IMU Calibration Problem

[pdmike]

Little problem calibrating my IMU. Phantom 4. I got to the screen where you hit Calibrate. I put the quad down on a perfectly flat surface and hit "Calibrate." I was going fine until it got almost to the end, and then it just sat there. It never finished. I turned everything off and then on again and tried it again. When I hit calibrate, it went right back to the point where the green line was almost to the end and just sat there.

Is that all there is? Isn't it supposed to finish calibrating?

 

[Rick M]

I haven't done mine in a couple of months, so I can't recall. However, when you restart the quad and go into the "sensors" in the Go 4 app, does it show them as calibrated (low bias/reading in green)? If so, I would trust the calibration. Maybe a short test flight to confirm, but I wouldn't worry if the readings showed good.

 

[pdmike]

I haven't done mine in a couple of months, so I can't recall. However, when you restart the quad and go into the "sensors" in the Go 4 app, does it show them as calibrated (low bias/reading in green)? If so, I would trust the calibration. Maybe a short test flight to confirm, but I wouldn't worry if the readings showed good.

The readings showed good, so I figured that was good enough and flew it. Did fine.

 

[pdmike]

For anyone else who might be having a problem understanding how to calibrate the Phantom 4 IMU, here's the answer:

.
You have to physically move the quad during the IMU calibration process to the various positions as illustrated on the screen. I was thrown off by a video I saw where the video guy said, "During the calibration process, do not touch the quad; don't move it in any way, don't even walk near it." Right.

 

[Rick M]

For anyone else who might be having a problem understanding how to calibrate the Phantom 4 IMU, here's the answer:

.
You have to physically move the quad during the IMU calibration process to the various positions as illustrated on the screen. I was thrown off by a video I saw where the video guy said, "During the calibration process, do not touch the quad; don't move it in any way, don't even walk near it." Right.

Earlier firmware versions had a different calibration process that didn't involve moving the quad at all, so his video was correct when he made it.

 

[RENOV8R]

I only calibrate IMU if I get a popup telling me it's required

 

[Rick M]

I only calibrate IMU if I get a popup telling me it's required

Same here. There's no downside to doing it more often, but as long as you're doing a check pre-flight and it looks good, no real reason to re-calibrate.

 

[LoneRCRanger]

My IMU is rhetorical considering that I don't know what an IMU is anyways...

 

[RENOV8R]

IMU = inertial measurement unit. This is the unit that processes all the info of where your quad is and what it's doing and what it's doing and sends that info to the gyros, accelerometers etc. Basically it's the "brain" of your flight controller

 

[LoneRCRanger]

Thank you!