As far as i know, Skyward Sword uses the WM+ and the IR sensor at the same time. But since it doesn't give you any indication if you are pointing at the screen, it relies on the WM+ only most of the time, since you won't point it correctly at the sensor bar. I think the WM+ sensor doesn't "sense" the 3D position and vector of the wiimote, more like changing that direction, detecting rotation direction and speed on one of the 3 axises. This would be why it needs recalibration all the time, but if it can see the IR sensor bar, it can recalibrate itself constantly, without the manual calibration.
Well, that's just how i think it works, i'm likely to be wrong. Anyways, if your got a good sensor bar(bright LEDs, no broken ones) and the Wiimote is facing the sensor bar in the your "middle" position, you should have less problems.
Well, that's just how i think it works, i'm likely to be wrong. Anyways, if your got a good sensor bar(bright LEDs, no broken ones) and the Wiimote is facing the sensor bar in the your "middle" position, you should have less problems.