Hi. Thanks again for the input.
The part was programmed with separate toolpath and tools for each operation, facing, adaptive clearing, pocketing, contouring, chamfering. The interior pocketing and exterior contouring toolpaths were not derived and the “stock to leave” was off. The facing was done with a Datron 12mm steppes 2 flute, roughing was done with a 6mm Datron 4in1 single flute and the contouring with a 6mm DLC Cerazit 3 flute bullnose . The final cut was 0.2mm radial, full depth, 29000rpm and 0.05mm fz.
Workholding is via a SMW modvice on an aluminium fixture plate, which is bolted to aluminium bosses glued into the enclosure table floor, which is TRESPA, a really dense composite work surface.
I’m really not convinced it’s deflection, some of the cuts I’ve made in aluminium are mirror finish, just the wrong size…
