User's Manual

165
Programming example: model helicopter
“Basic settings” menu (pages 64 … 71)
mod name
stick mode
rotor direct
swashplate
1
right
1 servo
cut off
–––
+150%–100%
… 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:
mod name
stick mode
rotor direct
swashplate
1
right
1 servo
cut off
–––
+150%–100%
STARLET
In the next four lines we come to the fi rst settings which
are specifi c to helicopters:
In the “Swashplate type” line select the number of
servos which are used to actuate the swashplate. See
page 67 for more details of this.
In the “Rotor direction” line we enter the direction of
rotation of the main rotor as viewed from above. In the
“Collective pitch min.” line set “forward” or “rear” to suit
your personal preference. This setting 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.
stick mode
rotor direct
swashplate
1
right
3sv(2rol)
cut off –100% +150%
1
pitch min
rear
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
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 …
“Swashplate mixer” menu (page 112),
SP – MIXER
ptch
roll
nick
+61%
+61%
+61%
… where you will fi nd that they are pre-set to +61% in
each case. If the swashplate does not respond correctly
to the stick movements, the fi rst step is to change the
mixer directions from “+” to “-” if necessary. The second
recourse is to reverse the servo directions in the “Servo
settings” menu.
Note:
Please note one important difference in later Graupner
mc and mx radio control systems compared with
earlier equipment: the fi rst collective pitch servo and the
throttle servo have been interchanged.
Now move to the …
“Servo settings” menu (page 72),
S1
S2
S3
rev cent
+
trav
0%
0%
0%
100%
100%
100%
100%
100%
100%
0%
0%
100%
100%
100%
100%
S4
S5
… where you can set up the travels and directions of
rotation of the individual servos. 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-