Universal Laser Systems Laser Platform M-300 Guía para resolver problemas descargar pdf (Pagina 70)

Sample Materials 7-9

BRASS - PAINTED

RASTER ENGRAVING

LASER WATTAGE POWER SPEED PPI PASS DEPTH

15 90 80 500 1 .001”

20 68 80 500 1 .001”

25 54 80 500 1 .001”

30 45 80 500 1 .001”

VECTOR ENGRAVING

LASER WATTAGE POWER SPEED PPI PASS DEPTH

15 20 4.0 1000 1 .001”

20 15 4.0 1000 1 .001”

25 12 4.0 1000 1 .001”

30 10 4.0 1000 1 .001”

COMMENTS

The manufacturing processes for coated brass varies from one vendor to another. Some

manufacturers do not polish the brass before coating it. Since CO

lasers at this power level do

not engrave into metals when the coating is removed, the tarnished brass underneath will have

a dull appearance that will need to be polished with a brass polishing compound. This type of

brass is designed for mechanical engravers that actually remove the metal when engraving

which gives the brass a shine without polishing. Brass that is produced for the laser engraving

industry is polished, then clear coated, and finally coated with paint. When laser engraving this

type of material, adjust the power so that the laser beam removes the painted coating but not

the clear coating. This will expose the polished, clear-coated brass without penetrating all the

way down to the metal. Since the brass is already clear coated and polished, it will not require

any cleanup after engraving nor will it ever oxidize. If polishing the brass, use a soft, non-

abrasive cloth or tissue (not paper towels) and good quality brass polish. Do not rub too hard,

as this will scratch the painted coating. Use ONLY enough power to remove the painted surface.

Too much power will thicken the engraved image, which washes away fine detail.

Excessive power can also cause the laser beam to reflect off of the polished brass and

go all the way back through the optics and into the laser cartridge where it can damage

the cartridge or be amplified and sent back out of the cartridge to produce a secondary

beam. This “satellite” beam most likely would be offset from the normal laser beam,

which would also engrave you material but give the appearance of a “double image” as if

two beams were engraving at the same time, but were offset slightly from each other

WARNING: DO NOT ATTEMPT TO ENGRAVE DEEPLY OR ATTEMPT

TO CUT THIS MATERIAL WITH THE LASER SYSTEM. High Power and

low Speed settings can cause the laser beam to reflect off of this material

which can damage the laser system and can be a safety hazard. Damage

caused by this type of abuse WILL NOT be covered under warranty.

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Universal Laser Systems Laser Platform M-300 Guía para resolver problemas Pagina 70