User manual

189Program description - Helicopter mixer
Pitch (Pitch curve (C1  Pitch))
If necessary, use the  selection keys of the left or
right four-way button to move to the “Pitch” line then
tap briefly on the center SET key of the right four-way
button:
Input
Output
Point
?
0%
0%
0%
Pitch
normal
Curve
off
Unlike the »Channel 1 curve« menu, this display is
only associated with the control curve of pitch ser-
vos, whereas the “Channel 1 curve” affects all servos
controlled by the throttle/pitch stick.
Note that the output signal of the “Channel 1
curve” option thus functions as an input signal
for the collective pitch curve programmed here:
In the graph, the vertical line is synchronized with
the throttle/collective pitch stick and therefore fol-
lows the current Channel 1 curve characteristic.
The control curve can be defined (separately per
flight phase) by up to 6 points, termed “reference
points”, placed at any point along the stick travel.
Initially, however, fewer reference points are adequate
for setting up the collective pitch curve. We recom-
mend beginning with three reference points to start
with. These three points, namely the two end-points
“Pitch low (L)” (= -100 % control travel) and “Pitch
high (H)” (= +100 % control travel) plus a point at the
center of control travel still to be set, define an initially
linear profile for the pitch curve.
Programming details
First, switch to your chosen flight phase, e. g. «Nor-
mal».
The throttle/collective pitch stick is used to move the
vertical line in the graph between the two end-points
“Point L” (minimum pitch at -100 %) and “Point H”
(maximum pitch at +100 % control travel): at the same
time, the current stick position is shown numerically
on the “Input” line (-100 % to +100 %).
The point at which the vertical line crosses the curve
is termed the “Output”, and can be varied at the maxi-
mum of 6 reference points within the range -125 % to
+125 %. A control signal modified in this way affects
only the collective pitch servos.
In the example to the left, the stick is at exactly 0 % of
control travel and also generates an output signal of
0 %, since the characteristic curve is linear.
Up to six additional reference points can be set be-
tween the two end-points “L” and “H”, although the
distance between neighboring reference points must
not be less than approx. 25 %.
Setting reference points
If necessary, use the left or right-hand arrow button 
to move the marker frame down to the “Point” line:
Input
Output
Point
?
0%
0%
0%
Pitch
normal
Curve
off
Move the stick. If the display shows a framed question
mark, then you can set the next reference point with a
tap on the center SET key of the right four-way but-
ton. Simultaneously, the “?” is replaced by a number
and the value field to the right of the reference point
number is highlighted:
1
0%
0%
Pitch
normal
0%
Input
Output
Point
Curve
off
The order in which up to four reference points are
generated between the end-points “L” and “H” is ir-
relevant since these reference points are continuously
renumbered automatically from left to right as they
are entered.
Configuring reference points
To configure a point, use the stick to move the vertical
line onto the point you wish to change. The number
and current curve value of this point are displayed on
the left side of the display, on the “Point” line. Briefly
tap the center SET key of the right four-way button.
Use the selection keys on the right four-way button
to change the current curve value shown in the high-
lighted field. The possible range is -125 % to +125 %
and changes do not affect neighboring reference
points.
+75%
+75%
1
0%
Pitch
normal
Input
Output
Point
Curve
off
In this sample screen image, reference point “1” has
been set to +75 %.
If you wish, however, other points can also be set. At
-50 %, for example …