GRAUPNER mx-20 Hott, Programming Manual

Page: 164 / 296

164 Detail program description - Control adjust
Helicopter mixers
Flight phase-specifi c setting of collective pitch, throttle and tail rotor
On this menu …
Free mixers
MIX active/phase
Fl. phase timers
Helicopter mixer
MIX-only channel
Dual mixer
… all of the fl ight phase-specifi c helicopter mixers are
described, with the exception of the mixers for auto-
rotation fl ight (discussed from page 178 onwards.)
These mixers are used for the basic set-up of a model
helicopter.
For fl ight phase programming, see the menus:
" • Base setup model ", page 74
" • Phase settings ", page 132
" • Phase assignment ", page 134
When you actuate a switch for a specifi c fl ight phase,
then the associated fl ight phase, e. g. "Normal", is
displayed at the lower left edge of the display screen:
C1
C1
Pitch
Throttle
Tail
Tail 0%
Roll 0%
Throttle
Roll
Throttle
Tail
Nick
Nick Throttle
Tail
Swash rotation
Swash limiter
0%
0%
0%
0°
OFF
Nor mal
Gyro suppress 0%
In each of these fl ight phases – with the exception of
the auto-rotation phase – the typical helicopter mixing
and coupling functions shown in the screen-shot
above are available for setting up the model helicopter.
These functions are described in the fi rst part of this
comprehensive chapter.
General information on mixers,
(see also pages 145 and 180)
An arrow "

" indicates a mixer. A mixer "branches off"
the signal fl ow of a control function at a particular point,
in order to use this fl ow to cause a predetermined effect
on a further control channel and, ultimately, the receiver
output. The "Nick

Tail" mixer, for example, means
that the tail rotor servo will be confi gured to follow
commands from the pitch-axis joystick.
Basic programming procedure:
Select the mixer by using the arrow keys on the left 1.
or right touch pad.
Depending on the mixer, the lower line of the display
will show
SEL or the " " icon, which indicates that
you need to move to a second page.
The linear mixer ratios can be set directly by briefl y
2.
tapping the center SET key on the right touch pad:
Use the arrow keys to confi gure the mixer ratio.
Otherwise you will need to switch to the second
screen page where you can set up the appropriate
curve mixer.
If you tap the

or

keys on the right touch
pad ( CLEAR ) at the same time, this will reset values
changed in the active (highlighted) fi eld back to 0%.
Complete the confi guration by tapping the center
3.
SET key on the right touch pad again.
You can page back by tapping the center 4. ESC key on
the left touch pad.
Description of helicopter mixers
To confi gure collective pitch curve settings and the two
mixers "Channel 1

Throttle" and "Channel 1

Tail
rotor", curve mixers are available in all fl ight phases.
Accordingly, these mixers also permit the programming
of non-linear mixing ratios along the path of joystick
travel, if required. Switch to the display screen for curve
settings by briefl y tapping the center
SET key on the
right touch pad – see discussion below.
The curve is set up basically in the same way as the
Channel 1 curve for helicopters, but we will describe
it again here in detail using pitch confi guration as an
example, to save you having to leaf through the manual.
In the remaining lines, fi rst activate the value fi eld and
then use the arrow keys on the left or right touch pad to
set a mixer value in the value fi eld (now highlighted).
The settings available are rounded off with the "swash
limiter" option: These option can be confi gured to
limit the maximum defl ection of the swashplate servo.
Together, these settings confi gure the basic set-up of
the helicopter model.
In the "Autorotation" fl ight phase as described on page
178, however, the mixers "C1

Throttle" and "C1

Tail" are not needed and therefore switched to a
confi gurable default value.
If you want to reset any changed parameters to
their default values, you can do so at any time by
simultaneously tapping the

or

keys on the
right touch pad ( CLEAR ).
Collective pitch (Collective pitch curve (C1

Pitch))
If necessary, use the arrow keys

on the left or right
touch pad to move to the "Pitch" line. Now briefl y tap the
center
SET key on the right touch pad: