When aligning machines, what is commonly checked to ensure proper adjustments?

When aligning machines, checking for bar sag is crucial because it directly impacts the alignment and operation of the machinery. Bar sag refers to the deflection or bending of drive shafts or other horizontal elements due to gravitational forces or load. If there is excessive sag, it can lead to misalignments caused by uneven loading of the bearings, which can result in increased wear, reduced efficiency, and potential failure of the equipment.

Proper alignment relies on straight lines and even force distribution; hence, ensuring that there is minimal bar sag is essential for maintaining the integrity of the alignment process. This means that careful measurements and adjustments will need to be made to address any sagging in the machinery setup before it is considered properly aligned. Addressing bar sag helps prolong equipment life and ensures optimal performance.

In contrast, while clearance levels, noise levels, and vibration patterns are also important considerations in the maintenance and operation of machinery, they do not specifically target the alignment process in the same direct way that checking bar sag does. They may indicate other issues or contribute to overall machine performance but are not the primary focus when it comes to alignment adjustments.