I am helping prepare the fixture handover for an FR10 bracket cell. The old check sheet measures from the fixture base, while the drawing locates the finished bracket from its mounting face. A few old results simply say 'low after release'.
How should I set out the comparison so we can tell whether the bracket changed shape or the measurement reference changed? I understand the robot program better than this part of the paperwork.
Which face should our bracket inspection sheet use after unclamping?
JaneBennett0771 · 2025年6月15日 09:02 UTC
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Sketch the two setups side by side. Put the actual contact faces on each sketch. 'Low' has quite a career when nobody writes down low relative to what.
20分The in-fixture check touches the top of the upright. The released check uses the same indicator, but the bracket sits on a surface plate. I cannot find a sketch of how they support it there.
19分Ask whoever made those readings to show you. The same indicator can report different things in different setups. Its familiarity doesn't rescue the comparison.
10分Which drawing revision are you trying to meet?
8分Revision D. The old check sheet cites B, so I have requested both drawings. I had only noticed the different supports before your question.
4分B has arrived. The mounting-face datum is unchanged, but D adds a flatness requirement there. That makes me less comfortable with assuming the part sits flat after release.
13分Have metrology define the released setup for D. You now have a specific question for them: how to establish that datum with the surface you actually have.
14分Please get a photo of the support arrangement when they settle it. We had a fixture discussion derailed by everyone imagining a different bench setup, and the person holding the indicator thought we all knew. I certainly didn't.
15分Do the old results identify individual brackets? I would struggle to pair before and after readings from a batch average.
14分Jane, did the old operator manage to show you their released check? Curious whether the missing support sketch was the whole problem.
14分They used a packing strip under one edge because some brackets rocked. The strip thickness wasn't recorded. Aaron, individual brackets are numbered on one sheet, but most results are batch summaries.
16分Metrology has drafted the revision D inspection setup and wants a fresh numbered set. We are keeping the old sheets as background. I cannot use them to calculate how far the brackets moved when released.
12分Did the fresh set get measured? I'd like to hear whether that rocking mounting face shows up consistently.
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