Sand filled Tubes

This topic contains 5 replies, has 6 voices, and was last updated by  Josh 6 months ago.

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  • #96934

    Ryan Chin
    Participant

    I saw this video on roller coaster sound dampening:

    https://www.youtube.com/watch?v=Qx4RnlsXAV0

    Has anyone tried filling the tubes with a particulate or otherwise damping material?

    Would it reduce vibrations/sound? Or would it just make the tubes sag?

    Finally, is it worth the inevitable mess to test?

    #96935

    Barry
    Participant

    Sag.  Almost all the noise is coming from the spindle, then the endmill.

    #96936

    Jamie
    Participant

    Even relatively quiet spindles are very loud from the sound of cutting, so you would never hear a difference.

    For a plotter or vinyl cutter or 3d printing application, I would think the stepper drivers (e.g. trinamic in place of A4988 or DRV8825) would be the next best investment for sound.  I doubt you would hear the difference of the sound damping rails without a machine that is already very, very quiet.

    #96950

    WarHawk8080
    Participant

    Sprayfoam?

    No added weight but could reduce vibration

     

    #96969

    Jeffeb3
    Participant

    On my sand table I use trinamics and I used shrink wrap around the conduit. They both helped the noise, I think. The ZXY is more tolerant for a little diameter change. I wouldn’t do that on an MPCNC just because the noise is not as important in the shop.

    #96980

    Josh
    Participant

    Last night I ran a 1/4″ poly tube through a 48″, 3/4″ conduit that was 48″ long, then filled it with 50/50 epoxy/micro baloons.  The empty tube deflected .025″ with a 5lb weight.  I dont think I’m going to gain much.

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