Inline optical QC: devices for the record inspection station

User, 17 Oct 2026: research on the inline QC equipment, which devices
can be used for the optical check.

- New docs/equipment/inline-optical-qc.md: defect-by-defect table with
  the optical signature, device and limit (IEC 98 / DIN 45547 hole and
  eccentricity, Stamper Discs targets, Mobineko warp limits), precedents
  (no vinyl product; Dr. Schenk ISM CD scanner as template; Basler/Xiris;
  PRP AQA 2023; CTU thesis), a station design (centring turntable, 4k
  line-scan per side with dark-field, bright-field and transmitted light,
  colour label camera, two laser warp sensors or a line profiler,
  optional thermal camera) with sourced price signals, resolution and
  eccentricity math, throughput, placement at the Duplex cell and the
  Classic, smart-camera vs open GenICam/Aravis/OpenCV/anomalib on NixOS,
  specials, Thai channels, next steps.
- Estimate USD 12k-30k hardware per station, ~USD 40k-100k for the two
  launch stations; inside the existing metrology launch tier, no plan
  price change.
- Backlinks: quality-automation.md layer 1, digital-factory.md QC
  integration row, README bullet and tree.

docs/quality-automation.md

@@ -134,10 +134,16 @@ print defects). Non-fill and stitching correlate with audible defects, so
 optical inspection is a strong proxy for audio quality without playing the
 record.
 
-No vinyl-specific vision product exists; this is a custom integration of
-general machine vision (Keyence or Cognex class) at the press unloader. CNX
-would be an early adopter, and it should be budgeted as an integration
-project.
+No vinyl-specific vision product exists (search of October 2026); this is
+a custom integration of general machine vision at the press unloader, on
+the pattern of the old CD and DVD in-line scanners: one turn under a
+radial line-scan camera with angled lights, plus laser distance sensors
+for warp. The closest vinyl precedent is Precision Record Pressing's
+in-house AQA (2023), which scans sampled records with cameras in the lid
+of modified turntables before playing them. CNX would be an early
+adopter, and it should be budgeted as an integration project. The device
+options, a station design, prices and a cost estimate are in
+[inline optical QC](equipment/inline-optical-qc.md).
 
 ### Layer 2: press telemetry, every cycle