Problem 401 Servo Alarm - Lathe works if holding power button


Results 1 to 2 of 2

Thread: 401 Servo Alarm - Lathe works if holding power button

  1. #1
    *Registered User* adamtc860's Avatar
    Join Date
    Oct 2018
    Posts
    1
    Downloads
    0
    Uploads
    0

    Default 401 Servo Alarm - Lathe works if holding power button

    After running 5 or so parts, I loaded the next one in and pushed "GO"
    While facing, the part came out of the chuck, shattered my insert and threw 3 alarms:

    401: Servo alarm (VRDY OFF)
    1018 Turret too slow
    1027: Pressure lost

    I was able to move the turret away from the spindle.
    When turning the machine on, I have to hold the power button and no alarms are thrown.
    I can change tools, turn the spindle, and move x and z axis.

    As soon as I let off the power button, the errors appear.
    Any help would be appreciated!

    GE Fanuc OT Control

    Similar Threads:


  2. #2
    Member
    Join Date
    Apr 2011
    Location
    USA
    Posts
    841
    Downloads
    0
    Uploads
    0

    Default Re: 401 Servo Alarm - Lathe works if holding power button

    Sounds like you have tripped an overtravel switch. These switches are generally wired normally closed. So when you make the switch the signal from the switch turns off. The problem is many builders run all the switches in series so if one drops they all drop. They could have ran it to an alarm but they sometimes just choose to kill the ESTOP. You can move everything with the power on button being held as a means to be able to move the axis off of the overtravel switch. (Overtravel Bypass) Your problem is you are not on the overtravel switch so you can never clear this by moving the axis around. You will have to find out which switch or wire feeding the switch(s) is bad.



Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

401 Servo Alarm - Lathe works if holding power button

401 Servo Alarm - Lathe works if holding power button