When this setup runs, a CNC lathe behaves like a shaper: a clamped indexable insert sweeps along the edge of an aluminum part and takes off the burr. The workpiece sits in a rotating chuck while a metal nozzle pours coolant over the cut, and the maker reports the insert cuts the burr clean off rather than leaving anything behind.
The hardware side is straightforward. The insert clamps into a standard lathe tool holder, and the part grips in a HAINBUCH SPANNTOP chuck with Kombi Axfix markings, rated up to 6000 rpm. The machine runs a Siemens 840d control, which relies mostly on built-in cycles instead of long stretches of direct G code. On the programming side, the path was laid out in Fusion as a 2D contour on an open chain, going the right way, with the lead-in radius set to move in x only. The insert was programmed as a 1/16 ball end mill, the operation targets a .010 inch chamfer, and each pass takes only a couple thou. Everything runs in the C axis.
Two details stand out to me. The maker stripped the live spindle M code out by hand to save wear, which reads as a tidy bit of housekeeping. And the shallow depth of cut seems like a sensible way to treat an insert doing a job it was not shaped for, though that is just my read.
The clip shows the insert engaging the outer diameter and peeling off fine shavings, with large curly swarf piling up inside the enclosure. One open question remains: the insert's real lifespan was never stated, only the maker's guess that it should hold up a while on aluminum at that shallow depth.