Hello, does anyone can explain way the acc level is measured everytime i start the APM ?

Way the APM not work like a multirotor that the adjusted horizontal level are stored in EEPROM ?

 

today i started my apm in an not horizontal surface then the aircraft every roll to right.

if a correct level are in the EEPROM this problem never occour.

 

sorry for my poor english.

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> Hello, does anyone can explain way the acc level is measured everytime i start the APM ?

 

Because the accelerometers are not temperature compensated. Every time you start up they may be different.

 

> Way the APM not work like a multirotor that the adjusted horizontal level are stored in EEPROM ?

 

What multirotor are you referring to? The why, see previous answer.

 

> today i started my apm in an not horizontal surface then the aircraft every roll to right.

 

Then don't do that.

 

> if a correct level are in the EEPROM this problem never occour.

 

This is an open source, DIY project. Alter the source to suit your needs.

 

Well, i fly mikrokopter for years and never have problem with temperature in acceleromter.

I have my own multirotor flight controller and only do the ACC level calibrate when i installed the board on the frame.

The multiwii use the e2prom stored acc level in multirotor but in fixed wing it use acc level when system start.

I never understand way fixed wing use this kind of acc level.

 

BTW, i think ACC are not affected by temperature .

I never see anything about this in datasheet.

 

I modify my APM to work with E2PROM stored ACC level.

 

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