MDM Trouble Report for 2015 Mar 12

Telescope: 2.4m
Observer(s): Wagner (OSU)
Instrument: OSMOS

Problem(s) Encountered:
1. Dome encoder is not working properly.  Does not respond to TCS enabled
slews.  Azimuth does not update through the computer.  Dome error advances
slowly even with the dome sitting in a parked position.  Operated manually for
the remainder of the night.

2. The telescope focus was found to be way off from previous nights even though
the focus encoder reported the same value used the previous 3 nights.  Best
focus before was 2660 but tonight that same value gave a big donut on the image.
After resetting the focus encoder by moving to the full-out position and setting to
0.0, we found the best focus at 1650 instead.  At the out limit, the focus encoder
reported a value of 455.

3. During the TCS restart to resolve the dome encoder issue, the telescope moved
on its own to the south in declination.  I hit the emergency stop button in the dome
to halt the slew.  Manual slew was required to put the telescope back to the
stow position.  Apart from the focus and dome encoder issues, the telescope
came back up properly.

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Submitted on 2015 Mar 13 [3:56:44]