What is a good rule of thumb for adjusting eccentrics that do not contact the door track?

When adjusting eccentrics that do not make contact with the door track, a sound guideline is to observe the gap between the upthrust roller and the track, ensuring that there is daylight between them. This approach is crucial because it indicates that the door is positioned correctly, allowing proper operation without excessive friction or binding. Ensuring that there is daylight allows for the necessary movement and flexibility of the door system, thereby minimizing wear on components and ensuring smooth operation.

In this context, seeing daylight means the roller isn't engaged enough with the track to cause issues, but it is positioned well enough to ensure that no misalignment occurs that might impede the door's ability to open and close smoothly. This method helps maintain a balanced interaction between components, ensuring efficient lift operation.

Other options typically focus on different aspects of door operation, which could inadvertently lead to issues with alignment or functionality if not considered within the context of maintaining proper clearance and setting operational tolerance.