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  1. #1
    Join Date
    Sep 2006
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    Collie,WA
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    Default Ball Screw problem

    I bought a X6-1500GT cnc router 2 years ago and have recently developed a problem with the y axis ball screw.
    I is free in one direction but it binds in the other direction.
    I have ordered a new one but will pull the old one down to try and find the cause of the problem.
    Has anyone come across this sort of problem before?
    Steve

  2. #2
    Join Date
    Jun 2008
    Location
    Victoria, Australia
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    Default

    Quote Originally Posted by Sterob View Post
    I bought a X6-1500GT cnc router 2 years ago and have recently developed a problem with the y axis ball screw.
    I is free in one direction but it binds in the other direction.
    I have ordered a new one but will pull the old one down to try and find the cause of the problem.
    Has anyone come across this sort of problem before?
    Steve
    Is it the ball screw or is the mounting? if it only binds one way it might be the mounting at one end.

    Ray

  3. #3
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    Sep 2006
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    Default

    Its the Ball Screw. I pulled it out of the machine.

  4. #4
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    Jun 2008
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    Default

    Only at one spot, or does it bind in all positions along the length?

    Ray

  5. #5
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    Default

    It appears to be binding along the whole length as the stepper motor looses steps along the whole length.
    Its too hard to wind the ball nut, by hand, for the whole 700 mm...lol
    Steve

  6. #6
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    Jun 2008
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    Default

    Quote Originally Posted by Sterob View Post
    It appears to be binding along the whole length as the stepper motor looses steps along the whole length.
    Its too hard to wind the ball nut, by hand, for the whole 700 mm...lol
    Steve
    Hi Steve,

    Sounds like the balls only like recirculating in one direction, so that might point to the recirc tube. Any signs of damage to the tube?

    Ray

  7. #7
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    Sep 2006
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    Collie,WA
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    Default

    I have not removed the screw nut as i wanted to find a replacement. One is on its way so when I get a chance ( Im on the road atm ) I will pull it down and post some photos.

    Weird that the balls only like moving one way. ....maybe some swarf has been drawn inside...somehow....
    Steve

  8. #8
    Join Date
    Dec 2015
    Location
    Melbourne
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    200

    Default

    certainly sounds like something has managed to find its way inside the ball nut.

  9. #9
    Join Date
    Sep 2006
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    Collie,WA
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    Default

    I pulled the nut off today. ( of course, I lost a couple of balls...grrr....I have 46. I guess I am supposed to have 48 ish ...3 rows of balls..)
    I cannot really see a problem although I don't know what I'm looking at. No swarf or bits of metal came out.
    It seems a bit dodgy inside the nut but maybe that's how they are supposed to be...lol

    I think its going to be a nightmare trying to get them back in...even with a mag lamp......
    The balls are 3.18 mm ( 1/8" , so I can get some more. )

    20160614_130102 (Small).jpg20160614_130107 (Small).jpg20160614_130123 (Small).jpg

  10. #10
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    Jun 2008
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    Default

    I wouldn't bother putting them back... it's a bit hard to see but that thread looks pretty bad. It should be a smooth track all the way through.

    Ray

  11. #11
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    Sep 2006
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    Default

    My new Ball Screw arrived today.
    Good news...Its the right one.....lol
    The nut itself looks a little different, so maybe they have changed it for a better design.

    The screws appear to have the same finish so I guess the old screw may be ok for a spare, if I need it.

    20160620_155553 (Small).jpg20160620_155559 (Small).jpg

    Now to find the time to re-install it and ensure it runs smoothly.

    Steve

  12. #12
    Join Date
    Jun 2016
    Location
    Sydney
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    153

    Default

    Quote Originally Posted by RayG View Post
    I wouldn't bother putting them back... it's a bit hard to see but that thread looks pretty bad. It should be a smooth track all the way through.
    That thread was smashed! Replace!!!
    Cheers
    Roger

  13. #13
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    Default

    Quote Originally Posted by rcaffin View Post
    That thread was smashed! Replace!!!
    Cheers
    Roger

    Yep...I'm onto it....lol

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