This page describes a laser engraving setting published for Acier inoxydable at 2 mm, tested on a EM-Smart Nova 2 fitted with a Fibre 30W source (1064 nm fibre, 30 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 engraving setting that works on Acier inoxydable at 2 mm does not transfer to another thickness, nor to another source. A 1064 nm fibre rated 30 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 Acier inoxydable, then adjust the speed rather than the power. Work with fume extraction and air assist, wear glasses rated for 1064 nm fibre, and never leave the machine unattended.
EM-Smart makes portable all-in-one fibre markers, some usable without a PC. They target light industrial marking: plates, tools, mechanical parts. The marking field depends on the fitted lens, and changing the lens changes energy density and therefore the setting.
Stainless steel marks with a fibre laser at a precision no other process matches: deep engraving, black marking or even colour marking, depending on the energy applied. This is strictly 1064 nm territory.
A blue diode or a CO2 will not mark bare steel: the metal reflects or dissipates the energy with no useful reaction. Only a 1064 nm fibre source is absorbed by steel.
There is a workaround: marking sprays and pastes (metal-oxide type) let a CO2 fix a black mark on steel. The result is decent but less fine than true fibre marking, and the consumable costs money.
Three regimes depending on energy: annealing at low power and high frequency gives deep black without digging, ideal for instrumentation and medical parts; engraving at high power carves a grey groove; colour marking, in between, plays on oxide layers that are extremely sensitive to the slightest drift.
On stainless, pulse frequency and pass count matter as much as power: varying them at constant power is what takes you from grey to deep black.
Annealed marking does not survive sanding but resists corrosion very well, since it does not break the passive layer. Deep engraving opens the metal: on an exposed part it can start local rusting.