22 MAC Viper Profile Safety and Installation Guide
Gobo handling and storage
1. Store all gobos in a dust-free environment with approx. 50% humidity.
2. Always use clean gloves when handling gobos.
3. Avoid touching the other gobos when taking out a gobo from a rack: the sharp edge of one gobo can
scratch the others.
4. Clean the coated side of gobos with dust and oil-free compressed air only.
5. Clean the uncoated side of gobos with photographic quality lens-cleaner and optics cleaning tissues.
Use a repeated dabbing action rather than a rubbing action.
6. Avoid scratching coated and uncoated sides.
7. Never place a gobo with the coated side face-down on any surface.
8. Mount the gobo with the matted coating facing towards the front of the fixture, away from the lamp.
Replacing rotating gobos
Important! A gobo can fall out of its holder if its spring is inserted the wrong way round.
Do not lubricate gobo bearings: excess grease can cause loss of step.
Correct gobo orientation is critical. Read the guidelines in Figure 17 carefully before installing a
gobo.
The MAC Viper Profile has two rotating gobo wheels: one is supplied with rotating breakup gobos, and one
with rotating air FX gobos. Gobos are interchangeable.
To replace a gobo:
1. Disconnect the fixture from power and allow it to cool for 30 minutes.
2. Remove the head covers, position the head with the front glass angled downwards and the top side
facing upwards, and apply the tilt lock (see “Access to the head” on page 17).
3. Turn the relevant gobo wheel until the gobo you want to replace is accessible from the top of the fixture.
4. See Figure 18. Rotate the goboholder until its magnet A lines up with a reference point that you choose
on the module frame (B for example). Remove and insert any gobos you replace one by one, with the
goboholder magnets lined up with your reference point, and avoid rotating the gobo wheel while a gobo
is removed. This will keep gobos in the orientation they were designed for and avoid the need to
reprogram the controller because a gobo orientation has changed during service.
A
A
B
Figure 18: Goboholder position for replacement
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