non round circles


Results 1 to 4 of 4

Thread: non round circles

  1. #1
    Member
    Join Date
    May 2009
    Location
    United States
    Posts
    98
    Downloads
    0
    Uploads
    0

    Default non round circles

    My gantry is set up with Mach 3 mill and runs DC servo motors via Gecko drives. I have the axis tuned so they travel the exact distance on a linear move. The problem
    I have is circular pockets do not come out round. Is there somthing besides the linear tuning I can look at to improve the concentric result?
    Thanks,
    Scott

    Similar Threads:


  2. #2
    Member ger21's Avatar
    Join Date
    Mar 2003
    Location
    Shelby Township
    Posts
    35538
    Downloads
    1
    Uploads
    0

    Default Re: non round circles

    If you slow down the feedrate and the holes are more round, it's probably due to flex in the machine.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  3. #3
    Member
    Join Date
    May 2009
    Location
    United States
    Posts
    98
    Downloads
    0
    Uploads
    0

    Default Re: non round circles

    Thanks for the suggestion. I will give that a try
    Scott



  4. #4
    Member awerby's Avatar
    Join Date
    Apr 2004
    Posts
    5737
    Downloads
    0
    Uploads
    0

    Default Re: non round circles

    It could also be due to backlash. That happens when a screw changes direction; there's a point where the threads shift from pressing on one side to pressing on the other. While it's doing that, the motor will turn but the axis won't move, so a circle will be distorted.

    [FONT=Verdana]Andrew Werby[/FONT]
    [URL="http://www.computersculpture.com/"]Website[/URL]


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

non round circles

non round circles