our fr5 block looks square until it leaves the fixture

BenAdams0109 · 18 Jan 2026, 23:59 UTC

Closed
BE
BenAdams0109
We've stopped nudging the FR5 pickup. The spacer looks square while supported in the fixture, then turns slightly in the grip as it leaves. I want to understand that first, not move the tray point to catch it somewhere else

13 replies

CL
ClaraChen1133
Replying to BenAdams0109

Have maintenance compare the block's actual contact with both fingers during the isolated tooling inspection, including what supports it before it leaves the fixture; a square starting picture may depend on support the grip does not provide.

9 points
BE
BenAdams0109
Replying to ClaraChen1133

They've got the retained blocks and the saved pickup versions. The fixture supports both ends before lift, but the camera only shows the front finger's contact. We haven't checked behind it yet

9 points
JA
JackChan1124
Replying to BenAdams0109

Same block revision as the earlier reliable run?

11 points
NO
NoahBarnes0542
Replying to JackChan1124

Compare several identified blocks, not just the one that behaves best. I've been handed a lovely reference piece from someone's desk and a tote of production pieces that sat differently. The reference wasn't dishonest. It had simply stopped representing what arrived at the bench. A quick comparison of the faces the fingers actually touch can save a much larger argument about the robot.

7 points
BE
BenAdams0109
Replying to JackChan1124

Jack, the current batch has a new drawing revision. Noah, the old reference has a plain face where these have a shallow relief. Nobody linked that change to the gripping contacts

7 points
AN
AnilBell0636
Replying to BenAdams0109

Put both revisions in front of the tooling designer. Don't teach around a changed contact face before somebody explains how the proposed grip is meant to hold it.

9 points
CL
ClaraChen1133
Replying to BenAdams0109

And have inspection confirm those blocks match the new drawing, because a design change and an out-of-spec part would need different answers even if the camera showed similar movement.

16 points
NO
NoahBarnes0542
Replying to ClaraChen1133

Clara, yes. My comparison wasn't meant to make the old block the standard forever. The current drawing gets a vote too.

4 points
BE
BenAdams0109
Replying to ClaraChen1133

Inspection confirmed the new blocks match their drawing. Tooling found that the existing finger bridges the relief and no longer contacts the face as intended. The old block sits on a full contact instead

18 points
JA
JackChan1124
Replying to BenAdams0109

That isn't wear, then.

13 points
AN
AnilBell0636
Replying to JackChan1124

It explains the changed contact, Jack. Maintenance should still finish checking the assembly before anyone decides the only work needed is new fingers.

11 points
BE
BenAdams0109
Replying to AnilBell0636

Assembly check is complete now, with no other mismatch found against its drawing. We're holding the new-revision blocks out of this job while tooling reviews the grip. Existing pickup corrections are not being copied into a replacement tool setup

16 points
NO
NoahBarnes0542
Replying to BenAdams0109

Who gets told when that block drawing changes again? I'd include tooling in that notification now, while everyone remembers why the little relief mattered.

21 points

Discussion closed

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