MDM Trouble Report for 2009 Mar 22

Telescope: 1.3m
Observer(s): Patterson/Schroeder (Columbia)
Instrument: Templeton

Problem(s) Encountered:
As reported before, declination oscillations on the order of one 
minute of arc in north/south as seen on the guider were observed again
as last night, only more dramatic, making it impossible to image early 
evening targets. Bob Barr called and recommended that we experiment to see if 
turning off the drive helped the problem or not, but by that time we were 
not able to observe due to clouds. Upon opening again, the problem did not 
manifest, perhaps due to the fact that we engaged the e-stop and then released it to
the problematic drive vibrations which Tom discovered can be stopped by applying
a little pressure to the belt in the drive box. We also note that changing the focus 
on the telescope occasionally causes a similar declination shift of about one
minute of arc.

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Submitted on 2009 Mar 22 [5:46:42]