Discussions

Many thanks in advance for any suggestion and experience first.

Need help on the following two issues:

1. Can someone confirm with me the directions definition of ArduIMU Ver2? Accroding to the mark at the bottom, the ArduIMU Ver2 follows right-hand rule. However, suprisingly, when I do the test, I found that all the definitions are opposite (i.e., from the top view, backward and left are positive. for z direction, up is position). Furthermore, when I check the eagle file, I found two set of direction definitions marked.

2. I intentionally put the IMU with a phical roll angle of 90-degee and power it on. I expect to read a close-to-g value along y directions. However, it turns out the reading is still:

    x -- near to 0;

    y -- near to 0;

    z -- near to g.

    Can someone explain it briefly to me?

Again, many thanks for helping me out.

Alex