Service manual

VARI❋LITE® - VL1000™ ERS LUMINAIRE SERVICE MANUAL

28 23-Oct-02 02.9663.0010 D

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 (54.2045.0001) 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

ridge (newer belts)

Clock Mark

Bulkhead

Index Timing Belt

red mark will be one-tooth inside ridge,

Ridge

use as clock mark (instead of ridge) if present