The tray looks fixed, but the grip looks crooked - tray loading

PriyaAli0220 · 28 Mar 2026, 22:44 UTC

Closed
PR
PriyaAli0220
Our setup uses Fairino FR10 for tray loading with a small polymer housing in a supervised production bench. We've repeatedly adjusted pickup points as handling becomes unreliable. Although the tray appears unchanged, the grip no longer looks as square. I'd like an inspection sequence that helps us identify the cause before making further teaching changes or attributing it to the arm

18 replies

AD
AdaAbbott0042
Replying to PriyaAli0220

Does the angle change before contact or as the fingers close? Existing footage may help you locate where things start going wrong.

24points
PR
PriyaAli0220
Replying to AdaAbbott0042

In the footage, it sits consistently in the checked fixture and turns during gripping. So the crooked position isn't there at the start

10points
AD
AdaAbbott0042
Replying to PriyaAli0220

@PriyaAli0220 Preserve the current settings and pause further nudges. Have maintenance inspect finger mounting, contact surfaces and tray seating under the proper isolation procedure, using that observation to guide the checks.

9points
PR
PriyaAli0220
Replying to AdaAbbott0042

I've checked the maintenance history and found a pad replacement preceding the initial pickup-point correction. That establishes a relevant sequence of changes to investigate

6points
AD
AdaAbbott0042
Replying to PriyaAli0220

@PriyaAli0220 That sounds like the pad replacement caused it. Check the installation against the specified arrangement.

18points
VI
VictorBaker0446
Replying to AdaAbbott0042

The sequence makes pad installation worth investigating, but it doesn't establish causation. Fixture variation remains a possible contributor even with that maintenance history.

7points
AD
AdaAbbott0042
Replying to VictorBaker0446

Agreed, I called it too early. Treat the replacement as a lead; verify installation and contact condition alongside tray location before assigning the cause.

19points
LO
LouisArcher0398
Replying to AdaAbbott0042

On my own setup, we found worn contact surfaces and inconsistent tray seating together. Fixing only the pickup point made the symptoms move around

10points
PR
PriyaAli0220
Replying to LouisArcher0398

@LouisArcher0398 How did you keep those two effects apart? Ours already has enough point edits to make the history messy

17points
LO
LouisArcher0398
Replying to PriyaAli0220

We kept a known reference configuration and had maintenance check one condition at a time. We didn't roll back points blindly after finding wear

2points
ZA
ZaraChen1178
Replying to LouisArcher0398

@LouisArcher0398 Why not just go back to the original points once the gripper's checked? Aren't those the good ones?

11points
AD
AdaAbbott0042
Replying to ZaraChen1178

Only if they match the verified setup. Tooling, frames or presentation may have changed; your responsible technician should compare the configuration before any supervised validation.

6points
PR
PriyaAli0220
Replying to AdaAbbott0042

The relationship between the initial points and the present setup hasn't been verified. I'm retaining the current configuration instead of assuming the original positions would restore a known condition

8points
VI
VictorBaker0446
Replying to PriyaAli0220

Good. Also, 'tray looks the same' isn't a seating measurement. Your pre-contact observation helps, but it doesn't cover every tray replacement.

6points
PR
PriyaAli0220
Replying to VictorBaker0446

The supervised comparison found seating variation as well as worn gripping surfaces. So we really do have more than one thing to investigate

8points
ZA
ZaraChen1178
Replying to PriyaAli0220

Would you clean the pads or replace them? I can't tell where routine cleaning stops being enough

3points
AD
AdaAbbott0042
Replying to ZaraChen1178

Use the tool maker's maintenance criteria and a qualified inspection. Appearance alone won't tell you whether cleaning restores an acceptable contact surface.

6points
LO
LouisArcher0398
Replying to AdaAbbott0042

i kept photos of my setup's contact surfaces with the maintenance notes. They helped explain what had changed without relying on 'it used to look better'

15points

Discussion closed

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