Fanuc TAST - TAST-004 STOP TAST IO start failed

    I have been struggling with this for a bit now and cant seem to get it figured out. We have a ARC Mate 120iD/12L w/ R-30iB Plus controller and a Miller Auto-Continuum 500. What we are welding is a 12' long boom for a crane and we had issues with the part crowning and bowing. I thought this would be a perfect solution for TAST, but it has been quite a struggle to get it going. I had it working for a day and then came back the next day and it stopped working. The failures are inconsistent, sometimes it will weld for 10 inches and then the next will only weld for 2 inches before displaying the TAST-004 alarm. The weld is a corner fillet and material thickness of 3/16", 1/4", or 5/16". I am attempting to use vertical and lateral tracking.


    I am at a loss for what to do, thank you in advance for your help!

  • Go to Best Answer

  • SkyeFire October 21, 2024 at 7:00 PM

    Approved the thread.
    • Best Answer

    I could just restart my weld and it would continue on welding for a random distance and stop again. I did attempt to do a cold start and that didn't fix anything, the error still persisted.

    I reached out to Fanuc technical support and this is what they send me after asking for a solution with the alarm TAST-004

    Quote

    I found a couple of variables in other TSL that resolved the alarm. Please set: $TG_MX_SCUS = 500 (it is presently set to 250). 2) Cycle power on the controller. Set the system variable $TG_SC_LEVEL = 0. Please let me know if you need anything else. Thanks and have a wonderful day

    After they sent me this I did more research about the variable $TG_MX_SCUS. Apparently it has to do with the usage of the CPU for the controller. From the factory Fanuc limits the CPU and it was too much information to process for tracking.

    Here is a link to another post about this variable

    Post

    RE: AVC Instead of TAST in 120 ic

    Very late reply but just in case you still need or anyone stumbles across this on google;

    Go to system variables when in control start and to the following;

    $AWECFG.$ARC_PROCESS

    When value 1 = TAST

    When value 2 = AVC


    The variable beneath $AWECFG is $AWECFGS – which is individual config parameters for each welding procedure available to be set up.
    All of the $ARC_PROCESS sub variables for each $AWECFG no's inside the header variable need changing to ensure tracking schedules change from TAST to AVC.
    …
    13radElliott
    April 7, 2021 at 9:18 AM


    As of now this has fixed my issue. Thanks for your help!

  • Joe P. October 24, 2024 at 8:25 PM

    Selected a post as the best answer.

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