Joint toolpath help needed

Hi, try to develop joints like these,

came to that kind of project
longitud_joint.c2d (60 KB)
and failed to proceed with a toolpath. The both pieces should be identical. Could never get rid of loose ends. No rush, but if I continue cutting projects from plywood instead of connecting boards I get crammed with all the leftover cutouts.

You need to define regions for the toolpaths in question:

in two layers — start with the region of greatest extension:

offset by tool diameter plus 10% or so:

(assuming a 6.35mm tool)

Then you need to create the shorter-upper region — draw in the missing geometry for it:

Done

and select everything and join:

Yes

Then, assign toolpaths — cut the first half of the thickness:

Then create a toolpath to cut the balance:

starting where one left off:

Repeat for the other side, but it’s probably simplest to just copy and then align nodes and drag things around to grid intersection and node edit and re-create the offset and re-assign toolpaths:

to arrive at:

Attached as a v8 file.

longitud_joint_v8.c2d (104 KB)

1 Like

Wow! Thank you! It looks so easy and logic when you do it. Will take me some days just to comprehend and some more days to understand.
:+1: :+1: :+1:

Your other option is just get meshCam

MeshCAM doesn’t include a CAD solution, hence:

Dean, ok, when I generate GCode: how will that be cut on a Shapeoko? Does it import into CarbideMotion?

MeshCAM would write out G-code which would then load into Carbide Motion.

I tried MeshCAM for some hours. Minimal video support, did not understand the concept at all, only pro version has contour and pocket definition, and I could not even figure out how: too bothersome for me. Should be good for stl import, did not try.

Have QCADCAM: cannot define pocket, only with some workarounds…

Still Carbide Create has it’s pitholes… however for me with little overview appears to be the best so far. What I missed for a while -the toolpath simulation- is now included. :+1:
Even if I did not try yet: CC has STL support now too.
And if one gets stuck: the forum always helps within few hours, mostly within very few minutes.