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IndustryArena Forum > MetalWorking Machines > Haas Machines > Haas Mills > Alarm 166- Y return margin too small TM-1
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  1. #1
    Join Date
    Jan 2009
    Posts
    12

    Alarm 166- Y return margin too small TM-1

    Have been having alarm 166 (Y return margin too small) error upon zeroing all axis on startup. I have replaced the mechanical Y axis limit switch to no avail. I checked the switch connections for tightness as well as the servo-motor connectors. I have had this problem before and cleaned the limit switch and it solved the problem but not this time. I also checked the arm that contacts the switch to trigger it and it appeared tight and not bent or damaged. Waiting on my HFO to respond but I though I throw this out on the forum to see if anyone has encountered this problem and found the solution. Thanks in advance.

    Robin

  2. #2
    Join Date
    Nov 2003
    Posts
    236
    If you have replaced the switch then the grid offset should be reset. The value is in encoder counts and should be between 1/8 to 7/8 of a revolution.

  3. #3
    Join Date
    Jan 2009
    Posts
    12
    Thanks for the quick response! I do not know anything about the grid offset or how to set this. I suppose this is done through parameters and settings. Would you be so kind as to elaborate on how I do this.

    Thanks, Robin A.

  4. #4
    Join Date
    Nov 2003
    Posts
    236
    This is not really my area of expertise. I would suggest that you call the Haas Factory service department at 805-278-8500 and they should be able to help walk you through it.

  5. #5
    Join Date
    Nov 2003
    Posts
    236
    Robard,
    I have been told by the service engineer that he tried to send you an email and it did not work. Can you please email me and I will forward his email to you.

    [email protected]

  6. #6
    Join Date
    Jan 2009
    Posts
    12
    done, thanks

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