The ITMY mirror was released. The OSEM readouts became healthy.
To see what is going on, I changed the PIT DC bias slider on ITMY from 0.8 to -1 or so, and then the optic started showing a free swinging behavior.
If there were no responses to the DC bias, I was going to let people to open the chamber to look at it closer, but fortunately it released the optic.
Then I brought the slider back to 0.8, and it looked still free swinging. Possibly the optic had been stacked on some of the OSEMS as Jamie expected.
ITMY, which is supposed to be fully free-swinging at the moment, is displaying the tell-tale signs of being stuck to one of it's OSEMs.
Do we have a procedure for remotely getting it unstuck? If not, we need to open up ITMYC and unstick it before we pump.