KAGRA Logbook

Reports 1-1 of 1

VIS (SR3)

terrence.tsang - 17:22 Friday 25 January 2019 (7812)

Reset IP stepping motor

Today

We moved the stepping motors to roughly their centre position so we could adjust it in the vaccum.

Then, we adjusted the steppers so that IP_L and IP_T are roughly zero.

current status:

IP_L: 22 µm

IP_T: -58 µm

IP_Y: -5110 µrad

stepping H1: -210000 steps

stepping H2: -990000 steps

stepping H3: -335000 steps

We did the same for SR2: 7814

Comments to this report:

enzo.tapia - 18:28 Tuesday 29 January 2019 (7852)

After I opened the loop of the BS IP, I had to adjust again the IP position using the Horizontal Stepper motors. The final position was:

IP Longitudinal: 104 µm.

IP Transverse: 538 µm.

IP Yaw: 380 µrad.

and position of the Horizontal steppers is now:

H1: -352,101 (-118,000 in screen).

H2: -345,899 (-20,000 in screen).

H3: -249,000 (31,000 in screen).

After I opened the loop of the BS IP, I had to adjust again the IP position using the Horizontal Stepper motors. The final position was:

And we did not move the steppers this time, so the position of the Horizontal steppers are the same.