Martin RoboScan 812 User Manual page 12

A d j u s t i n g t h e L a m p
The RoboScan 812 comes fully adjusted from the factory, however, readjustment of the
lamp may improve performance. The lamp is adjusted by turning the 3 screws (11) on the
lamp access plate (12). Turning these clockwise pulls the lamp back towards the rear and
vice versa. Keep adjustments small to avoid pulling the lamp so far off center that it hits the
reflector.
1. Set up the RoboScan 812 so that you can access the lamp-access plate (12)
and, if adjusting the lamp without a controller, the DIP-switch (3).
2. With controller: Turn on the RoboScan 812 and allow the lamp to warm
up for 5 minutes. From the controller, select white light with the open
gobo and position the beam on a flat, white surface. Focus the beam.
Without controller: Flip DIP-switch pins 1, 5 and 10 on. Flip all other
pins off. Apply power to the RoboScan 812. After it has reset, the fixture
produces a white light with an open gobo for adjustment purposes. Wait
approximately 5 minutes for the lamp to reach full brightness. Position
the fixture and/or mirror so the light shines on a flat, white surface and
focus the beam.
3. If there is an off-center "hot spot," the lamp is not centered in the reflec-
tor. Pull the hot spot into the center of the field with small adjustments of
one or more of the screws (11). Note: the Martin Metal Halide lamp is
nearly as large as the reflector opening - very little side to side adjust-
ment is possible or necessary.
4. If the light is significantly brighter in the center of the field than it is at the
edge, the lamp is too far forward in the reflector. Pull the lamp in by turn-
ing all three screws clockwise 1/4-turn at a time until the light is evenly
distributed.
5. If the light is brighter around the edge than it is in the center, or if light
output is low, the lamp is too far back in the reflector. "Push" the lamp out
by turning the screws counterclockwise 1/4-turn at a time until the light is
bright and evenly distributed.
6. If you have made large sideways adjustments, disconnect the fixture from
AC power, allow it to cool, and remove the lamp assembly to ensure that
the lamp is still placed squarely in the socket.
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