X-3D-BL User’s Manual
ning and the low-battery shut down using the X-
Control software. Therefor you have to connect
the X-Base to your PC using the USB adapter
and click on ”X-Base”, ”Connect” and then on
”Parameters”.
4.2 Hints for using the X-ACC
mode
•
In the X-ACC mode it is particularly important
that the vehicle is not moved at all during the
initialization. Calibration errors caused by sha-
king during startup will influence the performan-
ce much more than in the heading-hold mode. If
the vehicle tilts more and more after starting the
motors, it is very likely that it was moved during
the initialization. In this case, please turn it off
and on again and make sure that it is not mo-
ved until the X-3D displays the green+yellow or
green light pattern.
•
If your X-3D-BL has the X-ACC module and the
X-ACC firmwares installed it behaves different
in case of a reception loss. If there is no R/C si-
gnal it will activate the X-ACC mode, try to get
to a horizontal orientation and start to sink with
1/3rd of full throttle. It will keep this state un-
til it regains reception. If one of the propellers is
blocked after the landing, the X-BLDC control-
lers will turn off the connected motor after 10
tries to restart it. Attention! With the X-ACC in-
stalled there is no audible signal if reception is
lost, as the motors are used to do a safe landing
instead of playing signal tones.
•
If the ambient temperature changes rapidly, for
instance when you leave a warm room, the
angles measured by the X-3D and X-ACC might
not be totally correct. That means that your ve-
hicle may be tilted a bit, even with the pitch and
roll stick centered and the trimmers in the right
position. In this case we recommend to wait a
few minutes, until all sensors have adopted to the
ambient temperature. You could also fly using
the Heading-Hold mode during that period, as it
is more robust against changes in temperature.
4.2.1 Trim memory function
The X-3D and the X-3D-FunPilot are able to save
the actual trim setting on your RC transmitter to ena-
ble smooth switching between X-ACC and heading
hold mode. Two functions can be selected with the
RC transmitter.
A simple method to correctly calibrate your trim me-
mory:
•
Reset trim memory (Motors off, full throttle, full
yaw to the right)
•
Fly in the X-ACC mode and trim the UFO
•
Land, stop motors and save the trim (Motors off,
full throttle, full yaw to the left)
•
Set the trimmers on your remote to 0 and start
flying normally.
4.3 Usage hints for the
X-3D-FunPilot
4.3.1 Optimisation of the pressure
sensor
The pressure sensor of the X-3D-FunPilot is sensiti-
ve to light and air movements perpendicular the the
sensor opening (e.g. by wind during a forward flight).
Therefore it’s recommend for the best performance,
especially outdoor, to add a small air filter to the pres-
sure sensor. A prooven technique uses some schrin-
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