VARI❋LITE® - VL1000™ ERS LUMINAIRE SERVICE MANUAL
30 14-May-2009 02.9663.0010 F
Gobo Index Timing Belt Alignment
The index timing belt (54.9663.1220) must be aligned so that the mechanism "clocks"
properly. This belt is installed around the index gear and top gear of the gobo wheel
(refer to Figure 2-11). The wheel position belt (54.2045.0002) is installed around the
wheel position gear and bottom gear of the gobo wheel, and does not require
alignment. Each belt is also routed around one pulley as shown in Figure 2-11.
Note: The alignment procedure is the same for both arc and incandescent versions.
Use the following procedure to re-align the index timing belt in the event it slips or the
gobo wheel is removed from the bulkhead. (This procedure assumes that the wheel has
been removed from the bulkhead assembly. If you are simply re-aligning the belt, Step
2 can be skipped.)
To align index timing belt:
Step 1. At large gear, align one of belt’s clock marks with small groove at inside of
gear. The clock marks will either be two ridges (newer belts) or one ridge and
one red mark (older belts).
Figure 2-10: Aligning Index Gear Groove and Clock Mark
use red mark (older belts)
Index Gear (Larger Gear)
Arc Gobo
Index Timing Belt
Groove
or
ridge (newer belts)
Clock Mark
Bulkhead
Index Timing Belt
red mark will be one-tooth inside ridge,
Ridge
Ridge
use as clock mark (instead of ridge) if present
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