[Takahashi, Sugiyama, (remote) Sato, Ikeda]

We checked the adjustable range of each filter with the FR.

• Releation between number of steps and the keystone height is shown in the plot.
• Adjustable range is summarized in the table.
• F2 FR has been stuck at the lower side during the operation. The filter itself is still working, but the height of keyston is out of the linear range of LVDT. The ballast on the BF cup was dcreased by 180g.
• F1 FR didn't work. We will investigate more.