# RB5 High Accelerometer Bias Fail

Source: https://forum.modalai.com/topic/3214/rb5-high-accelerometer-bias-fail
Category: Development Drones (https://forum.modalai.com/category/44/development-drones)
Tags: rb5
Posted: 2024-03-13 21:26:22 UTC by vjuliani
Replies: 3 · Views: 1073

## vjuliani · 2024-03-13 21:26:22 UTC

Re: [Calibrate IMU RB5](/topic/3148/calibrate-imu-rb5)

Hi,

We have a RB5 drone and its voxl-version is:
![voxlversion.png](https://forum.modalai.com/assets/uploads/files/1710365124670-voxlversion.png) 

We didn't upgrade the build yet.

In relation to the problem, we did some flights and experienced it again.

Below are the flight logs, you can use: https://logs.px4.io/upload to visualize them.:

https://www.mediafire.com/folder/74yd2f8tdnjqq/RB5_flight_logs

In the flight with problem, we performed sensors calibrations using QGC.

The flight with no problem happened a couple of hours after the first flight with problem and no calibration was performed.

Can you find any indicators of the problem in the logs, such as high temperature, for example?

## Reply by Moderator (ModalAI staff) · 2024-03-14 04:05:39 UTC

@vjuliani That software is really old, it will probably help to upgrade to something more recent: https://docs.modalai.com/Qualcomm-Flight-RB5-voxl-sdk-upgrade-guide/

## Reply by vjuliani · 2024-03-14 11:36:55 UTC (in reply to Moderator)

@Moderator, thanks for your reply.

The px4 version is v1.12.31 (beta)

Do I need to upgrade it too?

Does the SDK upgrade process update px4 automatically?

## Reply by Moderator (ModalAI staff) · 2024-03-14 16:35:08 UTC (in reply to vjuliani)

@vjuliani yes, it will update everything