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Allignment and cogging tests example mixes up electrical angle and real angle #156

@dreusel

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@dreusel

I might be mistaken, but I think there is a mix-up of electrical angle and shaft angle in the Aligment and Cogging test example. Ever since I have been trying to use this test I've had the issue that I'm getting a huge error, which is growing more over every step of the test. Looking at the code in the example, we see:

    float electricAngle = (float) direction * i * motor.pole_pairs * shaft_rotation / sample_count;
    // move and wait
    motor.move(electricAngle * PI / 180);

However I think motor.move() expects the shaft angle. Also when I run the example my shaft rotates 14 turns (my number of poles) instead of 2 as it reads from the code it should.

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