I am in the process of designing a shutter door and is actually finished. I stand, however, left with the problem that the door rolls up and down incorrectly. As you can see in picture 4, it looks right when it is rolled up, but on the image 3, it can be seen that the end float in the air and are not fixed to the roller, as the red lines indicate.
I used here a spiral feature to make the track where the door to run, but it has its limitations.
Does anyone have any suggestions for how I can fix this.