Tray Reassembly Bench

Twenty identical forceps go through sterilisation. Each cycle wears the steel and dulls the laser mark. After every cycle the tray is put back together and checked. Surfaces here are simulated with the Residue model; wear and mark life are example settings you can change below.

drag to orbit · click a forceps to inspect

3D view unavailable here. Use the numbered slots below.

mark and steel both identify it mark unreadable, steel identifies it scan again, then hand check

Tray after the last reassembly

marks still readable

identified from the steel

sent to hand check

wrong matches

Manifest · slots 1 to 20

Pull one out and read it

Each bar is one candidate from this tray's manifest: how far its score sits above unrelated instruments. Bars are on a log scale.

Slot 1: laser mark against steel

Laser markreadable

first assembly

now

Steel surface, as the three lights see itidentified

first assembly

now

Laser mark, modules still readablereads while 80% or more survive

Steel, distance above the match linelog scale

Solid line: re-enrolled at each reassembly, so wear is survived one step at a time. Dashed line: the same instrument read against its first-assembly capture only.

Error budget for your hospital

Hospital size

Identical forceps in the hospital2,000

Cycles one tray sees in a year600

Assumptions you can change

Steel surface change per cycle60 nm

Laser mark readable for about300 cycles

Feature depth over width0.50

Share of texture from the tool0.50

Wear per cycle and mark life are example values. Nobody has published them for instrument steel, and measuring them on one tray type is what the pilot does. The last two change the surface itself and start a new tray. To keep the demo quick, reassembly here happens every 25 cycles; the real bench reads at every cycle, which is easier.