MDM Trouble Report for 2015 Sep 22

Telescope: 1.3m
Observer(s): Edmund Hodges-Kluck, Vivienne Baldassare, Adi Foord (Michigan )
Instrument: Templeton

Problem(s) Encountered:
There was lightning earlier in the day so we followed the
lightning shutdown procedures. When we restarted the telescope
to try and observe, the telescope would not slew and would
turn tracking off after it failed. When we tried to home the HA
and Dec axes, the HA worked but the Dec failed. We found a record
of a similar problem in 

http://mdm.kpno.noao.edu/index/Solutions/Entries/2015/3/26_Entry_1.html

and basically followed their procedure. The declination motor
in the telescope housing said 'Err', so we cycled the power
using the knife switch, and it returned to 'r 0'. We then
did 'telescope stop' and 'telescope start' and re-initialized
the TCS GUI and the MIS. This solved the problem, although the 
telescope's tilt sensors were not consistent with it being at
zenith. However, after pointing at an object and moving back to
zenith, the tilt sensors had about the right numbers. Unlike
the prior trouble report, we did not need to cycle power to the
TCS itself. 

During the time the telescope would not slew, it only gave an
error that the tracking rate was not correct, and it would turn
tracking off. However, after we attempted to home the Dec axis
it continually gave an error that said the mc_dec could not be 
homed. This is how we learned the declination motor had an 
issue.



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Submitted on 2015 Sep 23 [6:13:41]