584,850 active members*
4,517 visitors online*
Register for free
Login
Results 1 to 5 of 5
  1. #1
    Join Date
    Feb 2008
    Posts
    42

    Meaning of G28?

    Hello

    Does anyone know what G28 means, in use with Mazak machines??

    :rainfro:

  2. #2
    Join Date
    Jun 2008
    Posts
    150
    I,m no coder, but in EIA it means return to No1 home or reference position, as in G00G28XYZ0. G00G30XYZ0=Return to No.2 home or ref. pos. In Mazatrol you just specify the axis to be returned?
    Lee

  3. #3
    Join Date
    Mar 2005
    Posts
    988
    As Leelund said, it means reference return position 1. Basically, its the machine home position in any of the axis you comman. However, make sure you are in G91 when doing this like:

    G0G91G28Z0

    Most programmers will seperate moves to avoid crashes like this:

    G0G91G28Z0
    G28X0Y0.
    It's just a part..... cutter still goes round and round....

  4. #4
    Join Date
    Dec 2003
    Posts
    24216
    If you command a position other than 0 it will move to this intermediate position and then 0.
    I believe this also applies to Mazak.
    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
    Join Date
    Nov 2006
    Posts
    174

    Via

    G28 = Return to home position via a programmed position from your datum.

    G28G91X0Y0Z0 will move to home via an incremental move of zero.

    G28X0Y0Z0 will move home after the cutter has moved to absolute X0Y0Z0.

    Another way to explain the same thing.

Posting Permissions

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