[LSM6DSL] Different accelerometer magnitude reading between +X axis and -X axis

[MKang.1]

Hi,

As stated in question, accelerometer vector magnitudes are different when sensors are oriented to +X axis and - X axis. Difference is about 5 %.

DT0105 only states about +X axis calibration. so I'm confused whether this difference comes from chip itself, or installation.

[Eleon BORLINI]

Hi @MKang.1​ , are you measuring data at application level? If so, did you check if you are fully planar with respect to x-direction (board / soldered device / etc), in order to avoid an "environmental" offset. Supposing it is an offset of any type, it is possible to compensate an unwanted offset in two different ways:

1. Writing the offset value in the X_OFS_USR (73h), Y_OFS_USR (74h), Z_OFS_USR (75h) --> see p.95 of the datasheet
2. Saving the offset at software level and subtracting it to the acquired data

Regards,

Eleon

[MKang.1]

Hi Eleon,

I understood I need to calibrate an offset. To calculate offset value, can I refer to DT0053 also for LSM6DSL?

Thanks for prompt answer.

Regards,

Kang

[Eleon BORLINI]

Yes, the mentioned design tips are generic and can be used also for LSM6DSL.

You can refer also to this community topic.

Regards

[MKang.1]

Now it seems clear. Thanks!