Measurements of straightness as well as centre line relative to an absolute plumb line are made, for example, on vertical turbines and generator shafts. The program uses the self-calibrating properties that the laser transmitter (D22) achieves when indexed 180°.
Place the laser on the first side at “9 o’clock” to the shaft. Record all readings along this side of the shaft, then move the laser transmitter to the other side, “3 o’clock” (indexing), and record all points at the same levels as on the other side of the shaft. Then carry out the same for the other alignment, “12 o’clock” and “6 o’clock” to achieve shaft alignment.
