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Programming example: model helicopter
»base sett.« (pages 50 … 54)
model name
stick mode
rotor direct
swashplate
1
left
1 servo
… menu using the characters which are available in the
“model name” line of the second menu page:
0123456789
model name
?
:
;
ABCDEFGHIJKLMNO
STAR
PQRSTUVWXYZ
Once you have entered the “Model name”
you should
check that the “Stick mode” is correct:
model name
stick mode
rotor direct
swashplate
1
left
1 servo
SEL
STARLET
In the next three lines we come to the fi rst settings which
are specifi c to helicopters:
stick mode
rotor direct
swashplate
1
right
3sv(2roll)
SEL
pitch min front
In the “s
washplate (type)” line select the number of
servos which are used to actuate the swashplate.
In the second line – “Rotor direct(ion)” – we enter the
direction of rotation of the main rotor as viewed from
above. In the “(Collective) pitch min.” line set “front”
or “rear” to suit your personal preference. This set-
ting applies equally to all subsequent mixers, and it is
therefore vital that you do not change it later in order to
alter individual mixer directions, such as the direction of
collective pitch or throttle.
At this point, if you have not already done so, the servos
should be connected to the receiver in the following
sequence:
Roll 2 servo
Gyro gain
Throttle servo (speed controller)
Tail rotor servo (gyro system)
Roll 1 servo
Pitch-axis servo
Free or auxiliary function
Auxiliary function (speed governor)
Receiver power supply
The mixer ratios and mixer directions for the swashplate
servos for collective pitch, roll and pitch-axis are set in
the …
»swashp.mix« menu. (page 93)
SEL
SP – MIXER
ptch
roll
nick
61%
+
61%
+
61%
+
You will fi nd that they are pre-set to +61% in each case.
If the s
washplate does not respond correctly to the stick
movements, the fi rst step is to change the mixer direc-
tions from “+” to “-” if necessary. The second recourse is
to reverse the servo directions in the »servo set.« menu.
Note:
Compared with earlier systems, please note that the fi rst
collective pitch servo and the throttle servo have been
interchanged in later GRAUPNER mc and mx radio
control systems.
Now move to the …
»servo set.« (page 56)
S1
S2
S3
rev cent
+
trav
0%
0%
0%
100%
100%
100%
100%
100%
100%
SEL
SEL SYM
ASY
… menu, where you can set up the travels and direc-
tions of rotation of the individual ser
vos. The basic aim
here should be to keep servo travels at ±100% wherever
possible, as this maintains best possible resolution and
accuracy. Use “rev” if necessary to change the direc-
tion of rotation of any servo; do check carefully that the
direction you set really is correct. The tail rotor servo,
in particular, must operate in such a way that the nose
(!) of the helicopter moves in the same direction as the
movement of the tail rotor stick.
A glance at the …
»contr set.« (page 60)
I8
+
trv
100%
100%
111%
88%
SYM
ctrl7
empty
++
++
++
ASY
lim
gyr
SEL
empty
100%
100%
… menu will show you that transmitter control “7”, i. e.
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