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    Jeff Toussieng
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ION flipping fixtures

Something I know i am doing wrong.  I have some movers hanging on the FOH.  I tilt them first to a horizontal position then pan them to the stage.  When I do the next tilt facing forward toward the stage I want the encoder to bring them down while rotating counter clockwise and up when rotating clockwise.  They do the opposite, therefore I flipped the Tilt and it fixed the problem.

When I pan i want the encoder to rotate clockwise for them to pan right and counter clockwise for them to pan left.  They are backwards.  I do a pan flip.  They flip but it does not fix the problem and instead flips the tilt again.  I can't seem to find a way to reverse the pan.  They consistantly move right with a counter clockwise encoder movement and left with a clockwise movement.

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  • I think you're not used to moving yoke/moving head fixtures.

    I would recommend putting one of these moving head fixtures next to you, put a sticker on the 'top' of the head and on one side of the yoke so you can see how it moves.

    Put another sticker on the wall and try to see how many ways you can point that fixture at that sticker.

    With a moving yoke type of fixture there are (almost always) at least two ways to point it at a given location on stage - one using a positive tilt angle and another with a negative tilt angle.
    - For many positions there are more than two, eg there are usually 65,536 ways to point the fixture directly away from its base! (0° Tilt)

    The "Flip" command says "Use another way to point in this direction". You are flipping the entire head around the other way.

    If you point one fixture at the wall using a positive tilt angle and another at the wall using a negative tilt angle, increasing the tilt of both will make one of them move up the wall while the other moves down!

    Another way to think of it is that for half the values of Pan the fixture head is actually upside down.



    [edited by: Richard at 5:04 AM (GMT -6) on Thu, Oct 13 2011]
  • in reply to Richard

    hi richard

    i agree, that your theory certainly works for flipping tilt. i usually don't do that. but flipping pan certainly makes sense to me. and whatever angle the head is tilted to, the pan direction shouldn't be influenced... so, if the pan flipping doesn't work, i would consider that quite unpleasant...

     

  • in reply to ueliriegg

    ueliriegg, you've misunderstood what Flip does.

    Flip is a fixture thing. It flips the entire fixture around to use different Pan/Tilt combinations where the fixture still points in the same overall direction.

    Perhaps an example:

    • Point at something.
    • Now turn around and face in the other direction while still pointing in the same direction.
    • Both your shoulder (tilt) and your feet (pan) have changed values!

    That's what flip does.

    - It's a bit more complicated on fixtures that have more than 360 degrees of Pan because there are often more than two Pan values that can give the same overall direction.



    [edited by: Richard at 5:00 AM (GMT -6) on Thu, Oct 13 2011]
  • in reply to Richard

    ah, richard, sorry, my bad... rtfm...

  • in reply to ueliriegg

    No matter, I think you were probably thinking of the "Invert Tilt", "Invert Pan" and "Swap Pan/Tilt" options.

    Those select whether turning the encoder clockwise should give clockwise or anticlockwise movement, and whether the encoders should be totally swapped over.

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