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+ Rotate the SRM tower to get the SRMI fringes on the AS CCD camera.
=> This is because the required amount of the YAW correction on SRM is currently beyond the range of the DC bias.
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Kiwamu aligned things for me, and I rotated the SRM tower so that the reflected beam was pretty much totally overlapping the incident beam. The SRC was aligned to make sure things were good. Now the DC bias for SRM Yaw is ~1.4, so we're totally good.
To rotate SRM, Jamie had the idea of using 2 screws so I could push the tower on one side, and back off the screw an equal amount on the other side and push the tower to be touching both screws again, to ensure that I was rotating about the center of the tower and wasn't introducing any Pos action.
While I was at it, I also moved the OSEM connector tower back to its normal place on the table, so it's not in the way of oplev beams. It had been moved previously to accommodate ITMY near the door. |