Vari Lite VL3500 Spot Luminaire, Service Manual

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M
AINTENANCE
P
ROCEDURES
: G
OBO
T
IMING
A
DJUSTMENTS
0 2 . 9 6 7 8 . 0 0 1 8 A 35
2
Gobo Timing Adjustments
The index timing belt must be aligned so that the mechanism "clocks" properly. This belt is installed
around the index gear (top gear) of the gobo wheel. The wheel position belt is installed around the
wheel position gear (bottom gear) of the gobo wheel, and does not require alignment. Each belt is also
routed around one motor pulley.
For the following steps, refer to Figure 2-19 .
To time gobo wheels:
Step 1. Align all holes in wheels as shown below.
Step 2. Insert a 3" long #4 or M3 screw (or 0.125" diameter pin) completely through aligned holes
in wheel and bulkhead plates as shown. This will lock the wheels in the "open" position.
Step 3. To time Gobo Wheel 1, first align outside planet gear timing mark with notch in wheel.
Loosen index belt just enough to slip teeth and rotate index pulley to center slot in optical
sensor. Reset tension on belt and verify that pulley slot is still centered in sensor and sensor
is centered between two guide marks on pulley flange.
Figure 2-19: Gobo Wheel 1 Timing Adjustments
Align
Insert screw or pin here