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world but these wide limits mean it’s more likely the
compass calibration has not calculated good
offsets and should be repeated.
Compasses inconsistent
: the internal and external compasses are pointing in different directions
(off by >45 degrees). This is normally caused by the external compasses orientation (i.e.
COMPASS_ORIENT parameter) being set incorrectly.
GPS related failures:
GPS Glitch
: the GPS is glitching and the vehicle is in a flight mode that requires GPS (i.e. Loiter,
PosHold, etc) and/or the circular fence is enabled.
Need 3D Fix
: the GPS does not have a 3D fix and the vehicle is in a flight mode that requires the
GPS and/or the circular fence is enabled.
Bad Velocity
: the vehicle’s velocity (according
to inertial navigation system) is above 50cm/s.
Issues that could lead to this include the vehicle actually moving or being dropped, bad
accelerometer calibration, GPS updating at below the expected 5hz.
High GPS HDOP
: the GPS’s HDOP value (a measure of
the position accuracy) is above 2.0 and the
vehicle is in a flight mode that requires GPS and/or the circular fence is enabled. This may be
resolved by simply waiting a few minutes, moving to a location with a better view of the sky or
checking sources of GPS interference (i.e. FPV equipment) are moved further from the GPS.
Alternatively, the check can be relaxed by increasing the GPS_HDOP_GOOD parameter to 2.2 or 2.5.
Worst case the pilot may disable the fence and take-off in a mode that does not require the GPS (i.e.
Stabilize, AltHold) and switch into Loiter after arming but this is not recommended.
Note: the GPS HDOP can be readily viewed through the Missio
n Planner’s Quick tab as shown
below.
INS checks (i.e. Accelerometer and Gyro checks):
INS not calibrated
: some or all of the accelerometer’s offsets are zero. The
Accels not healthy
: one of the accelerometers is reporting it is not healthy which could be a
hardware issue. This can also occur immediately after a firmware update before the board has been
restarted.
Accels inconsistent
: the accelerometers are reporting accelerations which are different by at least
1m/s/s. The accelerometers need to be re-calibrated or there is a hardware issue.
Gyros not healthy
: one of the gyroscopes is reporting it is unhealthy which is likely a hardware issue.
This can also occur immediately after a firmware update before the board has been restarted.
Gyro cal failed
: the gyro calibration failed to capture offsets. This is most often caused by the
vehicle being moved during the gyro calibration (when red and blue lights are flashing) in which
Summary of Contents for Mini Pix
Page 4: ...4 1 2 Connectors ...
Page 5: ...5 Parameters ...
Page 14: ...14 4 Place vehicle DOWN and press any key to save setting ...
Page 46: ...46 Hexacopter Octocopter Y6 ...