Last week the SQZ crew needed to adjust the pitch on ZM1 with the adjustment screw and in doing so, maxed out the adjustment and caused some rubbing. Yesterday I went in and rebalanced the optic holder on its wires to recenter the adjustment screw. I had to back out and then recenter the OSEMs to do this.

I got Terry's help to get a beam onto ZM1 and then checked that, without any damping or offsets, ZM1 was pointing through the apertures with the adjustment screw still relatively in the center of its range. I then double checked the stops were all backed off and buttoned up.

TFs look better in some ways, but still not entirely matching the other tip tilts. Yaw in particular was showing a large second feature that Jeff says is cross coupling from P or L. Now, the feature is much smaller, but still there. The resonant frequencies still seem to be a bit lower than other tip tilts, but again better than before.

Attached the TFs for both undamped (first 3 attached) and damped (last 3).