This page describes a laser cutting setting published for Coton / Denim at 1 mm, tested on a ACMER S2 Pro fitted with a Diode 48W source (445 nm blue diode, 48 W). It states the exact machine, source, material, thickness and operation of the test; power, speed and number of passes are shown with a Premium pass.
Why those four facts matter: a cutting setting that works on Coton / Denim at 1 mm does not transfer to another thickness, nor to another source. A 445 nm blue diode rated 48 W does not deposit the same energy as a stronger module, and the speed has to be adjusted accordingly. Copying a number without checking those four points is the first cause of a ruined part.
Published by LaserSettings (estimation). No other workshop has confirmed it yet: treat it as a starting point, and confirm it from your account if you reproduce it.
No photo comes with this setting yet. If you reproduce it, publish yours from your account: a picture of the result is worth more than a line of numbers.
Recommended routine before running the part: clean the lens, redo the focus, engrave a small test grid on an offcut of the same Coton / Denim, then adjust the speed rather than the power. Work with fume extraction and air assist, wear glasses rated for 445 nm blue diode, and never leave the machine unattended.
ACMER builds open-frame diode engravers with built-in air assist and swappable modules: the same frame can take a fine engraving module or a more powerful cutting one, and some models accept an infrared head for metal marking. Settings published for an ACMER therefore depend on the fitted module rather than the frame model.
A laser does two very different things on cotton: cut pieces with clean edges, and above all bleach denim to create patterns — an effect impossible to achieve otherwise at this level of detail.
The principle is not to burn but to remove indigo from the surface of the yarn. At very low power and high speed the laser lightens the fabric without damaging it: you get a photographic gradient, adjustable through power alone.
Always run a test gradient on an offcut of the same garment: two jeans of the same apparent colour react differently depending on dye and washing.
On a garment, keep the fabric taut and the focal distance constant: a single fold creates a darker patch in the middle of the pattern.
Cotton cuts at very low power. The edge is not heat-sealed as on synthetics: it will fray, so plan a seam or hem.
Fabric shifts and lifts even more easily than paper. A heavy frame, magnets or temporary adhesive backing are essential for an accurate cut.
Beware of water- or stain-repellent treated fabrics: the treatment is sometimes a fluorinated or chlorinated compound of unknown composition.