Running a 6061 plate today, the solid has a 0.45 mm edge blend but the drawing calls R0.5 ±0.1; do you program to the model or the print when the CMM team aligns and probes to CAD? I can hit either with a 3 mm ball at 0.02 mm stepover, but I don’t want to fail FAI over a 0.05 mm mismatch at the corner.
I’d cut to the print unless it’s explicitly MBD; “the drawing is the authority unless otherwise specified.” Loop in @quality to set the CMM nominal to R0.5 or get engineering to kick out a corrected STEP so FAI isn’t judging a 0.5 cut against a 0.45 CAD. No one wants to fail over a gnat’s eyelash.
, I’ve been burned by this — when the solid says 0.45 and the print says “R0.5 ±0.1,” I re‑fillet that edge in CAM to 0.50 and hand QA a dumb STEP labeled inspection nominal so the CMM doesn’t align to the 0.45 model. With your 3 mm ball at 0.02 stepover it’ll hold fine; just note the override on the FAI or loop in @gradavi for a quick quality sign‑off. Only caveat: if that corner mates, confirm 0.50 won’t foul anything before you push it.
Program the edge to the print radius and have inspection override that feature’s nominal in the CMM plan so it’s checked to the drawing while still aligning to CAD for everything else — saves a lot of 0.45 vs 0.50 ping‑pong. @wsanch36 is right about giving QA something to key off; if PMI drives inspection at your place, get a quick “drawing is master” note on the FAI?
Verify the authority first — if the title block says ‘MODEL IS MASTER’, get a quick deviation or have inspection run a patched CAD with the 0.5 corner for FAI. If the print rules, cut to the callout and bias a hair high so paper beats pixels.
I’ve run into this — “cut to the callout and bias a hair high so paper beats”; I’ll bump the 3 mm ball’s defined diameter +0.02 mm in CAM so the finish pass opens that blend to ~R0.50 while the rest stays on‑model. @microdr can your CMM plan flag that corner as print‑controlled for FAI?