[Takahashi, Sato, Ikeda]

1. Measured the relation between number of steps in the stpper motor for FR and the keystone height again.
   • BF: The keystone height was saturated at 67mm (7000count).
   • F0: Mid point is -18mm (2000count). The movable range may be -16~-20mm.
2. Tried to move the FR for F3 using a script to make impact, but the FR did not move.
3. Checked the assembly situation in the FR for F0. The present F3 type blades can be replaced to the F2 type blades.

[Takahashi, Sato]

1. Checked the BF. The primary coil was touching to the secondary coil.Shifted the secondary coil. The behavior of BF became natural.
2. Replaced the blades of FR in the F0 from the BF type + old BF type x2 to the F2 type x2.
3. The height of F0 keystone was set to -19mm with the ballast (25 +5x5 +1.8 = 51.8kg).
4. Measured the rage of FR again (plot). It can move the keystone by +/- 4mm.
5. Tried to move the FR in F3 using the stand alone driver. It didn't work. We found the one side of coil in the stepper motor was grounded; 18Ω bw #1-6pin, 1.9Ω bw #1pin-chamber, 17.6Ω bw #6pin-chamber.

[Takahashi, Sato, Ikeda]

Measured the relation between number of steps in the stpper motor for FR and the keystone height again. The keystone height of BF was saturated at 6500count smaller than previous measurement. We adjusted the position of the secondary coil again. The recovered height (7100count) was limited by the mechanical stop (see picture).

All models of k1ix1 suddenly died while driving F1 GAS-Stepper motor of ITMX.

I learned from yamamoto-san and used the following command to restore all models including the iop server.
/opt/rtcds/userapps/release/cds/common/scripts/restart_iop_model.sh

The current value is currently running at 26A/30A, and there is a possibility that the upper limit has been exceeded by driving Stepper.
If the problem occurs frequently, it is necessary to strengthen the power supply.

[Takahashi, Sato, Ikeda + Tomaru, Ushiba]

We set the height of ITMX for some kinds of situations.

1. In-air: Set the height of keystone to +2mm for F0, +1.5mm for F1, +0.5mm for BF respectively. The height of BF was 76/78/78.5mm. Then measured height of the TM was +2mm from the optical axis.
2. Cryogenic: Set the height of keystone to -3.5mm for F0, -0.5mm for F1, +/-0mm for BF respectively. The heigh of BF was 65.5/67/67mm. Additionally the height of F0 keystone went down to -5.5mm with small ballast. Then measured heigh of the TM was -11.5mm from the optical axis.
3. Preparation for piston adjustment: Set the height of keystone to -3.5mm for F0, -0.5mm for F1, +1.5mm for BF respectively.

(Log on 16th)

[Takahashi, Sato, Ikeda]

The adjustment of height with pistons was canceled. The BS FR has reached the upper limit (picture). The keystone height of BF was set to +/-0mm.

[Takahashi, Sato, Ikeda, Sugiyama]

• To start rough alignment of the payload, additional ballast on the F0 was removed. The height of F0 keystone was set to +3.0mm.
• The motion of picomotor in the BF was confirmed with a fiber scope.

[Takahashi, Ikeda]

1. Cheked the height of TM. It was -0.5mm from the beam axis.
2. The height of IP base went down by 2.5mm with pistons.
3. Adjusted the height of each filter with the FR stepper motors. To move the FR for F3, the stand alone driver was used.
4. During the adjustment, the primary coil of BF damper (vertical) touched the secondary coil.
5. Removed the secondary coils temporally.
6. The height of F1 keystone has been limited by the FR. The range was 66.5+/-1mm.
7. Table shows the setup in three times today. The final TM height may be zero.