Page 8
rev 2.0.03
6.2
Calibrating the servos
In this section you’ll calibrate the servos. The goals are:
Maximise control surface movements
Achieve a left/right symmetry regardless of linkage differences
Linearise responses.
All the adjustments in this section are made in CAL mode.
Note:
correct calibration is essential for diff to work correctly, and for precise tracking of flaps with ailerons.
6.2.1
Prepare for calibration
Switch on the transmitter (do not power up the receiver yet)
Enter CAL mode, and set switch
SA
to middle.
Power up the receiver
Open the
OUTPUTS
menu
6.2.2
Set servo rotation
Set the servo rotation according to table below. Pay attention to notes regarding aileron and elevator.
Stick command
Control surface
Notes
Aileron stick right →
RtAil goes up ↑
LtAil goes up↑
In CAL mode,
ailerons move together!!
Thr stick forward ↑
RtFlap goes up↑
LtFlap goes up↑
Ignore any “invert throttle” message
when reversing an output.
V-TAIL only:
Ele stick forward ↑
RtVee goes up ↑
LtVee goes up ↑
In CAL mode,
elevator(s) operate in
reverse to normal!!
X-TAIL only:
Ele stick forward ↑
Ele goes up ↑
X-TAIL only:
Rudder stick right →
Rud goes right
To change the direction of an output:
1.
Skip to the Direction field
2.
Press
{
ENTER
}
, and immediately
{
EXIT
}
Finally, check operation as follows:
Exit CAL
Enter Cruise mode.
Check for correct direction of aileron, elevator and rudder (note: the flaps cannot be checked yet).
6.2.3
Calibrate servo end-points and centres
In this section you’ll use the
OUTPUTS
menu to adjust the end points and centres of the servos. When setting
end-points, consider all inputs affecting the servo. For example, flap movement should be allow for crow
and aileron inputs. Otherwise a servo may stop dead before the commanded position is reached, resulting
in deadband at the stick (sometimes this will be unavoidable – or even desirable!).
If you don’t know the movements required for your model, then set servo end-points to maximum subject to
restrictions below.
New in version 2
: calibration uses curves.
Leave min/max/subtrim at -150/150/0.
