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Hoddem's DIY Linear Actuator

Discussion in 'DIY Motion Simulator Projects' started by Hoddem, May 23, 2017.

Page 17 of 17
  1. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
    AC motor, Motion platform, 4DOF, 6DOF

    The whine depends on the quality of the electrical installation of your home. I have terrible whining on my 110v home installation as there is NO ground in the outlets and even with 220v power converter the whining just gets worse.

    When I use the the 220v outlet in my garage which has two 110v phases and Neutral as ground (L1, L2, Neutral) I get very little whining. But the Neutral at my home sits 60v ac higher than the supposedly Ground on my 110v outlets in the garage...


    For comparison I get same whining from the Syntron HS drives that are much higher quality and double the price, because of the poor electrical installation at my home.


    BUT I tried both servos at my work outlets (Commercial grade electrical installation), and I get NO WHINE AT ALL from both of them, either by using 110v to 220v step-up power converter or straight on the 220v outlets...




    So before start blaming the servos, perhaps you should have an electrician check the grounding on the outlets of have him install a dedicated proper circuit with real ground etc...
    • Like Like x 1
    • Agree Agree x 1
    • Informative Informative x 1
    Thanos, Oct 23, 2019
    #321
  2. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    Thanos, Oct 24, 2019
    #322
  3. thefost

    thefost Member

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    Hi Hoddem, I was curious if you ended up going with a normal or inverted 3dof actuator build. I'm hoping you are going inverted so I can copy some of your work =D
    thefost, Dec 5, 2019
    #323
  4. Hoddem

    Hoddem Well-Known Member

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    As of right now I am still trying to decide. On one hand I can do a 3 or 4 actuator system (3dof) and lift it off the ground to allow all of the electronics to be housed underneath.
    This is kind of what I was thinking for the base. This would not be inverted actuators, however it would be easy to do the inversion with this design.

    upload_2019-12-5_16-3-25.png


    However if I did 3 actuators that would leave a 4th for traction loss which I think would be a nice addition. That does add a lot of complexity though, especially if I keep it elevated.

    I still need to get my servos setup and tested, I do seem to be affected by the high frequency noise that the servo drives emit though so servos may not work for me in the end.
    Hoddem, Dec 5, 2019
    #324
  5. thefost

    thefost Member

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    Thanks for the update Hoddem. Yeah I'm also not sure if I want go 3DOF or 4DOF adding traction loss. I would ideally like to do something like this, but the added complexity might be too much to do on my own: . Bummer on the high frequency noise, that is concerning.
    thefost, Dec 6, 2019
    #325
  6. Hoddem

    Hoddem Well-Known Member

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    • Like Like x 5
    Hoddem, Feb 17, 2020
    #326
  7. Arta Yasa

    Arta Yasa Member

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    Hi sir it is posible to used 110mm travel ball screw sir?? Just for 2dof, or if posible for 4 dof sir
    Arta Yasa, Sep 19, 2021
    #327
  8. Hoddem

    Hoddem Well-Known Member

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    This design is outdated, I would suggest you look at the SFX-100 project. Its a much simpler build and probably more suited for your task.
    Hoddem, Sep 23, 2021
    #328
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