A components position relative to the machine as a whole is "read" by sighting in on calibrated Scales or Targets with the Secondary Instrument. Prior to taking a reading, the Secondary Instrument is set 90 degrees to the Offset Tram Line by referencing back to the Base Instrument. Square readings can be as simple as taking one reading on the front side and another on the back, or a more complex profile can be created by taking multiple readings at increments across a surface; thus, providing a comparison of different surfaces or items throughout the machine. It is critical that the target is held level and square on the surface being read. We have a complete assortment of precision targets, including many custom holders that provide the stability to obtain accurate and repeatable readings that are essential for proper alignment. In many cases, due to visibility restrictions, our custom targets and holders give us the ability to check the alignment of an item that would otherwise be inaccessible with commercially available targets.