This page describes a laser engraving setting published for Delrin / POM at 2 mm, tested on a OMTech AF3555-100 fitted with a CO2 100W source (10,600 nm CO2, 100 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 Delrin / POM at 2 mm does not transfer to another thickness, nor to another source. A 10,600 nm CO2 rated 100 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 Delrin / POM, then adjust the speed rather than the power. Work with fume extraction and air assist, wear glasses rated for 10,600 nm CO2, and never leave the machine unattended.
OMTech offers a broad range of enclosed CO2 machines, fibre markers and galvo models, with many options (honeycomb bed, rotary, chiller). On CO2 units, mirror alignment quality on delivery varies: a setting that gives nothing often starts as an alignment problem, not a power one.
Delrin (polyoxymethylene) is the engineering plastic of mechanisms: rigid, self-lubricating, precise. It cuts with a CO2 leaving a very clean edge, making it excellent for gears and living hinges.
POM vaporises cleanly, without the melted burr of PP: the edge comes out crisp and matt, almost machined. A single high-power pass gives the best result.
It needs noticeably more energy than acrylic of the same thickness. On a diode the result is poor: this is a CO2 material.
Engraving has little contrast on black Delrin and gives a satin white on white: for mechanical markings, prefer a deep engrave over a light mark.
POM releases formaldehyde as it decomposes: irritant, with a sharp smell. Effective extraction is essential, and long runs in a poorly ventilated space should be avoided.
The edge needs no finishing. Delrin, however, barely glues at all: design for interlocking or screwing.