I recently purchased a uniquely-shaped boring bar for my slant-bed lathe to do some concave facing work, and Fusion doesn't have a pre-packaged toolholder in the turning tool library to accommodate this. (The end of the bar has a 27.5' clearance angle from vertical, just to give an idea.) A fellow Fusion user suggested to me that I just add 10' degrees to the tool orientation angle either in the tool setup itself in the library or in the Profile operation itself. The problem I ran into with this is that Fusion seems to be doing some radius comp and the parts are coming out oversized on the OD, and undersized on their IDs. Simulation and the posted code both reflect this. If I leave the tool "as-is" with the incorrect 17.5' end angle, then the simulation and posted code are fine. (Aside from it not correctly simulating whether the insert will clear or not.
Fusion Team - do you guys have any plans in the future to introduce custom lathe toolholders, or maybe expanding the pre-packaged options to include a wider range of oddball geometries?
See attached for the drawing of the bar [and VBMT 21.51 insert] I'm using, as well as how the toolpaths look on a simpler dummy part with and without the tool orientation adjustment. For reference, the OD of that section of the part is 0.507".
![Autodesk Design & Make Report](https://forums.autodesk.com/t5/image/serverpage/image-id/1350519iCB55845EBFC43016/image-size/large?v=v2&px=999" "Autodesk Design & Make Report")