a direction question about lisa/m 2.0 board

> Hi,everyone.
> I am a beginer,i am building my first quadcopter now.
> according wiki page
> ImuCalibration(http://wiki.paparazziuav.org/wiki/ImuCalibration),
> calibrate my lisa/m 2.0 board.
> but i can not distinguish board's front and upside.
>
> plz look at this pic:
> http://tinypic.com/r/doumhc/9
>
> i think below picture is the upside, and the arrow is the front.
> is that correct? thank you.
>
> plz look at this pic:
> http://tinypic.com/r/2pre6nb/9
>
> _______________________________________________
> Paparazzi-devel mailing list
> [hidden email]
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>

> Hi,
>
> you should look at the tiny arrows on the Aspirin IMU on the bottom side of
> the Lisa board. The picture you sent shows the bottom side of the board, but
> without the Aspirin IMU.
>
> Balazs
>
>
> 2017.03.08. 5:59 keltezéssel, Hao Zhang írta:
>>
>> Hi,everyone.
>> I am a beginer,i am building my first quadcopter now.
>> according wiki page
>> ImuCalibration(http://wiki.paparazziuav.org/wiki/ImuCalibration),
>> calibrate my lisa/m 2.0 board.
>> but i can not distinguish board's front and upside.
>>
>> plz look at this pic:
>> http://tinypic.com/r/doumhc/9
>>
>> i think below picture is the upside, and the arrow is the front.
>> is that correct? thank you.
>>
>> plz look at this pic:
>> http://tinypic.com/r/2pre6nb/9
>>
>> _______________________________________________
>> Paparazzi-devel mailing list
>> [hidden email]
>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>>
>
> --
> Balazs GATI, PhD
> associate professor
>      Department of Aeronautics, Naval Architecture and Railway Vehicles
>      Budapest University of Technology and Economics
>
> Address:   Budapest
>           Stoczek u 6. J. ép. 423
>           1111
> Tel:       +(36)-1-463-1960
> Fax:       +(36)-1-463-3080
> Homepage: http://vrht.bme.hu/
>
> _______________________________________________
> Paparazzi-devel mailing list
> [hidden email]
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel

> Hi Balazs!
> thanks for your reply.
> you are right, on the Aspirin IMU wrote axis as below:
>
>          x
>          |
>          |
> y-------N
>
> so the x point is the front, right?
>
> and my another question whitch is the upside in the calibrating the
> accelerometers.
> is the lisa/m board upside or the Aspirin IMU board upside?(you know
> that they are opposite)
>
>
> 2017-03-08 14:44 GMT+08:00 Balazs GATI <[hidden email]>:
>> Hi,
>>
>> you should look at the tiny arrows on the Aspirin IMU on the bottom side of
>> the Lisa board. The picture you sent shows the bottom side of the board, but
>> without the Aspirin IMU.
>>
>> Balazs
>>
>>
>> 2017.03.08. 5:59 keltezéssel, Hao Zhang írta:
>>>
>>> Hi,everyone.
>>> I am a beginer,i am building my first quadcopter now.
>>> according wiki page
>>> ImuCalibration(http://wiki.paparazziuav.org/wiki/ImuCalibration),
>>> calibrate my lisa/m 2.0 board.
>>> but i can not distinguish board's front and upside.
>>>
>>> plz look at this pic:
>>> http://tinypic.com/r/doumhc/9
>>>
>>> i think below picture is the upside, and the arrow is the front.
>>> is that correct? thank you.
>>>
>>> plz look at this pic:
>>> http://tinypic.com/r/2pre6nb/9
>>>
>>> _______________________________________________
>>> Paparazzi-devel mailing list
>>> [hidden email]
>>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>>>
>>
>> --
>> Balazs GATI, PhD
>> associate professor
>>      Department of Aeronautics, Naval Architecture and Railway Vehicles
>>      Budapest University of Technology and Economics
>>
>> Address:   Budapest
>>           Stoczek u 6. J. ép. 423
>>           1111
>> Tel:       +(36)-1-463-1960
>> Fax:       +(36)-1-463-3080
>> Homepage: http://vrht.bme.hu/
>>
>> _______________________________________________
>> Paparazzi-devel mailing list
>> [hidden email]
>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
> _______________________________________________
> Paparazzi-devel mailing list
> [hidden email]
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>

