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

We tried to recover the F1, F2 FRs.

• Checked cable connection for the F1 FR. Pin #1 was grounded. We prepared for the stand alone driver and connected it to the F1 stteper motor through a #1-6 flip cable. Though we tried to move the stepper moter using some step methods, the FR didn't work.
• Tried to move the F2 FR again. We used the slow micro steps and the intermittent full steps. The FR came back alive! Set the keystone height to the mid point.

We tuned the IP more.

• Added a ballast ring (t=6mm, 2.7kg).
• Measured the TF (ACT-L to LVDT-L). Resonant frequency became lower than 50mHz.