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Re: Joints Anyone

Posted: Sat Jan 30, 2016 2:56 pm
by Juan Hidrovo
Im very impressed of Your ability to create these incredible joints.
Must be a real challenge to program and then mount the material to make them fit that tight and perfect.
Keep posting please.
It is a real pleassure to see what others can do with similar equipment.
Encourages me to keep trying to make this kind of projects.

Creative CNC Joinery

Posted: Sat Jan 30, 2016 6:45 pm
by 4DThinker
Juan Hidrovo wrote:Im very impressed of Your ability to create these incredible joints.
Thanks, Juan. My secret is more about experience than genius. I learned drafting in high school 40ish years ago, computers and CAD software back when PCs were new and software came on and ran from floppy disks. I've been teaching woodworking/furniture design for the last 35 years. It is adding all those things together that arms me to be just a little smarter than my college students. ;) That, and having had my own CNC to play with for the last 4 years. :) The big leap in what I can do came from they way Probotix designed their CNCs. With no center Y motor or gantry bar under the frame I added an internal cross bar and have set up my CNC and the ones we have at the university to be able to cut with material clamped flat or vertical or at any angle/compound angle in between. Now they are selling them with a cross bar available as a joinery option. They advertise it as a dovetail/joinery fixture, but that just scratches the surface of what you can do once you go vertical/angled under the spindle.

4D

Creative CNC Joinery

Posted: Sun Jan 31, 2016 2:48 pm
by 4DThinker
Pin Row. Arched totally for aesthetics not for any strength or structural advantage. On this one I used -.001 as my pocket allowance on the pins, but the joint was still tight enough to have to be tapped together. May not be room for glue in there.

Arc Pins Example1.jpg
7/32" wide end grain pins. Walnut. Not yet glued or finished.
Arc Pins Example1.jpg (1.53 MiB) Viewed 5255 times


4D

Re: Joints Anyone

Posted: Thu Feb 11, 2016 7:15 pm
by artman60
Looking good 4D, you're making me very impatient at getting my $!*& together so I can order my machine and start learning/playing.

Re: Joints Anyone

Posted: Fri Feb 12, 2016 12:07 am
by KLWestfall
Arched totally for aesthetics not for any strength or structural advantage.



Because you CAN!!!!

Creative CNC Joinery

Posted: Sun Feb 14, 2016 6:07 pm
by 4DThinker
Because you CAN!!!!

I can, but it is usually because I like to make simple things harder to do than they need to be. Next on my agenda is to figure out how to make a round router bit cut a square hole. I've got the sides figured out, but the corners are still giving me fits. ;)

4D

Creative CNC Joinery

Posted: Sat Mar 26, 2016 3:39 pm
by 4DThinker
Another test done for a student. His project (coffee table) will have 6 or more intersections like this, only larger. This was to see if there would be enough material that wouldn't split after cutting a 3-tenon row on each angled end to go into shared 3-mortise row.

One side the tenons split perfectly down the grain 45 degrees from the inside corner of the tenons. Small block may have already had a check in the end. Still, I glued the broken parts in followed by the remaining 1/2 tenons on that side, and whole tenons in against the first on the other side. Sorry I can't show this joint open. It had to be glued together.
45 degree twin pin one slot_1.jpg
45 degree twin pin one slot_1.jpg (1.17 MiB) Viewed 4959 times

4D

Creative CNC Joinery

Posted: Sat Mar 26, 2016 3:42 pm
by 4DThinker
Second view. Very small sample. No need to test the joint full size. Beech base and cherry angled pieces.
45 degree twin pin one slot_2.jpg
45 degree twin pin one slot_2.jpg (1.6 MiB) Viewed 4959 times

4D

Creative CNC Joinery

Posted: Sun Mar 27, 2016 8:27 am
by 4DThinker
Another test. This one uses the fluting toolpath in Aspire/VCarve Pro to cut the slots. Ramps down at 45 degrees then runs straight for the rest of the slot. Good fit. No splitting of the fingers. End of top board pre-cut at 45 degrees before CNCing the fingers.

Another 45 degree Joint_1.jpg
Another 45 degree Joint_1.jpg (1.5 MiB) Viewed 4950 times

4D

Creative CNC Joinery

Posted: Sun Mar 27, 2016 8:28 am
by 4DThinker
The 45 degree intersection together. Dry fit.

Another 45 degree Joint_3.jpg
Another 45 degree Joint_3.jpg (1.25 MiB) Viewed 4950 times

4D