TruTrak Digiflight II Instal Manual - Manual (Page 5)

DigiFlight II Series Ground Checkout
Must be performed before first flight
Once wiring is completed the autopilot should be tested in the aircraft while on the
ground. The first step is to enter the setup mode on the autopilot and set all parameters to
their correct values. Apply power to the autopilot programmer.
The initial screen should be displayed, along with the words PWR UP in the lower-right
of the display. After approximately ten seconds, the autopilot is ready to be set up for
operation, indicating AP OFF on the display.
Many of the operations of the autopilot are initiated or confirmed by a press and release
of the knob (without rotating it). This is referred to as the ENTER operation.
Disengaging of the autopilot is done by holding the knob in for an extended period of
time. Any time there is an underlined field showing on the autopilot screen, rotating the
knob will cause the underlined active field to change.
Engage the autopilot by pressing ENTER. Then press and hold the MODE button in for
about three seconds until the first setup screen, showing LAT ACTIVITY is displayed.
Once the activity setup screen is on the display, rotate the knob as necessary to set the
lateral activity value to a value of 2 or 8 if High Torque servo. Push the ALT button to
move to the next setup screen.
The next setup screen is LAT TORQUE. Insure that the value displayed is somewhere
close to the maximum value of 12. Once that is done, press the ALT button to advance
to the next setup screen.
Rotating the knob, select a value for BAUD which is compatible with the GPS receiver
connected to pin 17. The value of 9600 is the most commonly used rate. Once baud rate
selection is done, press the ALT button to advance to the next setup screen.
The next setup screen is the BANK ANGLE screen. Select an initial setting of MED.
Once this is done, press the ALT button to advance to the next setup screen.
The next setup screen is the MICRO ACTIVITY screen. This setting should be set
initially to a setting of 0. Once the micro activity is set to 0, press the ALT button to
advance to the final lateral setup screen.
The next setup screen is the GPS GAIN screen. This setup is used to increase the bank
angle that the autopilot will fly in GPS Steering mode. Increase the value to increase the
allowable bank angle. Press the ALT button to advance to the next setup screen.
The next setup screen is the YAW DAMPER screen. Set to Y if a yaw damper is
installed, otherwise, select N and Press the ALT button to advance to the next setup
screen.
Press the knob to exit, and return to the main flight screen.
Then press and hold the ALT button in for about three seconds until the first setup
screen, showing PITCH AXIS is displayed. (NOT USED IN DII) The default of ON
will always be selected after a power cycle. To turn the pitch axis off, select OFF, and
click the knob to exit. To advance to the next setup screen, press the ALT button to
advance to the next setup screen.
TruTrak Flight System 3 DigiFlight II Series Auto Pilot Installation Manual
December 2009 8300-008 Rev D