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Comments:
•
If a V-tail unit should move incorrectly
either "high/low" or "left/right", please
observe the information in the table on
page 62 in the right column. The same process
applies for the ailerons and flaps.
•
The settings described in the following are based
on a model with "normal" tail unit and "none
(motor)". The settings are adopted for models
with a V-tail with practically no changes at all.
However, the transfer of this information is not so
simple for delta/flying-wing models.
Therefore, a special programming example for this
model type is provided on page 320.
In the menu ...
»Servo adjustment«
Servo 1
0%
100%
100%
Servo 2
0%
100%
100%
Servo 3
0%
100%
100%
Servo 4
0%
100%
100%
Servo 5
0%
100%
100%
Rev cent.
– travel +
... servos can now be adapted for appropriate "direc-
tion of rotation", "neutral position", "travel" and
"limitation" to the requirements of the model.
In this sense, all settings which serve to compensate
servos and make minor adaptations to the model are
"necessary".
Notes:
•
The maximum possible throw of a
Graupner servo is 150 % per side, based
on both mechanical and electrical
reasons. For example, if the sum of the values of
the column "Centre" and one of both columns of
"Servo travel" exceed this limit, the respective
servo can no longer follow the control commands
starting from this point. Therefore, please bear in
mind that mixers and settings in the »Dual Rate
/ EXPO« menu also have an influence on servo
travel.
•
The settings options provided in this menu
for asymmetric servo travel do NOT serve for
achieving differentiations for ailerons and/or flaps.
There are options better suited for this purpose in
the »Wing mixers« menu.
In the last column, "- limit +", the basic settings of
(page 112)
150 % can, and perhaps should be, significantly
150% 150%
reduced.
150% 150%
The values entered in this position act as a "limiter",
whereby the setting is actually for which point of travel
150% 150%
the respective servo may not exceed, so that it does
150% 150%
not start up mechanically and thus unnecessarily
150% 150%
draw current. In this case it is the end of available
– limit +
mechanical play on the servo, rudder and/or steering
which is decisive for the value to be set.
An example of this would be the selection of
a model with cruciform tail, with which the
rudder moves in a wedge-shaped cutout of
the elevator. In order to prevent the rudder on the
elevator starting up and possibly blocking it, the travel
is normally mechanically adjusted (at the linkage) so
that the rudder does not start with the full throw of the
stick. As long as the rudder is only controlled with the
corresponding stick, there will not be any further
problems with this. But at the moment, when in addi-
tion to the normal rudder signal a mixer also influ-
ences the rudder, such as an "aileron 2 4 rudder"
mixer (aileron to rudder), it is possible that the two
signals can sum to an excessive extent.
A correctly set limit of travel intercedes precisely at
this point and thus reliably prevents the mechani-
cal starting of the rudder. The limit of travel should,
however, not be too small, so that the rudder throw is
permanently and excessively limited.
Of course, the travel on both sides could, of course,
also be reduced to the that a start-up would not even
occur with an addition of the maximum values. With
this method, however, the prevention of an actually
occurring event would result in a permanent reduction
of the normal rudder throw.
The menu ...
Programming examples - Winged models
293
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