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Hoddem's DIY Linear Actuator

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

  1. Thanos

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

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    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...
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  2. Thanos

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

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  3. thefost

    thefost New 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
  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.
  5. thefost

    thefost New 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.