Square bowl....

[Doug Rasmussen]

This is a fun little project, a square bowl with a fluted exterior. 3-1/2" x 3-1/2" x 1-1/8" high. Wood is unknown, very hard, fine grain, part of a packing crate for a jet engine shipped from Japan.

I finally broke down and bought a CNC wood router. Millright CNC used, new to me. In the past I've been using metal working CNC's, too much trouble to clean up after using on wood.

Part was done using free Fusion 360 CAD and Vectric software that is include with a good many CNC wood routers. Created 3D models in Fusion for the interior and exterior and projected the toolpath onto the models. A bit of a learning curve in Fusion because I haven't used it in recent years. Vectric is much more user friendly. If it was a round bowl the whole thing would be a piece of cake in Vectric.

Cutter was a 1/4" diameter HSS cutter, same as 1/4" router bit. No sanding at all, wood is hard enough for very clean cuts. Didn't time it, might have been 10 minutes cutting, mostly for the interior. Setup on the machine, maybe 2 hours or more since I don't have the best set of hold downs.

 

[Mark Hepburn]

Cool.

 

[Tim Hunter]

Are you testing the moderators’ tolerance for non-turned objects?…’likely to be banished to the ornamental turning forum.

Tim (where some of my work resides…)

 

[Mark Jundanian]

Attractive and intriguing piece. I wonder if the tool marks on the inside can be lessened?

 

[Doug Rasmussen]

I wonder if the tool marks on the inside can be lessened?

Good eye Mark.

My photo of the interior wasn't high quality so it isn't easy to see the interior surface finish was purposely not smooth. It has a low scallop height to give interior continuity with the high scallop height of the exterior. CNC excels in these design aspects that would be near impossible for a hand turner to accomplish without carving.

My interest is in the design of objects which is the real challenge. CNC gives me a way to design an item and be certain the end product will match the design.

 

[RichColvin]

Are you testing the moderators’ tolerance for non-turned objects?…’likely to be banished to the ornamental turning forum.

Tim (where some of my work resides…)

That would be testing the definition for ornamental turning.

 

[Mark Jundanian]

It has a low scallop height to give interior continuity with the high scallop height of the exterior.

....

My interest is in the design of objects which is the real challenge.

So, I'm looking at this again, and If I'm honest, the scalloping on the inside still bothers me.

I'm not saying this is doable, but if I had a magic wand (and was keeping the scallops), I would make the scalloping in each of the four quadrants line up, so the inside scallops are parallel to the outside scallops in each quadrant. The inside scalops would have to fade out as they meet toward center, just as they do on the outside.