Toothbrush Stand „The Snout“
... plus I had the urge to create my first 'real' 3D object. Using a cnc to cut a 3D relief is very popular, but due to the limitation of my machine I left it to a few unexciting trials so far. This time I was determined to go the whole way.
Staring out with the demand of an actual 3D object I used Sculptris too paint a pigs snout. After a few minutes, I had a usable result. Simplifying the resulting stl in MeshLab (reducing the triangle count) I went over to Fusion360 to create the final stand shape. I had to scale the part, cut off the top and extrude the foot.
The result were two versions: one with the relief on top and the stand extruded and one that had only the top containing the relief. That is what I used as my material thickness was limited to 20 mm. The G-code was generated with Estlcam. The parameters are quite clear. I made two (smaller) test cuts, first on styrofoam, then on MDF. The final result was cut on oak. A second layer gave the thing it's final thickness. Estlcam lets you extrude the contour of a stl, so this was a fast operation.
Apart from the prolonged machine-time, a 3d relief takes I was rather unhappy with the results from my desktop cnc by Stepcraft. The z-height seems to be too unstable and was leaving streaks on the surface. The cutting process itself went well. I used a 3 mm upcut endmill especially designed for wood to remove the most of the material and a 3 mm ball nose end mill to get a smooth surface. Not even sanding the workpiece did not remove all of the streaks, but a little mineral oil showed the wood structure and made the object ready to be used in the bathroom.