Operation Manual

A
case
for a mixer
-
a USR-MIX
mixer.
Second
example:
in a model boat
with
2 motors and
2
screws
the
motors
are required
to support
the
rudder.
When
"right
rudder" is applied,
the
left motor
is to be
fed
with more
current,
and the
right one
less; and
the
other
way round
when
"left
rudder"
is
applied.
Here
we
need tvvo
mixers ol the
same
type for
the
inouts
"
rudder"
and
"
motor":
Independent
of the
13 ready-made
mixer systems,
each
of
which
you
can apply
I times,
you
now have
the USR
mixers.
These can
be assigned
up to
1.0 different
inputs
for all
four channels.
That means:
10"
possible
mixers
oer
servol
Sample
applications:
As
the
first example,
imagine
an electric-powered
model aircraft.
lmagine also
that it
has the unpleasant
habit of
becoming
more and
more tail'heavy,
the
more
the
"throttle"
is opened
(the
more
power
is ted to the
motor). Quite
why this
occurs
we don't
need to waste
time
thinking
about:
perhaps
the modeller
just
wanted
an easy
life, or
maybe
he made a
mistake at
the build-
ing board.
Now,
wouldn't
it
be
nice
if we could
mix down'elevator
in with
the
"throttle"
automatically,
so
that more
"down"
was aDDlied
as the
throttle
was opened.
We would
then
need a
"motor"
and
"elevator"
mixer.
Ot the
four
possible
inputs
we need only
2: one
jor
"MOTOR',
the
other
for
"ELEVATOR".
In line 1
(Number
and
"name"
oJ the
mixer)
you
will see
"USR-MlX1";
i.e.
there
is nothing to
be done
here.
Now we will
"define"
the
inputs
in turn:
in line 1
you
will
see
"lNP1",
which
is the first
input;
we
can
leave
it as
it
is.
Press
the
Z
key; and
the
"type
of input"
=
control
function can be
entered.
Leaf through
with the
E
key
until
"MOTOR"
appears.
That's
it done.
Now to
the second
input.
Press the
!
key,
followed by
El.
"lNP1"
turns
into
"lNP.2".
Press the
Z
key again,
then
leaf through
with the
El
key until
"
ELEVATOR"
appears:
rl_l5F:-t,lI
l':1
i
+T+F:]
r I f iF
. i: ELEr,.rH
I
Now
you
really
are
finished.
Inputs 3 and
4 are not
It is always
possible
that there
could be
something
undesirable
left
here from an
earlier
mixer definition,
so
we ought
to have a
look, to be
on the safe
side:
Select
input 3
as discussed
above.
ll
you
see
(Nothing)
there,
move on
immediately
to
input No.
4; otherwise
leaf through
with the
E
key until
appears.
Repeat
the
process
with input
4.
This
really does
complete
the task.
Leave the
menu
in
the usual
way
with the
@
key.
At this
point
a
little
"operating
convenience"
is built
in:
you
are taken
immediately
to
the
"Assign
sewos"
menu,
where
you
can
carry out
this
process.
lf
you
do
not wish
to do this,
just
press
@
again.
The result
of
your
work, in diagrammatic
form:
n#liif_,if
"",".
ffiiilr8lil
To assign
this
mixer to
the elevator
servo,
leal through
until vou see
"Servo
No.
.
controls
USR-Mlxl'.
'
I
number
ot seNo
lf
you
want to adiust
this servo,
you
must then,
as
with
thö other
mixers,
adjust both
inputs
"MOTOR"
and
"EL-
EVATOR".
The
second
example
in abbreviated
form:
For this
you
use
USR mixer
2.
Assign
"MO'rOR"
to
input
1;
"
RUDDER"
to
input 2.
ft
you
assign
'MOf
-2'
to
the 3rd
input, then
a further
relinement
is automatically
available.
Why
not try and
work
out
what it is?
(clue:
bear
in
mind that
you
can
later switch oft
or set
inputs to
zero).
Input4
is again set
to
(Nothing).
This mixer
in diagrammatic
form:
elevator
+
trim
molor
etevalor
servo
motor
controller
R.H. motor
motor controller
L.H.
motor
motor
rudder
+
trim
motor
rudder
+
trim
lf the
two
molors
have already
been set
for separate
control
from
the transmitter,
using
the assignments
'MOTOR"
and
"
MOTOR-2",
then
the solution
can
be
even
more sophisticated,
but
we won't
go
into that
here.
How
to
"define"
the mixer
Every definable
mixer
has tour
inputs.
To define
the
mixei,
we need
to tell the
transmitter
which control
func-
tions
it is to send
to these
inputs.
That
is what
we mean
by
"defining".
Naturally,
this
is done by
means
of a
menu, which
you
will
find
in the
"bottom
right-hand
corner"
of
the
"As'
signing"
menu.
Starting
from the
Status display,
more to
the
"Assign-
ing"
menu with
the key sequence @ Z N
;
then select
"USR-MlX"
with the
Z
key.
You will see
this display:
rutFt-f'lI
iil
i
+T+E:i
rIl'.|F.1:
rj".
r
Now
we
will
detine
the
mixer
for the
first example.
This will be
USR
mixer 1.
motor
ruooet
molor
(motor
controller)
motor 2
nothing
cl