Jennie W, Sheila, Jenne

We did steps of 1 up in PITCH for camera offset servo 2 which controls the beam spot on ETMX by moving ITMX and ETMX, as suggested by this overnight test Camilla  and I did.

This improved the build-ups and we went past the optimum point which we found to be CAM_PIT2_OFFSET = -173, so we set the offset to this. The optimum point is shown by the right most cursor in this image.

We did steps of 1 up in YAW for camera offset servo 3 which controls the beam spot on ETMY by moving ITMY and ETMY, as suggested by this overnight test Camilla  and I did.

This improved the build-ups and we went past the optimum point which we found to be CAM_YAW3_OFFSET = -349.5, so we set the offset to this. The optimum point is shown by the right most cursor in this image. There was confusion as the PITCH and YAW degrees are cross-coupled (this confused us as one must wait for the pitch servo to converge while changing the yaw degree of freedom).

We then tried to optimise our last DOF for the camera servos: PITCH for servo 3. We first moved the offset up and then down, but made the build-ups worse each time. By this point we had increased thje gain of the camera servo filter banks by 2 to speed up the converging. CAM_PIT3_OFFSET should be set to its nominal at -230 counts.

Then we ran the A2L gain scripts we used the other day successfully to optimise thse loops to match the new arm alignment. During running of this script we lost lock, not sure why.

We did not add these new offsets to the guardian because of the lock loss, we will do them together with the A2L optimisation during the nest commissioning period.

The A2L script is is userapps/isc/h1/scripts and is called run_all_a2l.sh