Figure 3.71 Coning principle 1. The center of the circle is the rotational center of the shaft.
![](https://cdn.bfldr.com/Q3Z2TZY7/at/xtmp67c5njsbpmsw3wcjrj/Reliability-_resources_-_blog_-Twin-laser-1-300x183-1.jpg?auto=webp&format=jpg&auto=webp&width=800)
Figure 3.72 Coning principle 2. The axis of rotation is made into a single point at a distance from the shaft end.
![](https://cdn.bfldr.com/Q3Z2TZY7/at/fz386wcshvp29sk27qs95nk/Reliability-_resources_-_blog_-Twin-laser-2-300x125-1.jpg?auto=webp&format=jpg&auto=webp&width=800)
Figure 3.73 Reverse-Rim dial indicator method. Measurement of stationary side offset, DIS.
![](https://cdn.bfldr.com/Q3Z2TZY7/at/hkrqh6nsn37ngsnxsjcc2c8t/Reliability-_resources_-_blog_-Twin-laser-3-300x221-1.jpg?auto=webp&format=jpg&auto=webp&width=800)
Figure 3.74 Twin laser method. Measurement of stationary side offset, TD-S
![](https://cdn.bfldr.com/Q3Z2TZY7/at/pn89rgcpv9k7ftq6hwgk7s/Reliability-_resources_-_blog_-Twin-laser-4-300x206-1.jpg?auto=webp&format=jpg&auto=webp&width=800)
Figure 3.75 Reverse-Rim method. Measurement of movable side offset, DIM
![](https://cdn.bfldr.com/Q3Z2TZY7/at/t7bn8ftmmt5h69wzq6bpm/Reliability-_resources_-_blog_-Twin-laser-5-300x221-1.jpg?auto=webp&format=jpg&auto=webp&width=800)
Figure 3.76 Twin laser method. Measurement of movable side offset, TD-M.
![](https://cdn.bfldr.com/Q3Z2TZY7/at/9j69cc7665f396n82wxtxr8/Reliability-_resources_-_blog_-Twin-laser-6-300x221-1-1.jpg?auto=webp&format=jpg&auto=webp&width=800)
(real time)Figure 3.77 Equations
![](https://cdn.bfldr.com/Q3Z2TZY7/at/9j69cc7665f396n82wxtxr8/Reliability-_resources_-_blog_-Twin-laser-6-300x221-1-1.jpg?auto=webp&format=jpg&auto=webp&width=800)
Figure 3.78 Example, feet calculation.
![](https://cdn.bfldr.com/Q3Z2TZY7/at/cmrvpfb6gvv26nmtgmtj5rm/Reliability-_resources_-_blog_-_Reliability-_resources_-_blog_-Twin-laser-8-300x220-1.jpg?auto=webp&format=jpg&auto=webp&width=800)