How do you determine whether to add or remove shims when correcting alignment?

When correcting alignment, understanding the numerical values obtained from measurement is crucial for determining whether to add or remove shims. A positive number indicates that the misalignment is such that the equipment is too low at that point and requires elevation to align properly. Adding shims serves to elevate the component, thereby assisting in achieving the necessary alignment.

In practical terms, if your measurement indicates a positive value for a particular axis, it signifies that the equipment leans downwards or is misaligned in a way that requires raising the side you are measuring. This is why shims, which act as spacers, are added to achieve the correct level and alignment.

Thus, the choice stating that a positive number means to add shims accurately reflects the corrective action needed in the field of alignment practices.