Absolute IMU-ACG compass problems (EV3)

Lego Hkr Member
I performed many compass calibration procedures, even followed the YouTube video exactly as shown. The end result is the following:
1. The displayed heading using the EV3 Read ABSIMU program jumps around quite a bit and doesn't seem to track turns. The heading jumps 100+ degrees, all over the place (the red side is facing up)
2. Using the EV3 Read ABSIMU program it occasionally says "Read Error A/T" and "Read Error H" and "Read Error G" at the bottom of the screen of values.
Then I would like to be sure the firmware is current (1.20) but when I try to download the Explorer program from the PC it gives this message:

Unable to compile some documents for deployment:
Read Device Info.ev3p: Use of a block which no longer exists

So there's two problems here. Would appreciate some ideas on the compass values jumping around and the error message.
Lego Hkr, 2017-08-14 17:45:42 -04:00
#848
seth10 Member Staff Member

Magnetic noise will cause disturbances in the AbsoluteIMU's readings. An EV3 motor is the most likely cause of this. What do you see if you only take a reading, with no other sensors or motors nearby and the AbsoluteIMU away from the EV3?

As for the explorer program, have you downloaded the Mindsensors I2C Address ID and Mindsensors Read 8 Bytes blocks?
seth10, 2017-08-18 11:44:19 -04:00
#850
Lego Hkr Member

I just received a replacement AbsoluteIMU and it's working perfectly. Thanks to Mindsensors for the excellent customer service!

Lego Hkr, 2017-08-29 09:17:36 -04:00
#860

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Lego Hkr Member

seth10 Member Staff Member

Lego Hkr Member