Otating Gobo Wheel Mechanical Index ); Ixed Gobo Wheel Magnetic Index ); Olor Wheels Magnetic Index ) - Martin MAC 500 Service Manual

5. Center the effect in the light path. Begin by visually centering the effect with the lamp off. Then strike the lamp
and focus the beam on a flat surface to confirm proper alignment. Adjust if necessary and then tighten both set
screws.
6. Once the wheel is optically aligned, rotate the effect until the magnet is under the sensor. This can be done by
selecting the wheel from the MAN or ADj menu and setting it to the open position.
7. To adjust the Hall sensor, position the IC directly over the magnet at a distance of 1 - 1.5 mm and keep it parallel
with the circuit board. Its position can be adjusted by moving or bending the PCB mounting bracket but not by
bending the leads of the IC itself.
3 . 2 R
O T A T I N G
1. With the module installed and the power off, check that the wheel turns freely. If the wheel does not turn freely,
move it in or out until in does.
2. Loosen both set screws on the adaptor. Tighten one set screw slightly to hold the position along the shaft. The
set screws must be loose enough to allow the wheel to turn along the motor shaft.
3. Apply power and reset the fixture. From the control panel, select MAN>RGOB. With the gobo wheel in the open
position and the lamp off, look into the front lens and manually center the wheel in the optical path. Partially
tighten the set screw.
4. If the set screw is not accessible with the wheel in the open position, use the up and down arrow keys to select
a gobo position where you can access a set screw. Center the gobo in the optical path and then partially tighten
the set screw.
5. Turn on the lamp and focus a gobo to check alignment. Move the wheel back and forth a little by hand to see if
the gobo is centered. When the wheel is aligned, fully tighten both set screws.
3 . 3 F -
I X E D G O B O W H E E L
1. With power off, check that the wheel turns freely 360°.
2. Loosen both set screws. If the wheel does not turn freely, move it in or out until in does. Tighten one set screw
slightly to hold the position along the shaft.
3. Reset the fixture. The fixed gobo wheel may not reset if the wheel is too far out of alignment; the procedure will
time-out and a fixed gobo error will occur. If this happens, loosen the set screw and adjust the wheel from this
motor position.
4. From the control panel, select MAN/FGOB. With the gobo wheel in the open position and the lamp off, look into
the front lens and manually center the wheel in the optical path. The set screws must be loose enough to allow
the wheel to turn along the motor shaft. If the motor does turn a step, it must be returned to the reset position.
Repeat the reset procedure if necessary.
5. Tighten the set screw when the open gobo is centered. If the set screw is not accessible with the wheel in the
open position, use the up and down arrow keys to turn the gobo wheel to a point where you can access and
tighten a set screw. Center the gobo in the optical path and tighten the set screw.
6. Turn on the lamp and visually check alignment. Move the wheel back and forth a little by hand to see if the gobo
is centered. Adjust if necessary. When the wheel is aligned, tighten the second set screw.
7. To adjust the sensor, rotate the gobo wheel to the open position. Position the sensor directly over the magnet at
a distance of 1 - 1.5 mm. The sensor can be moved by carefully moving the IC itself.
3 . 4 C
O L O R W H E E L S
1. With power off, check that the color wheels turn freely 360°. Adjust the position along the motor shaft if neces-
sary.
2. Loosen the set screws. Tighten one screw on each wheel slightly to fix the position along the shaft.
3. Reset the fixture and strike the lamp. Select MAN>COL2 from the control menu. Use the arrow keys to turn color
wheel 2 to a point where you can access a set screw.
4. Center the color filter in the light path. The color must be even across the field and there should be no shadows
at the edges.
5. Tighten the set screw. Return the color wheel to the open position.
1998-08-03
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G O B O W H E E L
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M A G N E T I C I N D EX
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M A G N E T I C I N D E X
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M E C H A N I C A L I N D E X
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Adjustment
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