Pads pass the first housing and mark the twentieth

ChloeBaker0483 · 8 Feb 2025, 16:07 UTC

Closed
CH
ChloeBaker0483
I need a better gripper comparison for our UR5e. Fresh pads leave our coated housings looking fine, but later samples get dull crescents. And one housing sticks when released into its tray.

10 replies

JO
JoFixtures
Replying to ChloeBaker0483

The change over repeated handling is useful evidence, are the dull crescents matching the pad contacts and has anyone checked what's building up on those pads?

8 points
CH
ChloeBaker0483
Replying to JoFixtures

Yes, same arcs as the contacts. There's visible residue on the pads, though we don't know if it's from the coating or the packing process.

13 points
JO
JoFixtures
Replying to ChloeBaker0483

Keep those used pads for the tooling supplier and compare them with unused ones, a fresh-pad beauty contest won't tell you how often the operator will need to clean or replace them.

10 points
MI
MiaChan1079
Replying to ChloeBaker0483

Inspection conditions. Agree where and how the crescents are judged before comparing pad materials. Keep accepted production samples beside the trial pieces. Otherwise a change of light at the packing bench can look like a change in tooling performance

6 points
JO
JoFixtures
Replying to ChloeBaker0483

And keep release in the acceptance trial, getting a housing into the tray doesn't count if it comes back up attached to the jaw.

11 points
CH
ChloeBaker0483
Replying to JoFixtures

Quality picked a viewing light and reference pieces with us. They reject the dull crescents. Thanks for the used-pad suggestion, those are going back with the marked housings.

18 points
NI
NinaCarter1023
Replying to ChloeBaker0483

We had a residue problem that only appeared after a packaging change. Did your sample housings all go through the same cleaning and packing route, or did somebody prepare the first few specially?

2 points
OW
OwenAllen0312
Replying to ChloeBaker0483

What will happen when a pad is replaced during production? The trial needs a documented pad condition and replacement method. Otherwise repeated use may look acceptable until somebody fits a different thickness and changes the contact geometry.

12 points
JO
JoFixtures
Replying to OwenAllen0312

Exactly, ask the toolmaker to specify the consumable and its fitting method with the fingers, otherwise maintenance gets handed a part number and a small improvisation exercise.

21 points
CH
ChloeBaker0483
Replying to NinaCarter1023

First samples were wiped especially for the demo. The later ones weren't. We're repeating with our normal incoming condition and adding release and pad replacement to the trial, no material winner yet.

4 points

Discussion closed

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