Z lift


Results 1 to 9 of 9

Thread: Z lift

  1. #1
    Member
    Join Date
    Apr 2017
    Location
    United Kingdom
    Posts
    77
    Downloads
    0
    Uploads
    0

    Default Z lift

    Hi

    Im having a issue where when i zero my z and start to cut after about 10 mins in the cut the z axis has moved higher than when it was originally zeroed.

    can anyone point me in the right direction on how to trouble shoot this?

    Similar Threads:


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

    Default Re: Z lift

    Decrease your Z axis acceleration by 25%-50%, and see if that helps.

    How much is it out of position?

    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
    Apr 2017
    Location
    United Kingdom
    Posts
    77
    Downloads
    0
    Uploads
    0

    Default Re: Z lift

    Quote Originally Posted by ger21 View Post
    Decrease your Z axis acceleration by 25%-50%, and see if that helps.

    How much is it out of position?
    the longer the job carries on the more it goes out.

    Ive also tested this without actually cutting into the material and i get the same results. Ill try decreasing acc and see what happens



  4. #4
    Member
    Join Date
    Apr 2017
    Location
    United Kingdom
    Posts
    77
    Downloads
    0
    Uploads
    0

    Default Re: Z lift

    Quote Originally Posted by ger21 View Post
    Decrease your Z axis acceleration by 25%-50%, and see if that helps.

    How much is it out of position?
    I have tried reducing acceleration and it still does it.

    Ive removed the spindle and ran the code without that attached and it still lifts.

    I zero it run the job for one minute and then go back to zero and the high of the z has moved up.

    Not sure what else to try any suggestions?



  5. #5
    Registered
    Join Date
    Apr 2016
    Location
    Macedonia, The Former Yugoslav Republic Of
    Posts
    12
    Downloads
    0
    Uploads
    0

    Default Re: Z lift

    Did you try to change steps per unit? Does the spindle goes as high or as low you say to go?

    Sent from my HTC Desire 620G dual sim using Tapatalk



  6. #6
    Member
    Join Date
    Mar 2013
    Location
    United States
    Posts
    140
    Downloads
    0
    Uploads
    0

    Default Re: Z lift

    Does the machine have gas struts or pneumatic cylinder to assist the z axis against gravity?



  7. #7
    Member
    Join Date
    Apr 2017
    Location
    United Kingdom
    Posts
    77
    Downloads
    0
    Uploads
    0

    Default Re: Z lift

    Quote Originally Posted by manofmanyhats View Post
    Does the machine have gas struts or pneumatic cylinder to assist the z axis against gravity?

    not on my china cnc



  8. #8
    Member
    Join Date
    Mar 2013
    Location
    United States
    Posts
    140
    Downloads
    0
    Uploads
    0

    Default Re: Z lift

    With power not going to the z axis motor, can you move the axis by turning the ballscrew? Is it difficult?

    Could be alignment issues, could be linear bearings issue etc.



  9. #9
    Member
    Join Date
    Apr 2017
    Location
    United Kingdom
    Posts
    77
    Downloads
    0
    Uploads
    0

    Default Re: Z lift

    Quote Originally Posted by manofmanyhats View Post
    With power not going to the z axis motor, can you move the axis by turning the ballscrew? Is it difficult?

    Could be alignment issues, could be linear bearings issue etc.
    I've sorted this now.

    I swapped the stepper motors around and stepper drivers but I noted on aspire I was performing a pocket but using a profile tool path instead of a pocket. but which ever of the above seemed to fix the issue.

    Sent from my SM-N910F using Tapatalk



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

Z lift

Z lift