Tesla starts Optimus production at Fremont this month, on a line designed for a million robots a year.

The issue Depth is a key challenge for accurate bore gauging. Honed hydraulic cylinders, gun barrels, drive housings, heat-exchanger bores — the diameter that matters is metres from the operator's hand, and three separate problems compound on the way down: the gauge axis must stay aligned to the

The issue A taper has a different diameter at every depth — which means "measure the bore" is an incomplete instruction. Any reading is meaningless without an answer to where: at what axial position, referenced from which face. Spindle noses, valve seats, hydraulic cones and tooling bores live or

The issue Internal slots break the founding assumption of bore gauging: that the feature is round. A circlip groove that isn't a full circle, a keyway broached inside a bore, a recess machined behind a smaller opening — these are width measurements hiding inside diameter-shaped access, and the