Need Help! Zaxis tach gen disconnect alarm


Results 1 to 5 of 5

Thread: Zaxis tach gen disconnect alarm

  1. #1
    Registered
    Join Date
    Jul 2011
    Location
    USA
    Posts
    5
    Downloads
    0
    Uploads
    0

    Default Zaxis tach gen disconnect alarm

    How do I determine if my problem is with the tach gen or servo board? All connections are solid. Board is Fanuc A20b 1001 0770 04B servo is AC Fanuc "red cap". Are schematics available? Any test I can perform w/o-scope etc?

    Similar Threads:


  2. #2
    Community Moderator Al_The_Man's Avatar
    Join Date
    Dec 2003
    Location
    Canada
    Posts
    24216
    Downloads
    0
    Uploads
    0

    Default

    The Red Cap, (AC servo's) do not usually use a DC tach in the sense the DC ones did, at least I have never come across a AC motor that uses a tach?
    The encoder usually performs all position and commutation duties.
    Al.

    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.


  3. #3
    Registered
    Join Date
    Jul 2011
    Location
    USA
    Posts
    5
    Downloads
    0
    Uploads
    0

    Default

    Hi Al,
    Thanks for the reply. There is an encoder on the end of the servo. On the screen it is displayed as tach gen. disconnect. however when X comes up it refers to a pulsecoder disconnect?



  4. #4
    Community Moderator Al_The_Man's Avatar
    Join Date
    Dec 2003
    Location
    Canada
    Posts
    24216
    Downloads
    0
    Uploads
    0

    Default

    It is more likely you have a problem either with the encoder or the cable.
    First measure the continuity through to each end of the cable.
    Al.

    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.


  5. #5
    Registered
    Join Date
    Jul 2011
    Location
    USA
    Posts
    5
    Downloads
    0
    Uploads
    0

    Default

    Had checked all wiring and connectors. Continuity checked OK. Do you know of any checks I can perform to prove out the encoder?



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

Zaxis tach gen disconnect alarm

Zaxis tach gen disconnect alarm