Results 1 to 6 of 6

Thread: J325 Spindle repeatability

  1. #1
    Registered ramsey321's Avatar
    Join Date
    Feb 2010
    Location
    us
    Posts
    47
    Downloads
    0
    Uploads
    0

    J325 Spindle repeatability

    I just got my 325 Tree fired up and I made a few projects without any issues but now I am having a problem with repeatability with my Z motion. It seems the spindle wont orient to the same spot when running a program or when setting a tool hieght. It varys between .010" to .020" if not more. What could be causing this issue?


  2. #2
    Registered
    Join Date
    Jan 2011
    Location
    USA
    Posts
    3
    Downloads
    0
    Uploads
    0
    I'm having a similar issue with our 325, was advised to tune Zaxis servo. Still not quite sure what that entails...

    Marshall


  3. #3
    Registered
    Join Date
    Feb 2009
    Location
    usa
    Posts
    4,000
    Downloads
    0
    Uploads
    0
    If it varies with no alarms, check the timing belt and pulleys. Also check for heat on the quill. It's common to have repeatability issues if the spindle bearings are going. It heats the quill up, sticking it in the bore. Also check to see how much the spindle pushes out when you hit tool unclamp.


  4. #4
    Registered
    Join Date
    Jun 2004
    Location
    United States
    Posts
    40
    Downloads
    0
    Uploads
    0
    I had that problem with a Tree Millienium. Turned out to be the z-axis ball screw preload nut had loosen. You will need to lift the servo motor and check.


  • #5
    Registered
    Join Date
    Jun 2004
    Location
    United States
    Posts
    40
    Downloads
    0
    Uploads
    0
    Oh, I should have said that the nut that will be loose is under the timing belt pulley for the z-axis ball screw. You still have to loosen the servo motor so you can get the timing belt and pulley off to check the nut.


  • #6
    Registered
    Join Date
    Nov 2010
    Location
    england
    Posts
    144
    Downloads
    0
    Uploads
    0
    errr..... pardon my ignorance, but are we talking about spindle orientation; "keylock" position we used to call it or, Z axis positioning for a tool change ?

    If its orientation; could be the spindle encoder, orientation sensor, cable, timing belt etc;

    If its Z axis positioning; could be pulley slippage, belt, motor encoder, tool change parameter etc;


  • Similar Threads

    1. Powering a Tree J325 in my garage
      By MadPickinSkills in forum Tree
      Replies: 4
      Last Post: 11-07-2010, 12:15 PM
    2. Need Help!- Tree J325 Spindle Problem
      By Frisbee in forum Tree
      Replies: 1
      Last Post: 09-29-2010, 03:18 PM
    3. Need Help!- Need help with new-to-me J325
      By Kevin77 in forum Tree
      Replies: 5
      Last Post: 08-18-2010, 10:51 AM
    4. Need Help!- J325 Knee Crank
      By lavrgs in forum Tree
      Replies: 7
      Last Post: 06-02-2010, 10:36 AM
    5. Newbie- Tree J325- First time start up-Help
      By J. Moran in forum Tree
      Replies: 5
      Last Post: 10-09-2009, 10:54 PM

    Posting Permissions


     


    About CNCzone.com

      We are the largest and most active discussion forum from DIY CNC Machines to the Cad/Cam software to run them. The site is 100% free to join and use, so join today!

    Follow us on

    Facebook Dribbble RSS Feed


    Search Engine Friendly URLs by vBSEO ©2011, Crawlability, Inc.