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Copyright © 2019 Xflight Technologies LLC, Florida, USA
23
H.
SERVO Setup
It is important to ensure the servos are correctly orientated and ranges set.
The Flight Controller has been pre-configured to the following servo mappings:
Function
Parameter
Value
Servo (Output Channel)
Elevator (Pitch)
SERVO1
19 (Elevator)
1
Aileron (Roll)
SERVO2
4 (Aileron)
2
PWM (Pulse Width Modulation) servos act over a range of pulse width values typically ranging from
1000 µs to 2000 µs. These values define the min and max movement of the servo and hence the control
surface, typically over 90 degrees of servo movement. The following parameters can be adjusted to limit
min and max ranges (i.e. end points) as well as normal/reverse direction of movement:
These setting can be found under
SERVO1
and
SERVO2
:
SERVO1_FUNCTION
19
Function (
19 = Elevator
)
SERVO1_MAX
1900
Maximum deflection
SERVO1_MIN
1100
Minimum deflection
SERVO1_REVERSED
0
Direction of movement (
0 = Normal, 1 = Reversed
)
SERVO1_TRIM
1500
Mid value (Trim)
SERVO2_FUNCTION
4
Function (
4 = Aileron
)
SERVO2_MAX
1900
Maximum deflection
SERVO2_MIN
1100
Minimum deflection
SERVO2_REVERSED
0
Direction of movement (
0 = Normal, 1 = Reversed
)
SERVO2_TRIM
1500
Mid value (Trim)
Note that by default Servo Auto Trim is enabled. When the aircraft is close to level in a stabilized flight
mode, the servo trim is saved every 10 seconds, and persists between flights. This ensures that when
manual flight is selected, there should be no difference in trim. This can be disabled / enabled under
SERVO
settings:
SERVO_AUTO_TRIM
1
Servo Auto Trim
(1 = Enabled, 0 = Disabled)