Why does reseating our cover create another reject example?

MariaBailey · 26 Jul 2025, 11:00 UTC

Closed
MA
MariaBailey
I need trustworthy examples for our UR5e camera station. The same polished cover gains a bright stripe after reseating, and somebody labels the new image scratched. The physical cover has not changed. How do we stop teaching the inspection to recognise our setup variation?

15 replies

IS
IsabelBennett0735
Replying to MariaBailey

Check the physical cover under the agreed inspection conditions first. Then capture the identified sample repeatedly with the lighting fixed. You'll have a much better question if you know which marks are really there.

13 points
MA
MariaBailey
Replying to IsabelBennett0735

Quality has accepted the cover. There is a small rub near one fixing hole, within their allowed example. The broad stripe does not correspond to a mark they can find.

15 points
IS
IsabelBennett0735
Replying to MariaBailey

Good, keep the rub in the image comparison rather than cropping it out to concentrate on the stripe. You need to see how the setup treats a known physical feature too.

3 points
SA
SamBrooks0855
Replying to MariaBailey

Does the cover sit against the same contacts after every reseat?

-1 points
MA
MariaBailey
Replying to SamBrooks0855

We have not checked that closely. The holding fixture is a trial nest, and the rim seems to catch one corner before the cover settles.

16 points
LI
LiamArcher0403
Replying to MariaBailey

Can the fixture designer inspect that corner before another lighting change?

10 points
IS
IsabelBennett0735
Replying to LiamArcher0403

Yes, but don't assume the corner explains every image difference. Keep the same camera and lighting settings through that comparison or you'll lose the useful link again.

19 points
MA
MariaBailey
Replying to LiamArcher0403

Designer found contact at the rim where the trial nest was meant to leave clearance. They are revising that area. Camera and light settings are recorded for the before-and-after captures.

8 points
KA
KaiBrooks0802
Replying to MariaBailey

Use the same identified cover after the fixture revision, so the comparison does not accidentally become a different part under a different setup.

17 points
MA
MariaBailey
Replying to KaiBrooks0802

The revised nest seats that cover more consistently in the bench check. New images still have some bright variation, though the big change after reseating is reduced. I am not calling the inspection finished.

18 points
SA
SamBrooks0855
Replying to MariaBailey

Is the acceptable rub still visible in the revised images, Maria?

17 points
MA
MariaBailey
Replying to SamBrooks0855

Yes, but only faintly in some views. We need a rejected sample with an agreed defect for the next imaging comparison as well.

16 points
LI
LiamArcher0403
Replying to MariaBailey

Thanks for the fixture result. Did the designer update the nest drawing?

7 points
IS
IsabelBennett0735
Replying to MariaBailey

And have quality choose that reject by inspecting the part, not by finding the most dramatic picture in the old folder. You've just seen how persuasive the wrong bright line can be.

15 points
MA
MariaBailey
Replying to LiamArcher0403

Nest drawing is now revision B, Liam. Quality has selected and identified a scratched cover for the next comparison. No new threshold chosen yet.

23 points

Discussion closed

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