I had an issue yesterday with a cell. The cell is quite tight and contains two i710 robots, so have had to create collision zones between them for certain moves. It has been in and running with full functionality since Christmas but yesterday they collided resulting in damage to the robot mounted field IO module and cables.
My concern is that the collision zone call is in a similar place in both robots, could this have caused an issue? I have tried to recreate the fault in manual and ran both robots from the TP's (T1 50%) and each time they stop and wait for the relevant input back from the PLC, even tried running both collision zone calls simultaneously (with another person on the other TP and R100 took precedence as i expected.
The only differing factor i can think of is the speed - but it was during a production break so i didn't have time to run in manual at 100% T2.
I simply can't fathom how it has happened. I'm going to install a space check as a 'belt and braces' check but if anyone has had this happen before then please shout up!