I set up an ardustation with JR servos, installed on a home-made pan-tilt base. I set the pan servo limits to match the station gear ratio, and by using the antenna test screen I get perfect 360 deg rotation. However, when operating, I start with the antenna pointing at the plane, but when moving to the sides, the antenna deflects more than required.
At first I thought my limits were not set correctly, but I ruled that out by setting them up several times. Also, when circling the station, when I reached 360 deg, and the station had to make a full circle to 0 deg, it did so such that 0 was aligned with 360, without overlap with the other travel end. This, to my understanding, also demonstrates that the travel is set properly. Moreover, it shows that the antenna is pointing to where the station wants it to, and not someplace else due to mechanical setup.
If this is true, then the station is might actually be giving wrong commands. I realize this is unlikely, since people use this station successfully. Any idea what I should check?