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Electronic Theatre Controls Inc

Fixture Wobbles at Tilt 0 with Pan Rotation

Symptoms

With Tilt at 0 degrees, rotating the Pan parameter causes the fixture to wobble.

Explanation of Issue

It is likely that the tilt range is incorrect in the fixture profile.

Always ensure that your fixture profile is updated before continuing with troubleshooting. See How to Update Fixture Profiles

Fix

Correcting tilt range

  1. First, find the correct zero degree value for tilt.
    1. Set your tilt to 0°. Pan clockwise 360°, then counterclockwise 360°, and repeat.
    2. Slowly increase or decrease your tilt value until the fixture spins with no wobble in the beam during the sweep.
      Spin_Decreasing.gif
    3. Using About, find the raw DMX values for tilt (including course and fine) and note them.
      Tilt Home DMX.png
    4. Set this new raw DMX level as your Tilt DMX Home value in the Fixture Editor.
  2. Then, using the new DMX Home value, calculate the user minimum and maximums for the Tilt range.
    1. Set your tilt to your new Tilt DMX Home Value.
    2. Begin increasing tilt until the fixture head is approximately perpendicular to its base.
      Tilt_90.gif
    3. Record the Found Tilt DMX value after tilting the fixture 90° from the Tilt DMX Home Value
      Tilt_90_DMX.png
    4. Note the Minimum DMX Value Allowed for Tilt and the Maximum DMX Value Allowed for Tilt
  3. Calculate the User Min and Max Degrees using the following formulas (or by entering the values on the fields in this page and pressing Calculate):
    User Min (deg) for Tilt  
    User Max (deg) for Tilt  
  4. Enter the User Minimum, Maximum and DMX Home Values in the Eos Fixture Editor Tilt Range:
    DMX User Label
    Min Home Max Min Home Max
    Quick Actions... Quick Labels...
            0    
    +  
  5. Test for accuracy.

If you correct inaccuracies in a fixture profile, please report the necessary updates via the ETC Augment3d forums at community.etcconnect.com. When possible, please include a copy of the fixture manual. 

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