GRAUPNER mx-24s, Programming Manual

Page: 72 / 216

72
Helicopter type
Defi ning the helicopter model type
H E L I T Y P E
Swashplate type 1 Servo
Linearis. swashpl.
no
Rotor direction
Pitch min.
Expo throttle lim.
Thr. limit warning
SEL
left
forwrd
0%
- 70%
In this menu you defi ne the “type” of the model to be
programmed. When you do this, you also automatical-
ly defi ne all the characteristic mixers, coupling func-
tions etc. for the selected model type for subsequent
programming. Select the line with the rotary control
pressed in, and choose the required option by giving
it a brief press:
Swashplate type
Several programs are provided for controlling the
swashplate. Which of these you activate varies accor-
ding to the number of servos which are used to cont-
rol the collective pitch function in your helicopter.
Hold the rotary control pressed in and select the
“Swashplate type” line. After a brief press on the rota-
ry control, select the number of servos in the highligh-
ted fi eld.
The servos must be connected to the receiver outputs
in the sequence described on page 43.
“1 servo”: The swashplate is tilted by one roll
/ pitch-axis servo. Collective pitch is
controlled by one separate servo.
“2 servos”: The swashplate is moved axially by
two roll servos for collective pitch con-
trol; pitch-axis control is de-coupled
by a mechanical compensating rocker
(HEIM mechanics).
“3Sv (2 roll)”: Symmetrical three-point swashplate
linkage using three linkage points ar-
ranged equally at 120°, actuated by
one pitch-axis servo (front or rear) and
two roll servos (left and right). For col-
lective pitch control all three servos
move the swashplate axially.
“3Sv (2p.ax)”: Symmetrical three-point linkage as
above, but rotated through 90°, i. e.
one roll servo on one side, and two
pitch-axis servos front and rear.
“4Sv (90°)”: Four-point swashplate linkage using
two roll and two pitch-axis servos.
Pressing CLEAR resets the swashplate type to
“1 servo”. The swashplate mixer ratios are set in the
»
Helicopter mixers « menu, in the same way as
swashplate rotation.
Note:
If none of the swashplate mixers is correct for your
model, you can adjust one of them to suit your own
swashplate type in the »
Helicopter mixers « menu
under “Swashplate rotation”.
Swashpl. type: 4 servos (90°) 2 pitch-axis / 2 roll
2
5
1
3
Swashplate type: 3 servos (2 Roll)
3
1
2
Swashplate type: 3 servos (2 pitch-axis)
3
2
1
Swashplate type: 2 servos
2
1
Swashplate type: 1 servo
2
72 Program description: Basic settings
Linearis. swashpl.
Entering “yes” prevents unwanted side-effects with
the swashplate linkage, such as collective pitch chan-
ges when a roll-axis command is given, or tension
between the swashplate servo linkages. Such stress
can occur if the servos concerned do not generate
identical travels due to differences in servo travel set-
tings.
The results of the linearisation process require some
familiarisation, because the servo travel is reduced
slightly at small defl ections in order to linearise the ro-
tational travel of the servo arm overall.
Rotor direction
In this line you enter the direction of rotation of the
main rotor:
“left”: viewed from above, the main rotor rotates