Here is another one of the excellent projects by @45rpm. I glued and clamped some scraps of Ash together and then surfaced them and cut this 110mm diameter x 60mm high box from the scraps. It was then V carved and all it awaits is some sanding and finishing.
V carved lid using a 30° spectra coated Amana bit. Speed of the router was 18,000 rpm
and the feed speed was 1500mm per minute. The cut was made in 4 x .5mm passes to a depth of 2mm. in a lid that was cut to a 4mm thickness. Note: Some of the very thin central sections were damaged but overall, the picture carved quite well.
This is the edge on view showing the great fit and a mistake. I had omitted the finishing cut 0.1 on the lower section, as determined by the horizontal milling lines. The tab site on the right of the picture at the base needs to be finished and the glue was not quite thick enough.
The next image shows the base being cut. Speed was 18,000 rpm and feed was 1500mm per minute with a stepdown of 2mm. The cutter was a 1/4" carbide cutter with a 30° helix and four flutes. The length of cut is one inch.
This image shows the chip size produced by the1/4" Niagara cutter was making.
This image shows the beginning of the V carve process. Because the workpiece was already held and centred to make the release cut, I opted to just flip the stock and move it towards an index mark, drawn on the baseboard, so that the carved image would be central on the lid.
The tabs were placed equidistant (one in each quadrant of a circle) and the were 5mm in width and 3mm in depth. This was sufficient support of the workpiece to allow the machine V carving of the lid.
Other dimensions were the walls and lip features were 5mm in thickness. Each half was 30mm in depth (the maximum LOC of my 1/4" cutter). The main pocket was 26mm in depth, to permit a 4mm base and lid thickness. The finish will be sanding up to 3000 grit and then a walnut oil and beeswax coating.