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THE OPTICAL SYSTEM of the TrussTrouper consists of a spot size selector, an iris
assembly to reduce the size of the spot aperture, and a fade-out chopper assembly to permit reducing
light output from full intensity to complete douse. The iris and chopper controls are mounted on the
back of the lamphouse and are fully accessible from either side of the unit. The spot size is selected
by setting and locking a control knob located on the right side (as viewed from rear) of the unit.
INSTALL A LENS MECHANISM compatible with the desired throw. The three lens
mechanisms are designated as Short, Medium, and Long Throw. The throw specifications listed below
may serve as a guideline when first setting up the TrussTrouper, but optimal performance at a given
throw distance may vary with ambient light levels, projection angles, and other variables unique to
the venue.
IGNITE THE LAMPHOUSE and allow the bulb to stabilize. Open the iris to project
the largest aperture by rotating the iris control (left) fully counterclockwise. Open the chopper blades
by rotating the chopper control (right) fully clockwise. Rotate the spot size control knob (right side)
counterclockwise to unlock, and slide the knob forward or back to set the desired spot size. Lock the
spot size control at the desired point.
Iris Control
Fade-Out
Control
Spot Size
Control
Friction
Brake
OPERATION OF OPTICAL SYSTEM
Short Throw
Medium Throw
Long Throw
spot, rotate the iris control clockwise to the desired spot size. The
spot cannot be doused by means of the iris control; do not force
Color
the control beyond its stop. Use the fade-out chopper blades to
Arms
douse (black out) the spot.
decrease the light output, and dim the spot to complete douse-out.
It is adviseable to use the dousing capability of this control to
cut off the light between cues instead of extinguishing the bulb.
The HMI bulb requires a relatively long warmup period, and
repeated ignitions decrease bulb life.
20 - 50 feet (6.0 - 15.2 m)
40-100 feet (12.2 - 30.5 m)
50-130 feet (15.2 - 39.6 m)
TO REDUCE SPOT SIZE, or to project a "head"
ROTATING THE FADE-OUT CONTROL will
TT/04
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