Futaba 6EXH User Manual
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correct throw. The pushrods should first be connected to the servo arms and control horns so
that the correct, or near correct control surface throw will be achieved. THEN the EPAs may
be used to make small changes in the servo throw until the desired control throw is achieved.
The control throws should be set up so that the “end points” are as near to 100% as possible.
If the EPA values must be set below 70% or above 120% to get the desired throw, you
should strongly consider changing the pushrod connections so the values can be set closer
to 100%. (When the EPA is set to 100% the maximum servo throw for channels 1, 2, 3 & 4 is
approximately 40° and approximately 55° for channels 5 & 6.)
To set the end points:
1. Enter the programming mode and use the MODE key to access the
“EPA” screen. The
channel number being adjusted will the left side on the screen and the “%” symbol will be
flashing.
2. To change the RIGHT aileron throw move the aileron stick to the right, then push the DATA
INPUT lever up or down to change the value and the throw.
3. Move the stick to the left and use the DATA INPUT lever to change the LEFT aileron throw.
4. Use the SELECT key to display the other channels and set the other end points. Notice that
moving the stick (or switch or dial) from one end to the other changes the value displayed
and the position of the arrow for that “end” of the control input.
TRIM Trim Settings
There are four trim levers (“trims”) on the front of the transmitter. Three of the trims are for adjusting the neutral position of the
aileron, elevator and rudder servos. The fourth trim is for setting the idle r.p.m. of the engine when the throttle stick is all the
way down. The intended use of the trims is to make small servo adjustments, in flight, to get the model properly “trimmed” (so
it will fly straight-and-level). Because the trims are intended to be used while the model is in flight, you do not have to “enter
the program” to adjust the trims. Simply push or pull on the trim levers while flying and the neutral position of the servos will
shift. Keep in mind that you should start out with the control surfaces centered when the servos are centered and the trims are
“zeroed” (or near zero).
THEN you can adjust the trims once airborne.
Center the servos:
1. Turn on the transmitter and receiver. Operate the controls to make sure the servos respond in the correct direction. Use the
reversing function to reverse any servos necessary.
2. Center the throttle control stick.
3. Place the servo arms on the servos so they are perpendicular to the pushrods (see page 5). It is okay to cut off any unused
servo arms.
4. Connect the pushrods to the control surfaces. Adjust the length of the pushrods until the control surfaces are centered when
the servos are centered.
Note: The throttle trim affects the throttle servo only when the throttle stick is below “1/2 stick.” This way, the final closing of
the carburetor can be adjusted without affecting the servo throughout the rest of the range.
To adjust the trim settings:
Once the servos and control surfaces have been connected and the control throws have been set using the end points and
dual rates, get the model airborne. Adjust the trims as necessary to get the model to fly straight-and-level. If much trim is
required on any one control it is a good idea to readjust the pushrods so the trims can be returned to neutral (zero). Adjusting
the trims with the trim levers changes the servo’s position in increments of “4.” If finer adjustments are required, land the
model, then enter the program as described below to adjust the trims in increments of “1.”
1. Enter the programming mode and use the MODE key to activate the TRIM menu.
2. Press the SELECT key to display the channel to be adjusted (the figure shows trim
adjustment for CH1).
3. Adjust the trim using the DATA INPUT lever. Note that initially, the values change in
increments of “1,”but if the DATA INPUT lever is held long enough the values will change
more rapidly.
4. Repeat the steps for other channels that require trim adjustments.