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p. 5
others.
The Rosco DMX Iris is equipped with a unique safety feature, the Friction
Lock. Located on the left side of the DMX Iris is the Lock Slider. Depressing
this plunger will extend a knurled cylinder which presses against the insides
of the accessory iris slot, securely holding the DMX Iris in place. To install the
DMX Iris into your luminaire it is necessary that the Lock Slider be in the UP
position, with the lock disengaged.
Insert the DMX Iris into the iris slot of your luminaire with the motor box
extending towards the front, the lens end, of the light. It may be necessary
to angle the yoke of the luminaire back to allow access into the accessory
iris slot.
Note that on certain luminaires, the sliding cover of the iris slot may
have to be removed to allow the DMX Iris to fit properly.
Make sure that the
DMX Iris is seated all the way down into the luminaire. This is is important to
insure that the light path is not blocked. If you project an oblong or cut off
beam pattern, wiggle and reseat the Iris all the way down.
To engage the Friction Lock, press down on the Lock Slider until it stops.
The unit will be held securely into the accessory iris slot. The Friction Lock
is only intended to prevent accidental movement of the DMX Iris within
the accessory slot. It is highly recommended that you install a safety cable
(Figure 4) to prevent the DMX Iris from falling out of the fixture and possibly
causing harm.
Caution: Make sure to route the power cord and DMX cables to avoid the
extremely hot back end of the luminaire. Failing to do so could result in
melting cords, signal failure or fire!
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Operation and Control
DMX Operation
Changing the level of the assigned DMX channel will cause the iris
mechanism to open or close. You can define how the Rosco DMX Iris
responds to DMX control signals. In Mode 1 and 3, a zero level of dmx sets
the iris aperture to its full open 75mm aperature. Increasing the channel
level or dmx value will close the DMX Iris until it reaches its smallest 10mm
aperture. Switching the unit to Mode 2 or 4 reverses this behavior. As the
level of the DMX channel increases, the aperture will iris up and when the
level reaches 100% the aperture will be at its largest 75mm opening.
Modes 3 and 4 are typically used with control consoles designed for
automated moving lights and allow you to separately control the aperture
size and movement speed on 2 differnt channels.
