504,064 active members
3,083 visitors online
Register for free
Results 1 to 3 of 3
  1. #1

    Join Date
    Jun 2019

    Post Servo Motor Fault

    Recently a servo motor was replaced on the machine, for the z-axis.

    The driver is throwing a fault error.

    The servo is a new Hansen with a provided pigtail for the optical encoder. The exact product is not listed on their site.

    Unfortunatly, the supplier has no wiring diagram.

    We've followed their trouble shooting instructions:
    - ensure power is connected properly.
    - We've double checked the correct pigtail is in use on the encoder.
    - verrify connection cable
    - verify female jack on controller
    - modified the pots per original documentation

    Everything checks out, but as soon as we move the z-axis, the servo moves one tick then the encoder indicates a fault.

    Any suggestions would be helpful.

  2. #2
    Join Date
    Nov 2012

    Re: Servo Motor Fault

    First I would rotate the encoder by hand and see if EnA and EnB are changing.

    If the signals from the encoder are OK, I would try swapping EnA and EnB (or reversing the motor leads if that's easier).

  3. #3

    Join Date
    Jun 2019

    Re: Servo Motor Fault

    This seems like very high-level troubleshooting. I appreciate this, now I know where to search for my next step.

    Pre-search: I assume I'm going to find a din or similar for the hand rotation as the encoder in a fixed position. I do see that EnA and EnB are labeled - and originally expected the wiring wasn't correct.

Similar Threads

  1. Fixed position off fault on Fanuc 18i spindle servo motor.
    By Jason 105 in forum Community Club House
    Replies: 0
    Last Post: 07-29-2013, 05:29 PM
  2. Multicam HELP? 3000 motor fault Multicam motor fault (0x 4
    By murfeedean in forum Multicam Machines
    Replies: 0
    Last Post: 11-05-2012, 02:22 PM
  3. 139 x motor z fault and occasional ground fault
    By duckslayer in forum Haas Mills
    Replies: 4
    Last Post: 05-10-2012, 01:50 PM
  4. VCE-750 with BLDC Servo - X Axis Servo fault
    By kostner in forum Haas Mills
    Replies: 6
    Last Post: 10-23-2011, 08:09 PM
  5. Replies: 3
    Last Post: 05-18-2011, 05:26 AM

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