Strong XENON GLADIATOR II Instruction Manual page 12

THE CENTER SECTION of the bulb positioning controls is a threaded member that focuses
the bulb in relation to the reflector. Turning this adjustment moves the bulb in only one plane, into or away from
the reflector. Turning this section clockwise moves the bulb away from the reflector. The small knurled screw
to the left of this section can be tightened to lock the focusing mechanism after the following procedures have
been completed.
THE LARGE THUMB SCREWS, on either side of the focusing control, lock the horizontal
and vertical adjustment mechanism in position.
TURN THE CENTER FOCUSING SECTION of the bulb positioning control counterclock-
wise until a small black spot is projected onto the wall. It may be best to run this adjustment both directions to
permit positive identification of the spot.
LOOSEN THE TWO THUMB SCREWS, one on either side of the center focusing section,
just enough to permit manual movement of the complete assembly. The bulb positioning control will now move
around these two thumb screws, and as this control is shifted, the smooth shadow of the bulb electrode can be
seen extending beyond the projected center hole in the reflector. The shadow of the electrode (black spot) must
be centered in the projected hole of the reflector (shaded, less dense dark area).
MOVE THE CONTROL SECTION around the two screws until the black spot is as round as
possible to project. It may be necessary to again turn the focus control to project a sharply defined black spot.
AFTER THE BLACK SPOT is as even around the outside as possible to project, and appears
centered in the shaded reflector center hole, tighten the two large thumb screws to lock the position of the
mechanism. Turn the center focus control to obtain the brightest light with the best light distribution. Rotate the
lens spot focus control knob, located at the extreme front of the lens mechanism, to obtain the sharpest edge
possible on the projected spot.
THE SECOND METHOD of focusing the xenon bulb is to project the spot to the stage, and
working with the above lamphouse controls, adjust these controls to obtain a "hot spot" on the projected spot.
Then center this "hot spot" on the projected light by moving the entire control section around the two thumb
screws. Once this "hot spot" is centered in the projected light, lock the control in position with the two thumb
screws and turn the center section to obtain a spot with an even distribution of light. Rotate the lens spot focus
control knob to obtain a sharp edge on the projected spot.
XG2/010