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CalibrateCompass

Calibrate Compass


https://gallery3.mikrokopter.de/var/albums/intern/sonstiges/Button-Baugruppe/Button350x150/Button_CaliCompass.jpg?m=1484838586


Inhaltsverzeichnis

  1. Calibrate Compass
    1. The calibration
  2. Videos
  3. Check the calibration



Calibrate Compass

The compass (and the GPS) is needed for the automated control of the MikroKopter.
Therefore a new compass must be calibrated once for a proper function.

If the compass has not been calibrated, compass and GPS supported features can not be used and you can not start the copter.
An error message is then displayed via the telemetry.

A recalibration of the compass is usually only necessary when the Kopter fly under the "PositionHold" function in circles at a remote location.





The calibration

Please note

Calibrate the copter outside, far away from magnetic influences!

During the calibration you have to turn the copter completely around the axis.

The following applies: If you calibrate the compass precisely, the copter will fly perfectly.

If the copter is flying in circles (with activated function PositionHold and in an altitude above houses and trees), you better calibrate the compass new.

When you have problems after the calibration (e.g. an err22), a magnetic problem on your copter can be the problem.
Informations for the "magnetic error" can be found here:: MagnetError



The calibration will be done in 5 steps:

Step

Funktion

Beispielansicht / Funktion

Step 1
Initiate compass calibration

Nick down
(and hold)

then

Throttle up + Yaw left

(The Kopter beeps 1x)

https://gallery3.mikrokopter.de/var/thumbs/intern/KompassKalibrieren/MC32_CompassKali_2.jpg?m=1484305663

Step 2
Start Calibration

Pull Nick down 1x

(The Kopter beeps 2x and the clicking starts)

https://gallery3.mikrokopter.de/var/thumbs/intern/KompassKalibrieren/MC32_CompassKali_1_Roll_down.jpg?m=1484305663

Calibration of the X-Axis (Nick-Axis)

The Kopter with the front
(Arrow direction of the FlightCtrl)
pointing to the South or North,

then

rotate the Kopter a couple times completely over the Nick-Axis until the buzzer stops with the clicking.

https://gallery3.mikrokopter.de/var/thumbs/intern/KompassKalibrieren/MK8-Kalibrierung-front.jpg?m=1484305664

Rotate the Kopter

Rotate the Kopter by 90°.
The clicking starts again.

https://gallery3.mikrokopter.de/var/thumbs/intern/KompassKalibrieren/MK8-Kalibrierung-drehen.jpg?m=1484305663

Calibration of the Y-Axis (Roll-Axis)

Rotate the Kopter a couple times completely over the Roll-Axis until the buzzer stops with the clicking.

https://gallery3.mikrokopter.de/var/thumbs/intern/KompassKalibrieren/MK8-Kalibrierung-Seite.jpg?m=1484305664

Step 3
Finish the calibration of the X and Y-Axis

Pull Nick 1x down

(The Kopter beeps 3x)

https://gallery3.mikrokopter.de/var/thumbs/intern/KompassKalibrieren/MC32_CompassKali_1_Roll_down.jpg?m=1484305663

Step 4
Start calibration of the Z-Axis (Yaw-Axis)

Pull Nick 1x down

(The Kopter beeps 4x and the clicking starts)

https://gallery3.mikrokopter.de/var/thumbs/intern/KompassKalibrieren/MC32_CompassKali_1_Roll_down.jpg?m=1484305663

Calibration of the Z-Axis

INFO: Here it doesn't matter if the Kopter shows with the X or Y-Axis towards South (North).

Rotate the Kopter a few times completely over the Roll- or Nick-Axis until the buzzer stops with the clicking.

https://gallery3.mikrokopter.de/var/thumbs/intern/KompassKalibrieren/MK8-Kalibrierung-Seite.jpg?m=1484305664

Step 5
Finish the calibration of the Z-Axis.

Pull Nick 1x down

The Kopter confirms it with 2 beeps

https://gallery3.mikrokopter.de/var/thumbs/intern/KompassKalibrieren/MC32_CompassKali_1_Roll_down.jpg?m=1484305663



Now that the Kopter "beeped" 2x after a successful calibration that part is done.







Videos









Check the calibration

You can now check the calibration of the compass in the KopterTool or also with a suitable transmitter.

Please do this also outside, far away from magnetic influences!

Here you have to check two values:

  • MAG (or Field) = This should be around 100%
  • Inclination (Incl) = This should be nearly the same value as the one in brackets

IMPORTANT:
To see the right values you have to calibrate the Gyros first (throttle up + yaw left).
Without calibration you will still see 100% and no Inclination.





Check via KopterTool

Here you use:

  • a MK_USB or a wireless connection between Copter and Computer
    +

  • you have calibrate the Gyros (throttle up + yaw left).

https://gallery3.mikrokopter.de/var/albums/intern/KopterTool_ab_V2_0/Details/KopterTool-Display_MagneticField.png?m=1455608488



In the main window of the KopterTool click the button [NaviCtrl].

Under the virtual display klick the red arrow (left or right) until the window "Magnetic Field" displayed.

The value for "Field" must be around 100% and the value for Inclination around the value you see in brackets.
(If the value for "Field" (or for "Inclination") is ~10%-15% higher/lower then 100%, recalibrate the compass)







Check via HoTT transmitter

You have calibrate the Gyros (throttle up + yaw left).
In the lower display of the Graupner HoTT transmitter you can open the text telemetry and check there the magnetic value.

https://gallery3.mikrokopter.de/var/resizes/intern/HoTT/HoTT-Display_MAG-en.png?m=1446805736



  • press the ESC key longer

    -> the TELEMETRY window opens

  • change to SETTING & DATA VIEW

  • press SET

    -> RX DATAVIEW window opens

  • on the SET button press right until you see the last window with the text-telemetry
  • to change the view of "0m/s" to "MAG" press SET once.

The value for "MAG" must be around 100% and the value for Inclination (incl) around the value you see in brackets.
(If the value for "Field" (or for "Inclination") is ~10%-15% higher/lower then 100%, recalibrate the compass)