130
Program description: free mixers
MIX1
6
el
trv
0%
0%
0%
offs
SEL
STO
The dotted vertical line indicates the position of the
mixer neutral point (“offset”), i. e. that point along the
control travel at which the mixer has NO influence on the
channel connected to its output. By default this point is
set to the centre position.
However, in our example the neutral (retracted) position
of the flaps is located at the left-hand end-stop of the
rotary proportional control, and in this position the eleva-
tor must not be affected. We therefore have to shift the
mixer neutral point exactly to that position. If you have
not already done so, turn the control - in our example
this is CTRL 7 - to the left-hand end-stop and touch the
central
SET
button of the right-hand touch-key. The dot-
ted vertical line now moves to this point - the new mixer
neutral point - which
always
retains the “OUTPUT” value
of zero in accordance with the mixer definition.
As it happens, this setting is difficult to show in a
screen shot, so we will change the “offset” value to
only -75%.
MIX1
6
el
trv
0%
0%
–75%
offs
SEL
STO
Notes:
If you wish, you can move the offset value back to
•
centre or otherwise adjust it as follows: select
SEL
using the arrow button
of the left or right-hand
touch-key, followed by briefly pressing the central
SET
button of the right-hand touch-key; you can now
use the arrow buttons of the left or right-hand touch-
key to move the offset value.
You can also return the mixer neutral point to cen-
•
tre automatically as follows: select
SEL
using the ar-
row button
of the left or right-hand touch-key, then
simultaneously press the two arrow buttons
or
of the right-hand touch-key (
CLEAR
).
Symmetrical mixer ratios
The next step is to define the mixer values above and
below the mixer neutral point, starting from its current
position. Use the arrow button
of the left or right-hand
touch-key to move to the “Travel” line: if necessary, use
the arrow buttons
of the left or right-hand touch-
key to select the
SYM
field, so that you can set the
mixer value symmetrically relative to the offset point you
have just programmed. Touch the central
SET
button
of the right-hand touch-key, then set the values in the
two highlighted fields within the range -150% to +150%
using the arrow buttons of the right-hand touch-key.
Remember that
the set mixer value always refers to
the input signal from the associated transmitter control
(control signal)
! Setting a negative mixer value reverses
the direction of the mixer.
Simultaneously pressing the two arrow buttons
or
of the right-hand touch-key (
CLEAR
) erases the
mixer ratio in the highlighted field.
The “optimum” value for our purposes will inevitably
need to be established through a flight testing pro-
gramme.
MIX1
6
el
trv +20% +20%
–75%
offs
ASY
SYM
Since we previously set the mixer neutral point to -75%
of control travel, the elevator (“el”) will already exhibit a
(slight) “down-elevator effect” at the neutral point of the
landing flaps, and this, of course, is not wanted. To cor-
rect this we shift the mixer neutral point back to -100%
of control travel, as described earlier.
MIX1
6
el
trv +20% +20%
–100%
offs
SEL
STO
If you were now to reset the offset from -75% to, say, 0%
control travel, by selecting the
SEL
field using the arrow
buttons
of the left or right-hand touch-key, and then
briefly pressing the two arrow buttons
or
of
the right-hand touch-key (
CLEAR
) simultaneously, the
screen would look like this:
Summary of Contents for mx-12 Hott
Page 1: ...Programming Manual 33116 mx 16 HoTT 3 en mx 16...
Page 35: ...35 For your notes...
Page 49: ...49 For your notes...
Page 55: ...55 For your notes...
Page 59: ...59 For your notes...
Page 63: ...63 For your notes...
Page 69: ...69 For your notes...
Page 91: ...91 For your notes...
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Page 181: ...181 For your notes...
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