Today, when I align filter cavity, I found the output of Input pitch is very large. As shown in the first attached figure, the H3 coil has an output of 30,000. This is reaching the maximum of coil.
So I tried to offload this value with picomotor. However, there is an error coming out when I use labview to move picomotor. The error is shown in the attached figure 1. To fix this problem, I did following check:
However, the picomotor still didn't work. I have already sent Takahashi-san an email to ask how to solve this problem.
The problem is solved by using directly a long ethernet cable between computer and picomotor box.