TB0257 Fault Finding Gripper Slip

Auteur avatarGareth Green | Dernière modification 30/09/2019 par Gareth Green en cours de rédaction

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Checklist of root causes for gripper slip issues

Technical Bulletin

TB Number: 257
Originator: Gareth Green
Machine: All
Date: 11/07/14
Circulate to: Service
Title: Gripper Slip

Symptoms

Code Description                                                             
Accuracy Issues

Gripper moving no profile

Gripper Slip Error Message
Slots wrong length
Operation in wrong place
Bar missing from queue
Incorrect bar length measurement
Bar does not eject properly
Piece length wrong

                                                          

Actions / Checks

Code Description Tick
Is it on all profiles
Is gripper bent or worn

Is gripper loose

Clean teeth?

Recently Replaced

Prior to problem? Collision
Check rollers free to turn and clean
Blunt tools / correct tools
Clamp pressures
Gripper positions correct for profile
Zip gate and clacker heights ok
Bits of machine caught in V notch (esp rear)
Clutch / clutch relay stuck on
Faulty gripper sensor
Loose gripper heel / insert
Spirol pin in zip gates sticking up
Gripper pressure
Gripper datum position correct / G axis parallel
Water in Air system
Split air pipe / air leak

Faulty gripper cylinder

Incorrect gripper for profile
Faulty Valve
Gasket of profile catching
Gripper sensor wire
Check profile spec – web where gripper sits
Profile too cold and shatters
Profile too wet and slips
Correct profile loaded
[A2001-A2004 Sturtz Grippers] Clevis pin is floating causing lock-up

          

Root Causes

Code Description Tick
Gripper bent

          

Commentaires

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