Fixture Fanning

The Fan tools provide a powerful means to manipulate a group of fixtures by spreading their attribute values over a range. To bring up the fan tools, select some fixtures, toggle the "CV" button above the attribute group LCD buttons and then press the attribute group LCD button labeled “Fan”. The Channel Visualizer will now look something like the screen shot below.


The encoders/belts of the console will be mapped as follows:

Near the bottom of the screen are 4 labels that identify the function of the track belts.

Option Description
First This label corresponds to the left point (as indicated by the small red dot in the fan display) and controls the position of the first fixture selected in the fan.
Center Center designates the center point of the fan. (Only available with 3 point fanning)
Last Last is the right red point on the fan display and controls the position of the last fixture selected in the fan
Offset Offset is used to control how far toward “First” or “Last” the center point is considered to be. (Only available with 3 point fanning)

Each of these settings can be adjusted between -100% and + 100%. In the display above they are all shown at zero percent as indicated in the box below each label.

Note that the attribute that will be affected by the fan position control elements is pan (“Fan on Pan”). This is determined by first selecting the attribute type “Pan Tilt” and then pressing the hard button in the column labeled “Pan”. Note that the active attribute hard button has a blue LED. That LED will be lit on the active attribute. To change to a different attribute, such as tilt, press the hard button above the tilt track belt.

Above this are 4 soft button toggles. Pressing or clicking on them will cause them to change from one type of effect on the fan to another. The default soft buttons and their alternate are both shown below:

  Default   Alternate  
Mirror - When Mirror is selected, the first and right points will mirror each other. For example, if the first point is used to pan left, the last point will automatically move right and equal, but opposite amount. Separate - When selected, Separate allows the first and last points to move independently. That is to say, if the first point is used to pan left, that first fixture and all other fixtures except for the last will move left proportionately to one another.  
2-Point - When active, 2-Point allows for the manipulation of first and last fixtures to determine the fan and the center point is used to determine the fan’s overall position 3-Point - When 3-Point is visible, the first and last points are left unaffected by changes to the center point. Instead, an arc is formed.  
Curve - Curve will cause the fixtures in the fan to follow a curvilinear path. The degree of the curve is determined by the center point when in 3-Point mode Linear - Similar to curve, except that instead of a curved path, a linear one is followed.  
Clear - Pressing this button will clear all fan effects. Clear - Pressing this button will clear all fan effects.  

Examples of Fixture Fanning

The Mac 101 Group of fixtures will be used for this example. Build a crowd blinder position preset and a center stage preset as shown below to use as starting points.

Mirror vs Separate Fan

Starting at the “Center Stage” preset, with “Fan on Pan” in 3-Point linear mode the following shows the difference between Mirror and Separate modes when moving only the First fan attribute track belt.

As you can see, in the Mirror example, the First and Last attributes are at +/-13% even though only the First fan attribute was adjusted. This is because as the First fan attribute was altered to -13%, the Last fan attribute mirrored it and moved to +13%%. In the Separate example the First fan attribute is at -13%% but the Last fan attribute has remained at 0%.

2-Point vs 3-Point Fan

Starting at the “blinder” preset, with “Fan on Tilt” in sperate and linear mode the following shows the difference between 2-Point and 3-Point modes.

In the 2-Point example, moving the Center fan attribute only to +6% resulted in both the First and Last fan attributes also moving to +6%. In other words, it acted much like the traditional tilt attribute. In the 3-Point example, moving the Center attribute to -16% left the First and Last attributes unchanged (0%) and distributed a percentage of change to all fixtures between the first and last fixtures selected.

Curve vs Linear Fan

Select the Mac 101s and tilt them forward to 68%, with “Fan on Tilt” in mirror and 3-Point modes, the following shows the difference between Linear and Curve options within the Fan window.

Moving only the Center fan attribute to +12% in Curve mode results, as you can see in a rounded shape whereas moving the Center pan attribute the same amount in Linear mode provides for a straight sided distribution of the beams.

Other Fan Typs

The examples above have used the pan and tilt attributes to demonstrate the fanning functions. However, it should be noted that any attribute can take advantage of the fanning function.

In the above example, the linear 3-point fan is used on the tilt attribute. The color is achieved by bringing magenta to full and, with cyan at 0%, using a mirrored 3-point linear fan with the Center fan attribute at +100%.