How do I prove the second sheet stayed behind?

AaronCarter0958 · 4 Feb 2025, 06:57 UTC

Closed
AA
AaronCarter0958
I've been given a successful vacuum test for our proposed FR10 panel loader. It shows one coated steel panel hanging from the tool. Our supply will be a stack, and nobody seems to have tested picking from it. What should I ask the tooling firm to demonstrate? Holding one sheet is useful, but it doesn't answer whether we'll deliver two. Or whether the unsupported edge will sag into the nest.

20 replies

HA
HazelAdams0136
Replying to AaronCarter0958

Ask for a stack-fed trial with your panel condition represented. The single-sheet result establishes only that test case.

5 points
AA
AaronCarter0958
Replying to HazelAdams0136

They've offered a video with three clean panels. Ours arrive with a light residue between sheets. I don't know whether that's significant yet.

10 points
HA
HazelAdams0136
Replying to AaronCarter0958

Include it in the samples. If the surface condition changes separation, clean panels could hide the problem.

14 points
AA
AaronCarter0958
Replying to HazelAdams0136

Sent uncleaned samples in the original wrapping. Asked them to leave half that way and document anything they do to the others.

24 points
HA
HazelAdams0136
Replying to AaronCarter0958

Add the stack height and edge condition to the test description. Those can change the pickup situation too.

17 points
LI
LinBrown0879
Replying to AaronCarter0958

Film the stack edge during pickup, not just the tool from above.

-10 points
HA
HazelAdams0136
Replying to LinBrown0879

Useful view. Also request a positive account of how many panels arrived at the nest; video alone may miss a pair.

22 points
FA
FarahBennett0765
Replying to AaronCarter0958

What does the present report call a successful pick? I am wondering whether it records only the vacuum signal, or also checks the delivered panel count.

11 points
HA
HazelAdams0136
Replying to FarahBennett0765

A seal indication isn't a sheet counter. Easy for a report to blur that distinction.

15 points
AA
AaronCarter0958
Replying to FarahBennett0765

Just vacuum established and held for the bench test. I've asked for separate results for retention, sheet count and placement. No point one green tick doing three jobs.

11 points
HA
HarishAllen0315
Replying to AaronCarter0958

Will a detected double pick leave the job pending, or will the trial operator remove it and the demonstration continue? That affects what a successful run means.

12 points
AA
AaronCarter0958
Replying to HarishAllen0315

Haven't defined that. I'd assumed they'd stop and show us the failure, but I'll get it written into the trial plan. No quiet tidying between picks.

23 points
HA
HazelAdams0136
Replying to AaronCarter0958

Ask for the raw attempt count, including interrupted attempts. A highlight reel can make troublesome tooling look ready.

11 points
LI
LinBrown0879
Replying to AaronCarter0958

And retain the bent sample if an edge catches; its shape tells you more than 'placement failed'.

7 points
AA
AaronCarter0958
Replying to HazelAdams0136

First sample trial found a pair lifting together. Vacuum indication looked normal. They caught it in the receiving check, so at least we now have the failure on record.

16 points
FA
FarahBennett0765
Replying to AaronCarter0958

Was that pair from the uncleaned set? That would help identify which condition to investigate, although one occurrence would not establish a reliable separation method.

9 points
HA
HazelAdams0136
Replying to FarahBennett0765

Do not accept cleaning as the fix unless your production supply will be cleaned under an agreed process.

5 points
AA
AaronCarter0958
Replying to FarahBennett0765

Yes, uncleaned. Production isn't going to clean every panel, so the tooling firm is reviewing separation with that condition included. Still no answer on edge support.

7 points
AA
AaronCarter0958
Replying to AaronCarter0958

They've also sent a side view now. The free corner drops below the nest lip on approach. Two separate jobs for them, then: separation and a support arrangement that reaches the nest cleanly.

24 points
HA
HazelAdams0136
Replying to AaronCarter0958

Keep both findings attached to the revised trial. Solving the double pickup must not conceal the remaining support problem.

18 points

Discussion closed

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