roll pitch yaw calibration

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saketroongta
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roll pitch yaw calibration

Post by saketroongta » Wed Jan 28, 2015 8:17 pm

Hey guys i am new to this thing . my flight data on the gui gives wrong output . i think gyro sensors are to calibrated again? anyone please help



arnaud
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Re: roll pitch yaw calibration

Post by arnaud » Thu Jan 29, 2015 9:15 am

Hi,

Can you precise what you mean by wrong output? Does the Crazyflie fly and what kind of output are you observing?

saketroongta
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Re: roll pitch yaw calibration

Post by saketroongta » Thu Jan 29, 2015 3:29 pm

on the crazyflie client we see flight data . that data is not correct even when i put the crazyflie on a flat surface . the output is way out the normal position

tobias
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Re: roll pitch yaw calibration

Post by tobias » Fri Jan 30, 2015 9:03 am

The gyros are automatically calibrated during start-up. The accelerometer isn't though but should normally be pretty level. Do you have a Crazyflie 1.0 or 2.0?

How much is the error? When you put it on a level surface what does the pitch and roll values say?

saketroongta
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Re: roll pitch yaw calibration

Post by saketroongta » Fri Jan 30, 2015 4:24 pm

i have crazyflie 2.0. the yaw , pitch and roll all show wrong output even when keep it on a flat surface

tobias
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Re: roll pitch yaw calibration

Post by tobias » Mon Feb 02, 2015 9:57 am

Can you please post how big the error is? What the roll and pitch actual values in the flight tab in the cfclient say?

What you can try is to put the CF2 on a level surface. Look at the actual output of the values in flight tab. Write these down and insert them in the Configure 2.0 dialog under pitch trim and roll trim values.
After a restart of the CF2 the actual roll/pitch values should now be close to zero.

oggy
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Re: roll pitch yaw calibration

Post by oggy » Sun Feb 08, 2015 1:08 pm

I'm having the same problem. After bootup on a flat surface the gui shows:-

pitch -4.57
roll -63.87
yaw -2.93

Is there a way to reset it? cause it was level at some point.

codeman
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Re: roll pitch yaw calibration

Post by codeman » Sat Mar 07, 2015 3:19 am

I get similar values at random. How can we calibrate the gyros?

poizone
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Re: roll pitch yaw calibration

Post by poizone » Sat Mar 07, 2015 5:26 am

This looks similar to a few crazy values people have been posting that end up being IMU issues. Have you crashed much since you got it? Also, is there any drift other than yaw drift?

I also have to wonder if the IMU is getting a bit hot and causing the errors and loss of alignment. Perhaps they need a small heatsink because of the relatively small size of the copper planes decreasing heat dissipation.
One day our flies will drown out the sun in an autonomous Skynet of whirring motors and blinking lights.

codeman
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Re: roll pitch yaw calibration

Post by codeman » Sat Mar 07, 2015 9:52 am

poizone wrote:This looks similar to a few crazy values people have been posting that end up being IMU issues. Have you crashed much since you got it? Also, is there any drift other than yaw drift?

I also have to wonder if the IMU is getting a bit hot and causing the errors and loss of alignment. Perhaps they need a small heatsink because of the relatively small size of the copper planes decreasing heat dissipation.
I fly it indoor only. Moreover, I'm using the propeller guard. If at all it drops while flying, it falls on the carpet. Yes, it shows big drift in roll and pitch. Something like -59.
I received it 4 days back, I though I would play during the weekend and bought a PS3 WL controller but I'm hardly able to fly it. just after a few seconds of flight after resetting, the gyros get crazy.

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