Throttle Epa - FUTABA 6DA Instruction Manual

THROTTLE END POINT ADJUSTMENTS (EPA)
• Move the throttle stick to full
throttle. Does the barrel of the
engine's carburetor open
completely? Does it open
completely before the servo has
moved its full distance, so the
servo is pushing against the barrel
at full throttle causing the servo to
"buzz" or the pushrod to flex?
Always correct the throw as
closely as possible by adjusting
the linkage. Then use the Throttle
High EPA pot to fine-tune the full
throttle setting.
Turning the Throttle High
EPA pot counterclockwise
decreases the throttle
servo travel.
2. Adjust the servo's
end point.
• Now close the throttle
completely, including pulling the
throttle trim closed. Does the
barrel just close completely on
your engine as the trim hits
bottom? If not, adjust the Throttle
Low EPA pot until it does, so the
engine can be shut off safely
from the radio.
1. Move the throttle stick
to full up.
BEFORE
Servo
Buzzing
Pushrod
Bowing
AFTER
When adjusted
correctly, there is no
servo buzz or bowing
of the pushrod
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ADJUSTABLE SERVO TRAVEL (AST)
• Read your model's instructions to • Always adjust the throw as closely
determine the proper distance
each control surface should move.
This is called "throw." If the model's
instructions specify a "High" and
"Low" rate, use the High rate here.
With the dual rate switches in the
"off" positions, move each control
its full distance and measure the
throw. Note that it is very common
for your initial installation/set up to
provide you more or less
movement of the control surface
than is desirable to fly the aircraft.
1. Move the stick to
full deflection.
BEFORE
2. Measure the
Too Much Throw
as possible first by moving the
clevises in or out on the model's
control horns and servo arms.
(Using AST settings below 80%
will significantly affect the precision
of the servos' response to your
commands.) If needed, adjust the
AST pots for each surface until the
proper throw is set.
Turning the AST pot
counterclockwise
decreases the servo's travel
at full stick deflection.
3. Adjust the proper
AST pot.
AFTER
throw.
Correct Throw
13
4. Confirm
the throw is
correct.