1. #1
    This is a strange one, but Im not sure if its normal. If I apply a little pressure to the bottom of the Z axis and lift it up it will move a few mm. Is this normal, could it be the couplers?

    Just wondering as my carvings are developing lines across them from where the Z axis isnt returning back to the same spot.

    Cheers, Phil

  2. #2
    That's a LOT of play. Something needs tightening.

  3. #3
    Quote Originally Posted by Philly View Post
    This is a strange one, but Im not sure if its normal. If I apply a little pressure to the bottom of the Z axis and lift it up it will move a few mm. Is this normal, could it be the couplers?

    Just wondering as my carvings are developing lines across them from where the Z axis isnt returning back to the same spot.
    if you bought 1605 screws nuts and bearings from china you may need to add a spacer between the angular contact bearings (all of them) they are mounted as if they are matched pairs that only need pressing together however they are not matched and no matter how much you press them together they do not pinch.

  4. #4
    Right, I've managed to check in the daylight and it appears the coupler is one of those springy type ones and its allowing the whole z axis to move. Going to order a normal coupler, anyone have any recommendations?

    Thanks

  5. #5
    Somethings wrong with the setup as the coupler is there to protect the motor bearings.
    Sounds as if the end bearing setup is all wrong, it should turn but have little or no play.
    Peter

  6. Show us a photo of your setup buddy

  7. #7
    Quote Originally Posted by AdCNC View Post
    Show us a photo of your setup buddy

    Will do, charging camera now.

  8. #8
    If you are using the coupling to support the load then it is all wrong, the coupling in only used to transfer the torque from the motor to the screw and absorb any radial movement.
    They are not desigend to take any axial or radial load, also if you get a solid type then you will also have problems with movement becasue the motor will have a spring washer in the back and this will give about 0.5-1MM of movement.
    You need to use a bearing arrangement to take any radial or axial loadings and without this the system will fail.


    Quote Originally Posted by Philly View Post
    Right, I've managed to check in the daylight and it appears the coupler is one of those springy type ones and its allowing the whole z axis to move. Going to order a normal coupler, anyone have any recommendations?

    Thanks

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