Note that finger (well, box) joints require a vertical fixture at the front of the machine — I worked one up ages ago:
but am disenchanted, either w/ my clunky fixture, or the entire concept — cutting traditional joinery on the machine requires at a minimum 3 setups:
- cut parts to size and machine internal features
- mount all 4 boards in pairs in the correct orientation on the machine/fixture and machine joints at two corners
- reposition all 4 boards and cut the opposite corners
We’ve tried a bunch of other techniques:
and I’ve been working on various designs:
and see the pages on joinery at:
I’ve pretty much dialed things in w/
The bamboo pencil cup had joinery so tight that when I clamped it up for a test fit, I couldn’t get it apart:
which I need to finish writing up/documenting — the issue is one of balancing the size of a V endmill against number of passes w/ a V endmill — the former can be a budget and spindle capacity issue, the latter gets tedious to draw up and arrange toolpaths for (in the current Carbide Create).