Laser engraving on hardwood

Hello!

Brand new user here. I’m up and running on my 2.0 (w/1600mW laser) and hope for some advice on my first project. I’m planning to laser engrave some vector images onto solid maple drink coasters. Hoping for a finished depth of 1-2mm. So far, I’m getting clean lines but very little depth. Does anyone have much experience working with laser engraving on hardwood and could offer some setting suggestions?

Much appreciated!

Steve_

Do you try more passes? It might help.