Navaid Devices AP-1, Руководство пользователя

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CHECK INDEXING OF TURN AND TRIM CONTROLS
Check the TURN and TRIM CONTROLS for proper orientation of the indicator. The
limits of rotation of each control should stop the indicator at points equally displaced
from 6 o'clock, in which case the indicator will point straight up at the center of rotation.
The TURN CONTROL has a dead zone, which is anywhere in the center 10 degrees of
shaft rotation. The dead zone is there so that the control does not have to be exactly
centered to command a zero turn rate. Point the indicator straight up to put it tin the dead
zone.
Center the TRIM CONTROL and TRIM RANGE trimpot. Now the AP-1 should think
the airplane is flying straight and level, and the servo is locked into the position that it
would hold for neutral aileron. The crank arm will be positioned properly for level flight
in the following segment
INSTALL THE SERVO PUSHROD
Cut the pushrod to the proper length so that, when the servo is at neutral, the ailerons are
also neutral. Do not worry about being exactly correct-the ailerons can easily be jinked to
a new neutral.
Choose the longest possible crank arm radius that accommodates a pushrod range of
movement equal to or exceeding that required for full aileron travel. Be sure that the rod
end bearings never jam due to misalignment as the pushrod angle is varied by different
combinations of aileron and elevator input. Put the stick in all four comers.
SETTING SERVO NEUTRAL
Find the FEEDBACK pot: it is mounted on the servo frame above the motor (see Fig. 4),
and it has a small gear mounted on its shaft. If you twist that gear, the servo will crank
until you let go, indexing the crank arm to a new position. You can use this feature to jink
back and forth until you get the neutral located exactly where you want it.
NOTE: if the small feedback gear is very difficult to turn, loosen the set screw in the
larger gear somewhat. The output shaft must rotate with respect to its feedback gear when
the crank arm is indexing to a new position. IMPORTANT: After this adjustment, check
the setscrew again to make sure that it is not too loose.
SETTING SERVO RANGE
Another servo adjustment is a small trimpot located on the printed circuit board. This is
the servo RANGE trimpot, and turning it clockwise increases the range over which the
servo operates.