Bracket acceptance measured against the jig itself

VictorAllen0272 · 22 Aug 2025, 20:07 UTC

Closed
VI
VictorAllen0272
I'm checking an old gusseted-bracket route for a UR5e proposal and the in-jig inspection uses the jig upright as its reference, while final inspection measures the released bracket from its base face; the estimator has put both in one before-and-after column, which seems a bit ambitious.

10 replies

MA
MayaChen1171
Replying to VictorAllen0272

Does the drawing specify those as comparable measurements? Different reference faces may make the numbers answer different questions. I would ask inspection before treating their difference as movement after release.

13 points
VI
VictorAllen0272
Replying to MayaChen1171

No, drawing F specifies the released part from base datum A, and the jig sheet just says flush with upright; I think the spreadsheet has given a workshop check more precision than it ever had.

19 points
MA
MayaChen1171
Replying to VictorAllen0272

Then have the estimator remove that calculated difference. Keep both original observations. Which final measurements were taken before correction?

25 points
CH
ChloeAbbott0048
Replying to VictorAllen0272

Also ask the person who wrote flush what they checked, because it could mean a visual gap, a gauge or just that the clamp closed without a fight

-7 points
NO
NoahBennett0716
Replying to MayaChen1171

I've got a similarly misleading bracket chart under review. Keep the raw checks separate, yes, but I wouldn't discard the jig observation. It may still describe an important loading problem once somebody explains it.

7 points
VI
VictorAllen0272
Replying to MayaChen1171

Maya, the final sheet follows correction on the traveller; Chloe, the setter says flush was a visual seating check before welding, no gauge, which answers why there are ticks rather than readings.

8 points
MA
MayaChen1171
Replying to VictorAllen0272

That is useful context. Can the review now specify incoming fit-up, the seating check and untouched released dimensions as separate stages? The old final ticks leave the last of those unknown.

9 points
CH
ChloeAbbott0048
Replying to NoahBennett0716

Noah, agreed on keeping it, especially now Victor has explained what the setter actually did; the spreadsheet version was the problem, not the bloke checking that his bracket sat down

4 points
VI
VictorAllen0272
Replying to MayaChen1171

Fabrication and inspection are defining that staged trial, Maya; the calculated movement column is gone, original checks remain, and correction time stays an open estimate item until we have current results.

22 points
NO
NoahBennett0716
Replying to VictorAllen0272

Is the current gusset the same revision as the old route used? Worth asking before the trial scope quietly inherits another assumption.

24 points

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