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AutoQuad Forum • View topic - DIMU calibration

DIMU calibration

Info & Discussions about good ole AQ6, taken to the next level.

Re: DIMU calibration

Postby epyonxero » Tue Apr 08, 2014 7:14 pm

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Re: DIMU calibration

Postby afernan » Wed Apr 09, 2014 2:35 pm

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Re: DIMU calibration

Postby epyonxero » Thu Apr 10, 2014 4:50 pm

Can someone tell me what might cause this type of oscillation in PH? I had the same problem with an AIMU board I started a thread about it but didnt get a reply, this data is from a new DIMU board. You can see motor output surging when in PH mode.

Screenshot (12).png
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Re: DIMU calibration

Postby epyonxero » Mon Apr 14, 2014 11:46 pm

Can someone from the development team please take a look at the issues above?
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Re: DIMU calibration

Postby JussiH » Tue Apr 15, 2014 1:06 am

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Re: DIMU calibration

Postby epyonxero » Tue Apr 15, 2014 3:30 am

Attachments
Screen Shot 2014-04-14 at 9.28.03 PM.png
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Re: DIMU calibration

Postby chschmid » Tue Apr 15, 2014 5:41 am

Your log looks weired. Did you ever try a standard mixing table with the motors not reversed? All mots connected right?
Did you balance your props? Could you post a pict of your copter or a vid of this flight. It seems that you have a lot of vibs. Your ACCx is going over 5! Ok would be between 0.5 and 1. Same for ACCy.

Cheers
Christof
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Re: DIMU calibration

Postby teramax » Wed Apr 16, 2014 6:44 am

just a simple question to all of you using the DIMU by now, "did you get a perfect horizon after calculation" and without TARE?
And dont beat me if i missed that point somewere but does the TARE funktion change something inside the DIMU board also?

Did calibrate 4 Boards till now, used the QCG with the DIMU modification, sent the files to other people and they did the cal for me but whatever i do the boards are never perfect level without TARE.

Next step 1, i build a freezing box with a fixed "heat up stand" to get 100% sure the board is perfect level also while static logging. Will see if this changes the outcomming.
Next Step 2, comparing onboard params calculated, default, calculated + tare, tare only just to be clear what is when written :)
somehow everything can fly
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Re: DIMU calibration

Postby joebar.rc » Wed Apr 16, 2014 6:59 am

Yes every time, I did 5 calibrations so far and all came out leveled. The tare itself does nothing in the dimu, the EEPROM store function is no active so it only zero's specific params in the current loaded config.
(Which btw isn't stored either until you use a save to rom obviously)
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Re: DIMU calibration

Postby s_sergiu » Wed Apr 16, 2014 10:29 am

I just loaded last firmware 376 and now we can save in DIMU's EEPROM as well.
Question: is TARE overwriting some calibration parameters (if DIMU calibration was already done and saved in to flash) after using QGC to store TARE values in permanent memory ?
Sergiu
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