Finally decided to try and figure out how this bowl guage works by attacking the end grain on a Birch branch I found next to the road. (It's been sitting around the shop for a while so it's only semi-green.)
My first attempt found me trying to cut from the rim to the center, center to rim, holding and moving the tool every way imaginable. Sometimes I got a good cut, sometimes fine dust, and sometimes just smoke. I'm assuming smoke is bad! I allowed the piece to fly off three times before quitting. I managed to cut in 3/4" but things seemed to be getting better.
After going home to read a little about it and change my underwear, I tried it again. I parted off the last inch of the branch and drilled a 1" deep depth whole. Tried cutting from the center to the rim and this time it started working!! Next thing I knew things felt a little different. I realized I had gone in past my 1" depth whole. Took a few more cuts just because it was working so well. Ended up about 5/4" in.
Off course, I run home to show the kids, neighbors, cat, dogs, shrubbery, etc.
hollow1.jpg
The kids look at me like I'm explaining cold fusion in pig latin but they do want to know what it is. Thinking quick, I came up with this.
hollow2.jpg
It's an egg holder! The egg sits up a little because I ended up leaving a dimple in the bottom where I turned deeper than my depth hole and lost the center a bit.
I was so excited I forgot to try out my new hot fudge spreader
Guess I'll just have to do it again today
Thanks for looking.
Dave Fried