GRAUPNER mx-24s, Programming Manual

Page: 92 / 216

92
Program description: Transmitter controls
Channel 1 curve
Control characteristic for the throttle / collective pitch curve
?
m
OU
T
P
U
T
-- +
1
10
0
-60%
-60% Input
Curve
off Point
Output
Channel 1 C U R V E
In most cases the throttle response or the collecti-
ve pitch response is not linear, and in this menu you
can set up a curve to compensate for the non-linea-
rity. The menu also enables you
to change the cont-
rol characteristic of the throttle / collective pitch stick ,
regardless of whether the control function operates a
single servo or multiple servos via various mixers.
If you have specifi ed different fl ight phases in the
»
Phase settings « and the » Phase assignment «
menus (see pages 100, 104), this option can be set
up separately for each fl ight phase. The fl ight pha-
se name is always superimposed at bottom left of the
screen, e. g. “normal”.
The control curve can be defi ned by up to eight
points, in the following section termed “reference
points”, which can be placed at any position along the
stick travel. The on-screen graph considerably simpli-
fi es the process of setting and adjusting the reference
points. Nevertheless, we recommend that you start by
using fewer reference points.
Please note that the curve characteristic you set here
acts as the input signal on particular mixers in the
»
Helicopter mixers « menu; see page 122:
In the basic software set-up three reference points
defi ne a linear “curve” as the base setting, namely the
two end-points at the bottom end of the stick travel “L”
(low = -100% travel) and the top end of the stick tra-
vel “H” (high = +100% travel), together with point “1”,
which is exactly in the centre of the stick travel.
Important note:
It is important that you leave both end-points of the
“Channel 1 curve” at +/-100%, otherwise you may not
be able to exploit the full extent of the curve in the
subsequent curve mixers located in the »
Helicopter
mixers « menu.
First switch to the desired fl ight phase, if necessary.
Setting and erasing reference points
You will fi nd a vertical line in the graph, and you can
shift this between the two end-points “L” and “H” by
moving the relevant transmitter control (throttle / col-
lective pitch stick). The current stick position is also
displayed in numerical form in the “Input” line (-100%
to +100%).
The point at which this line crosses the curve is ter-
med the “Output”, and can be varied at the reference
points within the range -125% to +125%. This cont-
rol signal affects the throttle and collective pitch ser-
vos, and all subsequent mixer and coupling functions.
In the example above the stick is at -60% control tra-
vel and also generates an output signal of -60%, sin-
ce the curve is linear.
Between the two end-points “L” and “H” and the stan-
dard centre point 1 in the middle you can now set a
maximum of four reference points. However, if you
fi rst erase point 1 in the centre of the transmitter cont-
rol travel, you can enter up to six reference points, but
please note that the distance between adjacent refe-
rence points must be no less than about 25%.
Now move the stick, and as soon as the highlighted
question mark
? appears, you can place a reference
point at the corresponding stick position by pres-
sing the rotary control. Up to six further points can be
placed between the extreme points “L” and “H”, but
the order in which you place them is not signifi cant,
as the reference points are automatically re-numbe-
red continuously from left to right in any case.
Example:
«Hover »
Input
Curve
off Point
Output
Channel 1 C U R V E
Note:
In this example the stick is located in the immediate
vicinity of the right reference point “H”. That is why
the “point” value “
+100% ” is highlighted (black back-
ground).
If you wish to erase one of the set reference points 1
to max. 6, move the stick close to the reference point
in question. The reference point number and the as-
sociated reference point value now appear in the
“Point” line. Press the
CLEAR button to erase that
point.
Example – erasing reference point 3:
«Hover »
Input
Curve
off Point
Output
Channel 1 C U R V E
When the point has been erased, the highlighted
question mark
? re-appears after “Point”.
» Helicopter mixers «
Pitch
stick
Collective pitch
C1 Throttle
C1 tail rotor
C1
Curve