How is the primary unit typically positioned during alignment?

The primary unit is typically positioned during alignment according to reference lines. This practice is essential because it ensures that the machinery is aligned relative to fixed benchmarks or manufacturer specifications, which facilitate the proper functioning of the equipment. Using reference lines helps maintain the alignment precision necessary to minimize wear, vibration, and potential failure of the machinery over time. These lines may include the centerline of machines, edges, or other significant points that serve as a reliable baseline for achieving accurate equipment positioning. This method is systematic and significantly contributes to the efficiency and longevity of mechanical systems. In contrast, other approaches like focusing solely on operational speed or operator preference lack the precision needed for optimal alignment, and not having any specific guidelines can lead to misalignment and subsequent mechanical issues.