GRAUPNER MC-22S, Programming Manual

Page: 84 / 180

84
What is a mixer?
The basic function
Wing mixers
Program description: Mixers
In many models it is often desirable to use a mixer to
couple various control systems, e.g. to link the aile-
rons and rudder, or to inter-connect two servos where
two control surfaces are actuated by separate servos.
In all these cases the signal at the “output” of the con-
trol function at the transmitter stick – i.e. at the control
function input (see sketch) – is “bled off”, and the de-
rived signal is then allowed to affect the “input” of ano-
ther control channel in a defi ned manner, so that it af-
fects a particular receiver output.
Example: controlling two elevator servos from the
elevator stick
The software of the mc-22s transmitter contains a lar-
ge number of pre-programmed coupling functions as
standard, which are designed to mix together two (or
more) control channels. The mixer required in this ex-
ample is supplied “ready-made”, and just has to be
activated in the software by accessing the »
Model
type « menu.
The software also includes four freely programmable
linear mixers, two curve mixers and two dual mixers
(see below) in each of the fi xed-wing and helicop-
ter programs, all of which can be used in each model
memory.
For more information, please refer to the general no-
tes on »
Free mixers « in this manual, in the section
starting on page 102.
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Transmitter
control
Control function
input
Control channel
(receiver output)
Mixer
menus
Mixer
Servo 1
Servo 2
(Display varies according to model type selected in the » Model
type « menu)
The mc-22s program contains a series of pre-pro-
grammed coupling functions, and all you have to do is
set the mixer ratios and (optionally) assign a switch to
the selected mixer.
The number of pre-programmed mixer functions in
the mixer list will vary according to the “model type”
you have already selected (tail type and number of
wing servos – see page 52). Moreover, all mixer func-
tions can be programmed separately for any different
fl ight phases you have set.
If you have set up multiple fl ight phases in the » Pha-
se setting ” and » Phase assignment « menus, the
name of the current fl ight phase will be displayed at
the bottom of the screen, e.g. «Normal».
The screen shot above lists the (maximum) possib-
le mixer functions. For example, if your model is not
equipped with camber-changing fl ap servos, and you
have not entered any fl ap servos in the »
Model type «
menu, all the fl ap mixers are automatically excluded
from the program. This makes the menu clearer and
easier to understand, and also helps to avoid pro-
gramming errors.
Notes:
• The transmitter control for the airbrake mixers can
be re-programmed in the » Model type « menu from
channel 1 to channel 8 or 9.
• The position of the camber-changing fl aps in the
individual fl ight phases is defi ned primarily by the
Offset value you have set in the »
Control ad-
just « menu; see right column on page 135. Ho-
wever, if you wish to be able to vary the fl ap set-
tings in fl ight, or generally prefer manual fl ap con-
trol, any transmitter control assigned to “input 6”
can be used; see »
Control adjust «, page 58. For
example, this might be one of the two sliders fi tted
as standard. This control operates the two fl ap ser-
vos connected to receiver output 6, or outputs 6
and 7, assuming that you have entered “... 1/2 FL”
in the “Ailerons / fl aps” line of the »
Model type «
menu. However, we recommend that you reduce
the transmitter control travel to 25% or even less,
as this ensures that you have fi ne control of the
fl aps using the slider.
• Any transmitter control assigned to input 7 is de-
coupled by the software if your model has two fl ap
servos; this is intended to avoid malfunctions and
programming errors.
• The fl ap function of the ailerons can be adjusted
either in the » Control adjust « menu (see page
58), by programming input 5 in a similar way to in-
put 6, or alternatively by programming the wing mi-
xer Flap 6
5 aileron.
• If you wish to set up a “Butterfl y” (Crow) braking
system, i.e. raised ailerons and lowered fl aps, this
is carried out independently of the procedures
mentioned above; instead appropriate values are
set in the wing mixers Brake
5 Aileron and (if re-
quired) Brake 6 fl ap.
• If your model features a multi-fl ap wing and a
“Crow” or “Butterfl y” braking system (see below),
but without separate airbrakes, input 1 is not re-
A i l e r o n d i f f e r e n c e + 0 %
F l a p d i f f e r e n c e + 0 %
A i l e r o n s 2 > 4 R u d d e r + 0 %
A i l e r o n s 2 > 7 F l a p s + 0 %
B r a k e > 3 E l e v a t o r + 0 %
B r a k e > 6 F l a p s + 0 %
B r a k e > 5 A i l e r o n s + 0 %
E l e v a t o r 3 > 6 F l a p s + 0 % + 0 %
E l e v a t o r 3 > 5 A i l e r o n + 0 % + 0 %
F l a p s 6 > 3 E l e v a t o r + 0 % + 0 %
F l a p s 6 > 5 A i l e r o n s + 0 % + 0 %
R e d u c t i o n o f d i f f . + 0 %
S Y M A S Y
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