Title pretty much sums it up, I’m trying to engrave(bi-directional), and I’m getting heavy burn marks on only one side. The actual engraving looks fantastic. I’m using air assist, but I’m not sure exactly how much air to use. Everyone says the PSI they use but it’s a open ended system and no one measures their SCFMs. For this piece, I set the focus a mm above the focal point and ran 300mm/s at 30%.
I’m using a 60w laser with a Ruida 6445g, if that helps at all