User manual

207Program description - Free mixers
ty
fr
to
M1
M2
M3
6
7
7
8
M4
M5
??
??
??
??
??
??
Example:
Two mixers (MIX 6  7 and 7  8):
a) WITHOUT series switching:
6 6
7
Servo
4 8 V
C 577
Bes -Nr 4 01
Se vo
4 8 V
C 577
Bes Nr 410
7
8
Servo
4 8
C 577
Bes -Nr 410
MIX 1
MIX 2
b) The same mixers WITH series switching:
6 6
7
Servo
4 8 V
C 577
Bes Nr 410
Servo
4 8 V
C 577
B s -Nr 4101
7
8
Se vo
4 8 V
C 577
Bes Nr 410
MIX 1
MIX 2
In this highly simplified example, if mixer 2 is switched
in series, then it does not “take over” solely the trans-
mitter signal of control function 7 – as shown under
a) – but, instead, the entire (mixed) signal present at
the servo side of control channel 7, as shown under
b). It then directs this in accordance with its confi-
gured mixer ratio forwards to control channel 8. In
this case, the effect of transmitter control “6” extends
as far as output “8”. This kind of serial linkage can be
extended as far as you wish. For example, another
mixer “8  12” can be used to route the control signal
from “6” as far as output “12”, taking into considera-
tion the associated mixer ratios. Of course, even with
an active serial link, each separate mixer can still be
controlled via the transmitter control assigned to the
mixer input. Fixed-wing and helicopter mixers also
work in the same way, when set up to switch “in se-
quence”.
Including phase trim
If you wish to apply the FLAP channel (“6”) or FLAP2
channel (“9”) trim values stored in the »Phase trim«
menu – flight phase dependent – then first tap the
center SET key of the right four-way button and use
its selection keys to select “P”:
ty
fr
to
M1
M2
M3
6
11
M4
M5
??
??
??
??
??
??
P
??
??
Depending on the mixer value configured, a mixer
can, as shown in the example above, route the signal
from a flap control present (e. g.) on input 6 to control
channel 11, while also applying the FLAP trim value
set on the »Phase trim« menu, page 160, for the
respective flight phase.
Other special features of free mixers
Mixer input = mixer output
If you set up a mixer whose input is the same as
its output, e. g. “C1  C1”, you can achieve some
very special effects in conjunction with the option of
switching a free mixer on and off in any way you like.
A typical application of this can be found at the end of
this section, as Example 2 on page 213.
ty
fr
to
M1
M2
M3
6
EL
C1
EL
M4
M5
3
8
S
EL
??
??
C4
4
2
Tr
The effect of the C1 trim lever on mixer output will
depend on the function assigned in the »Model type«
menu, page 104, in the “Motor on C1” column for
fixed-wing models …
Trim Effect on mixer output
None linear over full trim lever travel
Forward Only effective if C1 stick is forward
Back Only effective if C1 stick is back
… or – in the case of model helicopters – in the “Thr.”
line of the »Stick mode« menu, which is available on
the
mc-20 HoTT transmitter only:
Trim Effect on mixer output
TA
(Thr-AR)
linear over full trim lever travel to out-
put 6 (throttle servo)
TL
(Throttle
limit)
only effective at minimum position of
the assigned throttle limit control (the
right side proportional rotary control as
standard)
PT
(Pitch)
linear over full trim lever travel to con-
trol function “Pitch”
Switching mixers in series
As already explained on page 204, you can also
switch mixers in series: Where mixers are switched
in “sequence”, the “input signal” of a control channel
already on its way to the servo “branches off” and is
directed to a further channel. In the “ty” column, select
the right angle bracket “
” or “Tr ”, if the trim should
also act simultaneously on the mixer input: