Engraving with Displacement maps I want to engrave a drawing into a mesh.

I UV unwrapped the mesh exported the UV layout and textured it.



Now I don't know how I can get it into the displacement of the material. I already changed the displacement do Displacement Only but when I plug the texture into the height of a Bump Node which is connected to the displacement everything goes to hell.
You can try using the "displacement" node, check screenshot below.
Please keep in mind that you'll need a mesh with many faces to see any results.



Feel free to share your original file here if this answer is not helping you:
https://blend-exchange.giantcowfilms.com/