seanp123

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Posts posted by seanp123

  1. Posted

    7 minutes ago, BobLfoot said:

    Question 1 - Was the system running normally and malfunctioned or is this a new installation?

    Definitely not a new installation, we just had an outage (unfortunately it was a 6 year major rebuild) so you can imagine how many things were touched :).

    9 minutes ago, BobLfoot said:

    Question 2 - Have you checked your setup parameters? - I had a servo one time where someone fat fingered the max speed to 200 mm/sec and the move speed to 1800 mm/sec.  Everytime it tried to move it was over the limit until we changed the limit to 2000 mm/sec.

    I looked at what I think are the parameters and none of them seemed to have changed. I even deployed an old version of code to make sure that someone didn't change anything and we're still having the issues

     

    10 minutes ago, BobLfoot said:

    Question 3 - I'd check and make sure you don't have noise in the system.  This might cause what you're seeing.

    Any thoughts ? Thats what it sounds like to me too, but we've changed out the feedback cable and even put a free-spinning motor connected to new cables on the drive and immediately got the same error.

  2. Posted

    Hi all,

    I'm having an issue with one of the Kinetix6000 allen bradley servo drives on a filling line that I support. This particular servo motors controls the rotary movements of a series of pumps to ensure accurate dose timing. Every time that I start up the machine, the PLC (Controllogix L7 firmware v28) executes a homing sequence to ensure the servo finds its 0 point. However, the servo in question keeps getting an 'Overspeed Fault' (E55). So far in troubleshooting, we've basically changed every component. We replaced the drive, feedback cable to the drive, and even hooked up a new free-spinning motor directly to the drive. Every component change has resulted in the same Overspeed error shortly after the homing sequence starts. To try and rule out a mechanical issue, I even disabled the homing sequence in the PLC and tried to move the motor using Motion Direct Commands. Immediately after a MSO command, the drive faults out for OverSpeed even with no motion. The last bit of troubleshooting we swapped the position of two of the drives, but the same OverSpeed fault happened on the drive connected to the rotary movement motor.

    At this point, I'm even considering changing the sercos fibers and the Kinetix power rack. Has anyone experienced anything like this before, or have advice on what to try to make it work? Thanks in advance for all your help