When trying to move the B1p QD1 112MHz centering actuator from the
quadrant galvo to the SDB1 bench after a minute or two the BS
alignment start diverging. I don't understand why. It doesn't seem to
have been a problem during the test in July:
https://logbook.virgo-gw.eu/virgo/?r=67410

Either the problem is new, I don't remember a change needed to make it
work in July, or it wasn't a problem because I did not stay long
enough in DRMI and moved on with the lock acquisition where the BS
drift control is disabled. The last explanation is the most likely as
doing the swap just before leaving DRMI 3F worked and the lock
acquistion continued to CARM NULL 1F.

But before arriving that I have made many trials, and ended up
increasing the H gain of B1p 112MHz for SDB1 control by a factor 4,
and the V gain by a factor 6.

Changing B1p QD1 alignment with picomotors so zero of 112MHz error signal
matches good alignment of SDB1 in CARM NULL 1F.

B1p_M2_H -400 steps
B1p_M2_V +700 steps

After that the lock acquisition could continue to LN3 without problems
(with the usual SR TY +2 urad before locking the OMC).

Once in LN2 there is the issue that DARM drift control moves the beam
away from the center of B1p QD1. As the low frequency control becomes
the OMC alignment, and no longer the B1p 112MHz quadrant signal. Some
solution may be needed for that if it proves to be a problem. For
example turn on the B1p galvo with very low gain to remove that
offset.

Commented out the enable of SDB1 drift control in
LOCKED_DRMI_3F_ASC_FULL of DRMI_LOCK

Put it instead in SETTING_CARM_OFFSET_MID of ITF_LOCK along with
disabling the B1p QD1 galvo

17:46 UTC Unlocked on purpose and reloaded DRMI_LOCK and ITF_LOCK to
see if automating this procedure works.

Relock to CARM NULL 1F was successful at first attempt

Added to automation offsets into the B1p QD1 galvo correction, as a
simple correction to keep the quadrant centered when the OMC drift
control is enabled. In the future it will need to be replaced by some
slow loop to keep the quadrant centered.

Unlocked when trying to stop the automation to correct a type before
reaching LOW NOISE 2.

Unlocked when trying to adjust the galvo correction offset in LN2 too
fast, as the OMC drift control was not compensating for it.

Put a value of 2.5 in horizontal in the automation and increased ramp
time to 300 seconds. Also added a reset to zero in the DOWN state, but
haven't checked that it works. Probably a larger offset is actually
needed to have the quadrant centered, and some offset on the vertical
direction too.

Note that after DRMI 3F it is now normal that the B1p QD1 galvo loop
is open. I have adjusted the DMS flag accordingly