Concrete filled tubing

New Home Forum Mostly Printed CNC – MPCNC Advice – MPCNC Concrete filled tubing

This topic contains 5 replies, has 4 voices, and was last updated by  Barry 3 days, 17 hours ago.

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  • #44637

    Ryan
    Participant

    Do you thing that filling the outside tubes with concrete would have a noticeable impact on the overall rigidity of the system? You would not want to fill the tubes that cross in the middle as it would add a lot of mass that the motors have to move around.

     

     

    #44639

    Barry
    Participant

    This gets asked often enough it should be stickied.  It will add some, but not really worth the hassle.  Mid span supports are way easier.

    #44653

    Ryan
    Keymaster

    Stuck!

    #44654

    Ryan
    Keymaster

    How it works isa single set of  mid span supports add more than 4x’s the rigidity, concrete would not and make a huge mess.

    #46187

    rozzy
    Participant
    How it works isa single set of mid span supports add more than 4x’s the rigidity, concrete would not and make a huge mess.

    Is there a STL file for mid span supports?

    #46188

    Barry
    Participant
    How it works isa single set of mid span supports add more than 4x’s the rigidity, concrete would not and make a huge mess.

    Is there a STL file for mid span supports?

    https://www.thingiverse.com/thing:1160962

    I just used what’s in the second picture.   Just drilled a hole in the tube, and used a locknut on the bottom of the tube to hold it.  Nothing inside the tube is really needed, it just keeps it from sagging.

    IMG_20160901_161537-1

     

    1 user thanked author for this post.
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