Service and maintenance 21
Gobos: general
The MAC Viper Profile uses specially designed borosilicate 3.3 gobos with a heavy matted aluminum
coating that require particularly careful handling and storage. The MAC Viper Profile User Guide available
for download from www.martin.com gives names, illustrations and part numbers of the gobos installed as
standard.
The use of metal gobos in the MAC Viper Profile is not recommended.
Do not use gobos with dark coatings on any side, as these will absorb heat – either directly from the lamp or
reflected back from other gobos and optical components – and will not be durable.
Gobo orientation
The orientations shown in Figure 17 are correct in most cases, but consult your Martin dealer or gobo
supplier if you are in any doubt about the orientation of a specific gobo type.
Coated Glass Gobos
The heavy matted aluminum coated borosilicate gobos in the MAC Viper Profile are
factory-installed with the more reflective sides facing towards the lamp. Replacement
gobos must also be installed with more reflective sides facing the lamp in order to avoid
heat damage.
More reflective side towards lamp
To minimize the risk of gobo overheating
and damage, turn the more reflective side of
a coated gobo towards the lamp.
Less reflective side away from lamp
The less reflective side of a coated gobo will
absorb less heat if it faces away from the
lamp.
Textured Glass Gobos
Textured side towards lamp Smooth side away from lamp
Textured glass gobos in the MAC Viper Profile sit most squarely in the gobo wheel with the
textured side towards the lamp. If in doubt, consult your Martin dealer or gobo supplier.
Image / text Gobos
True image towards lamp Reversed image away from lamp
Figure 17. Correct gobo orientation
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