GRAUPNER mx-24s, Programming Manual

Page: 90 / 216

90
Program description: Transmitter controls
Channel 1 curve
Control characteristic for throttle / airbrakes
?
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 effect of
the airbrakes or spoilers is not linear, and in this
menu you can set up a curve to compensate for the
non-linearity. The menu enables you
to change the
control characteristic of the throttle / airbrake stick , re-
gardless of whether this control function directly af-
fects the servo connected to control channel 1, or af-
fects multiple servos via various mixers.
If you have specifi ed different fl ight phases in the
»
Phase settings « and » Phase assignment « menus
(see pages 100, 104), this option can be set up se-
parately for each fl ight phase. The fl ight phase 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, termed “reference points” in the following sec-
tion, 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.
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.
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 / air-
brake stick). The current stick position is also dis-
played 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%. The cont-
rol signal generated in this way affects all subsequent
mixer and coupling functions. In the example above
the stick is at -60% control travel and also generates
an output signal of -60%, since 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 pressing
the rotary control.
The order in which you place the (maximum) six
points between the end-points “L” and “H” is not sig-
nifi cant, as the reference points are automatically re-
numbered continuously from left to right in any case.
Example:
«Normal »
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-hand reference point “H”. That is
why the “point” value “
+100% ” is highlighted (black
background).
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:
«Normal »
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”.
«Normal »
?
Input
Curve
off Point
Output
Channel 1 C U R V E
Changing the reference point values
Move the stick to the reference point “L (low), 1 ... 6
or H (high)” which you wish to change. The number
and the current curve value of this point are displayed
on the screen. You can now use the rotary control (or
one of the INC / DEC buttons, if “free”) to change the
momentary curve value in the highlighted fi eld within
the range -125% to +125%,
without affecting the ad-
jacent reference points.