HITEC OPTIC 6 - RVMX - Revolution Mixing; SWAH - Swashplate Adjust (120° Swash Only)

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Menu Descri
p
tions
-
Helico
p
ter
RVMX
-
Revolution mixing
The revolution mixing function mixes pitch commands into
rudder (pitch rudder) in order to suppress the torque
generated
by changes in the main rotor's pitch angle and
rotational
speed. You can input independent values for
revolution
mixing above and below one-half throttle for each of
the
NOR, ST1, and ST2 flight conditions. Revolution mixing is
disabled
whenever throttle hold ( ST3 , operated by switch
SW -1 )ison.
For a clockwise-turning rotor, revolution mixing should apply
right
rudder when pitch is increased; for a counterclockwise-
turning
rotor, the opposite should occur. Remember to set the
value
for both sides of the throttle stick's motion.
Revolution mixing has no preprogrammed values input at the
start.
You will need to input values for your helicopter as
described
in the setup example.
Note: A procedure for adjusting revolution mixing is given in a
table
on page 56.
Revolution Mixing Programming
1. Call up the revolution mixing screen by repeatedly pressing
one
of the Up Down Edit buttons until the RVMX window
appears.
The function is active with 0% mixing turned on.
SW
AH
-
Swashplate adjust (120 ° swash only)
The swashplate menu is intended only for helicopters whose
collective
pitch is controlled by more than a single servo at a
time,
and is sometimes referred to as CCPM (Collective &
Cyclic
Pitch Mixing). The Optic contains settings for 120 °
swashplates. Consult your model's setup instructions to find
out
whether you need special swash settings.
The swashplate menu is used to control the response of all
three
collective servos as a group. It should NOT be used for
reversing
or individual servo travel adjustment. Perform these
settings
in the REV and EPA menus respectively.
When you move the collective stick, all swashplate servos
should
move in the same direction and the same amount to lift
or
drop the swashplate without tilting. If the swashplate should
tilt
to one side when you command collective, one or more
servos
is moving the wrong direction or the wrong amount, and
must
be adjusted in the SWAH menu. If the swashplate moves
down
when pitch should be increasing or vice versa, change
the
sign in front of all three servos from (+) to (-) or vice versa.
Note
that there is no SWAH menu when the NOR menu is
selected,
but the 120 ° swash type does contain the SWAH
menu. The swash default settings are shown below.
Put the throttle stick to its idle
p
osition.
NOR
No SWAH menu
120'
CH1 +70%, CH2 +70%,CH6 +70%
2.
Now press the Data +Increase key. This will increase the
percentage
of RVMX mixing for the low side of throttle. You
may
set a value of 0% to 100% for this side. If you wish to
return
the mixing percentage to the default 0% value, press
the
Active/Inhibit (Clear) key.
3. Move the throttle stick to a position above half-throttle, and
change
the percentage number to suit.
4. Now verify that the rudder responds both the correct
direction
and amount for travel on both sides when throttle is
commanded.
5. Set up the RVMX values for the other flight conditions ( ST1,
ST2
) by flipping the Flt. Mode (SW-3) switch and repeating
these
procedures.
FAIL - Failsafe
See the instructions on page 41.
Swashplate Programming
1. Consult your model's setup instructions. If three servos are
needed
to move the swashplate in a 120 ° CCPM set-up,
go to the model setup instructions (page 21) and select the
120 ° swash type.
2. With all the servos hooked up, and the transmitter and
receiver
turned on, move the throttle/collective stick up and
down.
The swash should move up and down with no
rotations.
Move the aileron stick left and right. The swash
should
tilt left and right without pitching or rising. Move the
elevator
stick. The swash should tilt fore and aft with no
rotations.
If there are rotations when collective is moved, or
the
swash moves up and down with aileron or elevator, you
need
to adjust the settings in the swash menu.
3. If the servos do not all respond in the same direction for
collective
or opposite directions for aileron and elevator, you
will
need to reverse one or more of them in the reversing
menu
( REV ). It may take a little trial and error trying different
combinations
of normal and reverse rotation to get the servos
to
respond properly. Don't worry about the direction they
respond,
just that they all move the same for collective and
tilt
for aileron and elevator.
Men
u
Description
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Helicopter
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Pa
g
e 54