Tumbler looking black or burnt

Tumbler coming out dark and blacks. Almost like they’re burnt but my power setting is 20 on a 90 watt laser

How are you applying air to the cut?

Using about half way.

Not sure what that means. Try to get as much air as you can directly on the cut where the beam is cutting. Another reason why wood gets black and charred is going way to slow. The beam kind of backs up if it lacks power to cut through.

A picture is very useful to us…

A power level alone is not much to go on. There is speed and how your are doing the tumbler, vector or image scan…

I do a fill on a coated mug at 300mm/s @ 13% on my 50 watt OMTech…


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