Trio Avionics EZ Pilot - v 1.9 - Manual (Page 34)

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SERVO POS = 7500
SERVO POS X 7528
7.6.3 Servo Direction Reversal
To reverse servo rotation, press the MODE switch one time until the arrow cursor
points at the NORM to the right of the SERVO readout. Move the L-R switch
either direction to change the NORM in line 2 to read REV; then, press the mode
switch several times to scroll through the remaining setup screens and return to
the NO GPS display. The servo rotation is now in the “reversed” state.
Turn the autopilot off and return to paragraph 7.6.1 of this procedure and
retest the servo rotation direction.
7.6.4 Servo Neutral Setting
Use the L-R switch to move the ailerons until they are in the proper neutral
position. This is the approximate position of your ailerons that you observed in
trimmed, level cruise flight.
Exit the display by pressing the MODE switch several times until the display
cycles back to the NO GPS display. This will store the adjustments you made
into the non-volatile memory.
7.7 In Flight Adjustment of Servo Neutral
The final check of Servo Neutral is conducted in flight. Be sure that the airplane is in
straight and level flight, the GPS is providing tracking data to the autopilot, and the
airplane is properly trimmed (using the aircraft roll trim) so that there is no tendency to roll
off to the right or left. Turn the autopilot off, then back on while pressing and holding the
DISPLAY button. Release the DISPLAY button and then press the SERVO button to
engage the servo.
If the aircraft tends to turn to the right with
the servo on, disengage the servo and push
the L-R switch to the left for a very brief
period. You will see the readout numbers
decrement and this should reduce the
tendency to turn right. Level the airplane
manually and re-engage the servo. If it still
shows a tendency to turn, repeat the
process until the aircraft remains stable in
level flight.
Similarly, if the aircraft tends to turn left, disengage the servo and push the L-R switch to
the right to compensate. Re-level the aircraft; then engage the servo again to check for
any remaining tendency to turn. Repeat this exercise until the aircraft remains stable with
no tendency to turn when the servo is engaged.
Once the final Servo Neutral is achieved, you should never have to adjust it or your
servo again unless you make modifications to your airframe or controls that
change the servo mechanical zero position. The settings that you achieved are
stored in non-volatile memory and are not affected when you turn the unit off.