Light fixture including a three-bar frame solver for shutter control

A method for controlling a light fixture, the method comprising:

• determining, using an electronic processor, a desired orientation of a framing shutter blade;
• determining, using the electronic processor, whether the desired orientation is within a gamut of the framing shutter blade;
• determining, using the electronic processor and in response to the desired orientation being outside of the gamut of the framing shutter blade, an adjusted orientation of the framing shutter blade, the adjusted orientation of the framing shutter blade corresponding to an orientation for the framing shutter blade that is as close as possible to the desired orientation;
• and
• controlling, using the electronic processor, a plurality of framing shutter motors to move the framing shutter blade to the adjusted orientation.

A light fixture comprising:

• a housing;
• a light source;
• a framing shutter blade system including:
• a first arm,
• a second arm,
• a framing shutter blade including a first blade slot configured to receive the first arm in a slidable manner and a second blade slot configured to receive the second arm in a slidable manner,
• a first framing shutter motor including a first output shaft, the first framing shutter motor being connected to the first arm via the first output shaft, and
• a second framing shutter motor including a second output shaft, the second framing shutter motor being connected to the second arm via the second output shaft;
• and
• an electronic processor electrically connected to the light source and the framing shutter blade system, the electronic processor configured to:
• receive a desired angle of the framing shutter blade,
• receive a desired thrust of the framing shutter blade,
• determine a desired orientation based on the desired angle and the desired thrust,
• determine whether the desired orientation is within a gamut of the framing shutter blade,
• determine, in response to the desired orientation being outside of the gamut of the framing shutter blade, an adjusted orientation of the framing shutter blade, the adjusted orientation of the framing shutter blade corresponding to an orientation for the framing shutter blade that is as close as possible to the desired orientation, and
• adjust the first arm and the second arm by controlling the first framing shutter motor and the second framing shutter motor to move the framing shutter blade to the adjusted orientation.