as the settings themselves.
Preparation in LightBurn also positions the drawing on the material and anticipates the real size of the result.
Work on screen remains preparation, however.
The real test always begins when the beam meets the wood.
Wood does not always react as expected
The laser moves with great mechanical consistency.
The material is much less consistent.
Two woods do not react to the beam in the same way. Their density, colour, resin content and surface condition can all alter the result.
A setting that works perfectly on one material cannot automatically be transferred to every other one.
Power and speed must be adapted.
For engraving, a balance has to be found: the mark must be readable without excessively burning the surface.
For cutting, the issue is different. The beam must pass through the material without leaving the edges exposed to heat longer than necessary.
Testing is therefore part of the process.
A small test matrix can prevent a good piece of wood being sacrificed immediately.
That is less spectacular than a video showing a laser cutting a shape in a few seconds, but it is the reality of the work: before a good engraving, there are often several more-or-less burnt squares somewhere in the workshop.
Engraving for personalisation without taking over the project
Engraving is probably the most obvious use of the laser in my work.
It adds text, a symbol or a motif without fundamentally changing the construction of the object.
I can therefore work on a piece already designed in wood and integrate a precise graphic element into it.
But I prefer the engraving to remain coherent with the project.
The laser makes it very easy to add a great deal of detail. That is not a reason to do so systematically.
On some objects, a discreet motif is enough. On others, engraving can become a genuine part of the design.
Its principal advantage is repeatability.
Once the file is correctly prepared and the settings validated, the same motif can be reproduced with great consistency.
This is particularly useful for series, reference marks, inscriptions and elements intended to be used several times.
Cutting fine shapes and preparing jigs
The laser is not only an engraving tool.
It can also cut sufficiently thin, suitable materials and produce precise shapes.
This creates several possibilities in the workshop.
I can make certain jigs, prepare silhouettes or work on decorative elements.
Cutting veneers is also an interesting avenue for marquetry.
The aim is not to replace every traditional cutting method.
The laser mainly provides another way to prepare complex and repeatable forms.
But digital precision does not remove the constraints of the material.
The beam has a cutting width. Heat can slightly alter the edges. Some species react more cleanly than others.
When several pieces must later fit together, all these parameters have to be taken into account.
The theoretical drawing is therefore only a starting point.
From hand drawing to the digital file
Not every project begins directly with a drawing produced on a computer.
A form may first appear on paper, in a sketch or in an idea drawn quickly by hand.
The task is then to transform that first intention into a usable file.
I find this transition particularly interesting.
Hand drawing has a freedom that software does not always offer. Digital tools, on the other hand, can correct a curve, repeat an element or adjust a dimension precisely.
Moving from one to the other does not simply mean reproducing a line faithfully.
The form may need to be simplified, cleaned or rebuilt so that it works correctly with the machine.
The laser then becomes the final stage of a chain that began much earlier.
The idea is drawn, reconstructed, prepared and finally materialised by the beam.
Another way of approaching creation
The laser has one particular advantage over many other workshop machines: an idea can be tested very quickly.
A small silhouette, pendant, decorative element or motif can be prepared and tried without immediately committing to a long manufacturing process.
That also makes it a space for experimentation.
I sometimes use it simply for the pleasure of creating small forms or exploring an idea that is not intended to become a product.
That freedom matters in a workshop.
Not every hour spent on a machine has to result in a series or a product page.
Some experiments exist only to understand a possibility.
With suitable protection and supervision, the laser can also be an interesting tool for explaining the principles of digital design and computer-aided manufacturing to younger people.
The link between the drawing on screen and the result that appears shortly afterwards is particularly easy to understand.
Even in that playful context, however, safety rules remain inseparable from the use of the machine.
CNC and laser: two digital tools, two different logics
CNC machines and lasers are sometimes grouped together under the label of digital manufacturing.
In practice, their working principles are very different.
A CNC removes material mechanically with a cutter. It can work in depth, create pockets, drill and produce three-dimensional forms.
The laser works without mechanical contact. It is especially effective for engraving, precise graphics and cutting suitable, sufficiently thin materials.
The two machines nevertheless share an essential point.
The quality of the result depends heavily on the digital preparation completed before the machine starts.
For CNC work, I move between Fusion 360 and MillMage according to the project.
For the laser, LightBurn occupies that central position between the file and the machine.
The programs and movements are different, but the learning process is similar: understand the tool, understand the material and understand the link between what is drawn on screen and what will really happen in the workshop.
What the laser changed in the way I work
Above all, the laser taught me to look differently at simple drawings.
A line on a screen can become an engraving, a cut or merely a reference mark.
To obtain the right result, however, its role must be decided before the machine is switched on.
That is probably what interests me most about digital tools.
Their precision is obvious, but precision alone is not enough.
The software does not select the right wood. It does not decide whether an engraving is too strong. It cannot tell whether a motif is unnecessarily busy or whether a line should be removed.
The beam executes the project.
The work is still knowing what to ask it to do.
In the workshop, the laser has therefore become a complementary tool: highly accurate when a motif must be reproduced, but also quick enough to test, modify and begin again.
Between the first line and the final trace of light on the wood, there remains a great deal of room for human decisions.