> Hi,
>
> yes, x is the first (generally front) direction and z looks toward you in
> the picture while looks downward in a normal airframe. But later you can
> define its direction relative to the airframe in the airframe config file.
>
> At first the directions of the IMU are important (not that of the Lisa board
> or the airframe). But unfortunately I don't have too much experience with
> Aspirin calibration yet, because we are using xsense sensor with its own
> calibration tool.
>
> Regards,
>  Balazs
>
>
>
> 2017.03.08. 9:20 keltezéssel, Hao Zhang írta:
>>
>> Hi Balazs!
>> thanks for your reply.
>> you are right, on the Aspirin IMU wrote axis as below:
>>
>>          x
>>          |
>>          |
>> y-------N
>>
>> so the x point is the front, right?
>>
>> and my another question whitch is the upside in the calibrating the
>> accelerometers.
>> is the lisa/m board upside or the Aspirin IMU board upside?(you know
>> that they are opposite)
>>
>>
>> 2017-03-08 14:44 GMT+08:00 Balazs GATI <[hidden email]>:
>>>
>>> Hi,
>>>
>>> you should look at the tiny arrows on the Aspirin IMU on the bottom side
>>> of
>>> the Lisa board. The picture you sent shows the bottom side of the board,
>>> but
>>> without the Aspirin IMU.
>>>
>>> Balazs
>>>
>>>
>>> 2017.03.08. 5:59 keltezéssel, Hao Zhang írta:
>>>>
>>>>
>>>> Hi,everyone.
>>>> I am a beginer,i am building my first quadcopter now.
>>>> according wiki page
>>>> ImuCalibration(http://wiki.paparazziuav.org/wiki/ImuCalibration),
>>>> calibrate my lisa/m 2.0 board.
>>>> but i can not distinguish board's front and upside.
>>>>
>>>> plz look at this pic:
>>>> http://tinypic.com/r/doumhc/9
>>>>
>>>> i think below picture is the upside, and the arrow is the front.
>>>> is that correct? thank you.
>>>>
>>>> plz look at this pic:
>>>> http://tinypic.com/r/2pre6nb/9
>>>>
>>>> _______________________________________________
>>>> Paparazzi-devel mailing list
>>>> [hidden email]
>>>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>>>>
>>>
>>> --
>>> Balazs GATI, PhD
>>> associate professor
>>>      Department of Aeronautics, Naval Architecture and Railway Vehicles
>>>      Budapest University of Technology and Economics
>>>
>>> Address:   Budapest
>>>           Stoczek u 6. J. ép. 423
>>>           1111
>>> Tel:       +(36)-1-463-1960
>>> Fax:       +(36)-1-463-3080
>>> Homepage: http://vrht.bme.hu/
>>>
>>> _______________________________________________
>>> Paparazzi-devel mailing list
>>> [hidden email]
>>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>>
>>
>> _______________________________________________
>> Paparazzi-devel mailing list
>> [hidden email]
>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>>
>
> --
> Balazs GATI, PhD
> associate professor
>      Department of Aeronautics, Naval Architecture and Railway Vehicles
>      Budapest University of Technology and Economics
>
> Address:   Budapest
>           Stoczek u 6. J. ép. 423
>           1111
> Tel:       +(36)-1-463-1960
> Fax:       +(36)-1-463-3080
> Homepage: http://vrht.bme.hu/
>
> _______________________________________________
> Paparazzi-devel mailing list
> [hidden email]
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel