Vari Lite VL3500 Spot Luminaire, Service Manual

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T
ESTING
: A
UTO
R
ECALIBRATION
0 2 . 9 6 7 8 . 0 0 1 8 A 11
2
Auto Recalibration
Most mechanisms with sensors will check their sensor when at a zero position, if the sensor is not
detected within 3 seconds, the mechanism will recalibrate. This applies to all except pan and tilt, and
zoom and edge. Pan and tilt are corrected continuously if required by encoders fitted to the motor
shaft.
Note: Colors (CTO and CYM) will only auto recalibrate when the dimmer has been closed for 3
seconds.
Partial Recalibration
It is possible to recalibrate sections of the luminaire from a console. This allows greater flexibility and
speed by only forcing a recalibration on specific mechanisms. Partial recalibration values (on the
control channel) are as follows:
• Hold DMX value 102 for 3 seconds then 0 recals color: Color wheel, CYM, CTO, Dimmer
• Hold DMX value 114 for 3 seconds then 0 recals gobos: Gobo wheels and Index
• Hold DMX value 128 for 3 seconds then 0 recals lenses: Edge, Zoom, and Shutter
• Hold DMX value 140 for 3 seconds then 0 recals Dimmer and Strobe
Sensor Testing
Most mechanisms within the VL3500 luminaire are equipped with either optical or magnetic sensors.
The VL3500 master control board (MCB) has labeled test points for reading DC voltages at each
sensor. Testing is best performed with a digital voltmeter for sensor readings or an Oscilloscope for
pan/tilt encoder readings. The values can be used to determine whether a circuit is opening correctly or
needs further troubleshooting.
Guidelines:
• The values will change depending on whether the sensor reading is Open or Closed.
• The values will be different depending on the type of sensor: optical or magnetic.
• As a general rule, if a change occurs from 5v to 0v or visa versa, then it is working.
• An Open reading occurs when the sensor is not aligned - tab not at sensor (typically a non-zero
DMX value).
• A Closed reading occurs when the sensor is aligned -tab in or at sensor (typically a zero DMX
value).
• Optical sensors read high when the sensor is Closed.
• Magnetic sensors read Low when the sensor is Closed.
• High value - 5 volts (typically 4.9 volts).