Hello,

We are currently working with an off brand 40 watt ebay laser system. To date we have about 60 hours of run time on this laser at varying power levels. initially when we got the laser we did a lot of work at 100% power, since then we designated the laser for one use, this means that we run it at 20% power, pretty much all day. We are engraving (bleaching) black anodized coating on aluminum. Recently our engraving work has started to become very inconsistent, today about 25% of our parts turned out crappy and we had to toss them. Also we're hearing a fuzz/buzz sound which sounds like it is coming from the power supply and only lasts for a second when hitting the test button like in this video


Our setup:


40 watt ebay laser,


running auto anti freeze and tap water,


We engraved about 140 parts all on our 300mm/s @ 20% PWR and then today its just taking a crap on us.


What should we do?

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