Service manual

Technical Description
www.adblighting.com Service Manual - page 29
Issue 0.9
6.3.5 Principe of operation by WARP/M
The importance by WARP/M is accuracy and good repeatability on Pan / Tilt.
WARP/M uses 2 magneto-resistance sensors for each motor. The gear box ratio between the 2
magneto resistance sensors gives an accurate measurement.
The magneto-resistance sensors generate two 90° phase-shifted sinusoidal signals:
A = VS (Oa+S sin (2θ))
B = VS (Ob+S cos (2θ))
Oa Offset voltage of the A bridge
Ob Offset voltage of the B bridge
S Conversion ratio of the sensor
VS Bridge voltage supply and gain
θ Angle of magnetic field
6.3.6 Explanation of Pan by WARP/M
The gear box ratio used by WARP/M is 1/10 for the pan motor, 5 motor turns are required to cover
the entire span. This means 10 electrical revolutions for the first magneto-resistance sensors, and 1
electrical revolution (1/2 mechanical turn) for the second magneto-resistance sensor.
6.3.7 Magnetic sensors connector
The sensor connector is a MOLEX mini-KK series 1 x 5 male connector, with the following wiring:
1 2 3 4 5
+V analog (3.3V) Sense1 Sense2 GND GND