Trio Avionics EZ Pilot - v 2.3 - Manual (Page 35)

31
SERVO POS = 7500
SERVO POS X 7528
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.
7.8 Repositioning the Servo Crank Arm
To suit your particular installation, you may need to reposition the servo crank arm to get the
correct geometry to drive the roll control system. This can be accomplished by rotating the crank
arm to one of 4 positions, in 90 degree increments.
It is important, because the screws are secured with Loctite®, to apply heat with a heat gun
before attempting to loosen the four screws. Failure to heat the assembly will more than likely
cause the screws to break off when being removed.
To reposition the servo Crank Arm, perform the following steps:
1. Use a #2 Phillips screwdriver to remove the screws.
2. Rotate the crank arm to the correct position for your installation.
3. When satisfied with the positioning, apply a small amount of Loctite® 222 to the
screws, reinsert and tighten the screws.
7.9 System Optimization, Flight Time, Distance Counters and Totalizers
7.9.1 System Optimization
The response of the aircraft to system commands can vary considerably depending upon
a number of factors. The mass of the airplane, the sensitivity to control movement, and
the way the ailerons are rigged can affect aircraft response to control movement.
The EZ Pilot allows the pilot to adjust 3 system parameters to achieve optimum
performance. However, care must be exercised when adjusting these numbers. Too
much gain may cause the aircraft to hunt, or oscillate, around the course line. Too little
gain will result in slow response to system commands or offsets in tracking.
The 3 adjustable parameters that are available to the pilot are:
1. FINE CRS QLT: Fine course quality. This adjustment controls how sensitive the
system is to course commands when in the Course (CRS) mode, and within 5