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Question Reduce Wormdrive "Clacking" and rig vibrations

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by PMK, Apr 4, 2021.

  1. PMK

    PMK Member

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    Does anyone know how to reduce the "Clacking" noise that comes from worm drive motors on direction changes?

    I've got my rig setup super nicely and love the motion from it, it's just super loud...

    I think most of the noise comes from the play / slack in the wormgears so it "slams" on direction change and makes a pretty audible noise. The play in the gearboxes also seems to rattle with the bass shakers I have setup making the whole rig pretty loud.

    Im currently using these motors/gearboxes from Motion Dynamics.

    https://www.motiondynamics.com.au/worm-drive-motor-12v-24v-200w-180-rpm-20nm-torque.html

    Is it worth upgrading to their commercial full metal gearbox or are they the same construction/tolerance?
    PMK, Apr 4, 2021
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    Slight positive weight bias balance will help pre-load backlash, but won't eliminate it, as backlash is inherent in a wormdrive design.

    Some use gas lift struts or bungee cords, but keep in mind that adds load to a motor.
    • Like Like x 1
    noorbeast, Apr 4, 2021
    #2
  3. PMK

    PMK Member

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    PMK, Apr 4, 2021
    #3
  4. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    I avoid Google products and services, so what type of rod ends are you using, rose joints or traditional tie rod ends, and in either case can they be lubricated?
    noorbeast, Apr 4, 2021
    #4
  5. PMK

    PMK Member

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    Using rod ends like this
    s-l400.jpg

    Dropbox link to the video
    https://www.dropbox.com/s/nclhun4xyjn1z1j/20210404_113707.mp4?dl=0

    I can lubricate them but I'm not sure if that would solve anything? They rotate fine, I guess using some thick grease might pack in any play they have?
    PMK, Apr 4, 2021
    #5
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    noorbeast, Apr 4, 2021
    #6
  7. PMK

    PMK Member

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    Rotation doesn't seem to be an issue. I think it's the actual joint rattling inside the socket, I don't have a grease gun but I could try and lube them with some thick grease to at least dampen some of the play.
    PMK, Apr 4, 2021
    #7
  8. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    Some rose joints come with grease nipples, but obviously yours don't.

    If the joint itself is worn to the point of rattling then likely it needs replacing.
    noorbeast, Apr 4, 2021
    #8
  9. Gadget999

    Gadget999 Well-Known Member

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    My Motion Simulator:
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    Turn the rose so it sits sideways in the joint

    Tap the end of the joint with a hammer !

    The slack has now gone !
    Gadget999, Apr 4, 2021
    #9
  10. PMK

    PMK Member

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    So I bought some wheel bearing grease and packed it into the joints, seems to have worked perfectly! Everything is much more quiet now.
    • Like Like x 2
    PMK, Apr 10, 2021
    #10