I’m trying to engrave some brass coins I got from Amazon. My 30 watt laser won’t even make a mark. No matter what power level and or speed. I just tried 200 speed 100% power with no success. I tried it on Aluminum too with the same results. It’s cutting and engraving wood fine but nothing on metal. What am I missing? Please.
I don’t know anything about your machine, but if it’s a “normal” diode laser, it doesn’t have the wavelength needed to process metal.
I’d have to agree with @bernd.dk that your laser isn’t up to the job. If it’s a visible light laser, it’s unlikely to be able to actually get the material hot enough to remove any of it.
A marking spray may work, but not engraving.
Not the news I was hoping for but thank you for the answer!
Led lasers have really gone up in power. They usually only give supply/output power. Both are really needed. You need to know input power because you have to supply it properly, but most of us using these depend on output power. We don’t know how yours is rated. We don’t know if it’s 30W in or 30W out… Either is likely too little to have an effect on metals.
Besides that, most natural materials, such as wood, don’t conduct heat away for the impact point as does metals.
An LED and co2 laser is a continuous wave (cw) type, whereas a fiber (for man made materials) is a pulse laser. My 60W produces pules in the 18kW range. Although both types are lasers and operate similarly, as far as the emf field exciting the molecules, but at the material end their effect is operationally a bit different.
Hope this make sense?
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