I have a spacecraft which has a docking port with a cover over top it. How I do this is I attach my docking port to my command pod, then I temporally move the port out of the way to attach the piston to the command pod as well. Once the piston is connected, I then connect the port cover onto the piston itself, then move the docking port back into it's original position. The result is a hidden docking port that I can easily access by removing the cover. At the moment, I can only remove the cover by using the slider. What I would like to do is configure the piston's settings so that it responds strictly by activation group 2. I know there's a way to pull it off, but I'm not sure how exactly. I'm hoping somebody can explain it for me.

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    102 FLYGUY101

    @sflanker
    Has an update changed anything, because my pistons are no longer working either, still using this method.

    1.3 years ago
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    102 FLYGUY101

    @sflanker
    I just need to toggle on/off.

    1.3 years ago
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    Mod sflanker

    @FLYGUY101 I think the same concept would work fine with a motor. The input constant is just the power level. And the activation group controls whether it's on or off. If you wanted to target a fixed rpm or something that would be more complicated.

    1.3 years ago
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    102 FLYGUY101

    @sflanker
    Question for you, what can I do to make an electric motor run by an activation group? It's a little different than the piston as you can't really put a percentage on something that keeps on moving.

    1.3 years ago
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    Mod sflanker

    Kudos to the dev team for making that magically work. It was just a stab in the dark but I was thrilled to see it work (and I verified the behavior for different numeric values).

    +1 1.7 years ago
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    Mod sflanker

    Using 1 or 1.0 as the "Input" property makes the input value a fixed number instead of reading the current value of a slider, attribute, or variable. If you used 0.5 the piston would be half extended any time it was activated.

    +2 1.7 years ago
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    102 FLYGUY101

    @sflanker What does the "1.0" do?

    1.7 years ago
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    311 zeropol

    If I understood, you want to use the piston only with action groups. Pressing AG2 one time would extend the piston, pressing a second time retract it, and so on.
    If it is what you want, so do this ( I tested it works ):
    - Select your piston, click "properties", and in "piston input" ( you have "slider 2" ) , click "slider 2" and write Command Pod.FlightProgram.PistonVar
    - Enter vizzy and use this short snippet
    - Now, pressing action group 2 will alternate between extended and retracted.


    edit : Sflanker was faster than me ^_^ ( the solution seems different. His solution looks better because it don't need Vizzy. Do his solution. )

    +1 1.7 years ago
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    Mod sflanker

    You can achieve this by setting the Input property of your piston to the numeric value 1.0, the Activation Group property to your desired AG, and enabling the "Zero On Deactivate" property. All under the Piston Input section of the part properties.


    If you don't see some of these properties you need to do the following: In the part settings for your piston, enable "Show Hidden Properties" in the Tinker Panel, you will then see a number of new options under the Piston Input section.

    +3 1.7 years ago

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