ROBBE 8068 Notice D'utilisation page 12

gramming of two mixers in the transmitter,
so with greater roll- and nick- commands
the sense gets reduced to 0% (!!!Attention,
not negative values allowed! At under -75%
you get a new horizon calibration! This two
mixers are not obligate, but recommended.
3. if the sense cable is not connected, the
sense will be read from the on board trim-
mer.
4. Like well known from the Gyros, if the sense
is set too high you can get an over-reaction
of the stabilisation. In that case just reduce
slightly the sense.
100%
0%
-75%
- 100%
6. CALIBRATION AND FLYING
A horizon calibration is necessary before
the first flight. For the next flights you do not
have to calibrate, you can fly with the old
calibration. A new calibration at the begin-
ning of each day you are flying on is recom-
mended.
6.1. Pre-Flight Check
1. Test before every flight with sense set to
0%, if your commands to the swashplate
are right.
2. Set the sense to the position you want to fly
with (min 25%) and check with your hand, if
the corrections of the Stabilizer are right. If
the Stabiliser reactions are correct, the
swashplate will tilt only to the front of the
helicopter, when you hold your hand behind
the 2 rear sensors or cover them with 2 fin-
gers (Pic.2). If you cover the front 2 sensors,
the swashpalte must tilt to only the tail of
the helicopter. Covering the 2 left sensors
or holding your warm hand in front of them
will cause a tilt of the swashplate only to the
right (Pic.3). If you cover the right 2 sensors,
the swashplate will tilt only to the left. Gene-
Operating Instructions
Stabilizer
Sense
Horizon-
calibration
12
rally, if you hold the helicopter in the air
above your head and tilt it, the swashplate
must always try to stay horizontally. No
pitch-corrections should occur, the Stabili-
ser makes only nick- and roll-corrections.
Only in case that works you may fly!!!
6.2 Horizon calibration on the ground, especi-
ally for beginners
1. The helicopter must be horizontally on the
ground, houses, trees and cars must be at
least 10m away from the helicopter.
2. Switch the transmitter on.
3. Switch the receiver on.
4. The red LED must blink in single pulsed
mode.
5. Push shortly the button on the sensor unit
and release it.
6. The red LED will blink 10 sec. In this time
you have to go away from the helicopter to
min. 5m and stay exactly behind it or
exactly in front of it. In this way you are
staying between the sight fields of the sen-
sors and allow a precise calibration.
7. Right after the last LED blinking the system
calibrates. The values get permanently
saved in the memory and the LED lights
permanently.
8. The Stabilizer is ready for use, you can
make the Pre-Flight-Check and can fly.
Another possibility to calibrate is, instead of
doing the points 5,6 and 7, just to go away
from the helicopter and set the sense chan-
nel to -100% shortly – that's it. The horizon
calibration happens only once in the
moment when the Sense has reached -
100%. To make a new horizon calibration
you need to set the sense to 0% back and
than again to -100%. If on your landing field
you have an asphalt – beton – grass – snow
ground, it is better to calibrate over the col-
dest surface (above is the gradiation from
warm to cold).
Tip:
In normal hover position the helicopter is
(mostly) slightly inclined, because the rear
rotor is mostly not in the plane of the main
rotor. To calibrate on the ground under the
same angle you hover, you can do the follo-
wing:
Order No.8068