[Astro-mdm-report] MDM 2.4m Observing Report for 2025 Mar 28

[Galayda Eric]

Drive train was seized.  Pulled apart RA drive system and found a bolt on one of the pulleys had walked out, causing the pulley to seize on a cross support.  Tightened up and reassembled.  Tested and all seems well.

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ERIC GALAYDA 
Site Manager
MDM Observatory
950 N. Cherry Ave.          Ph. 520.318.8660
Tucson, AZ 85719           email: egalayda at umich.edu      
https://urldefense.com/v3/__http://mdm.kpno.noirlab.edu__;!!KGKeukY!x_ri3BGEXRALbdbQX8plyLaNRERZy5vdtPMWAS43ZddTEaFl9VAiqWkdBJ7JWnLy3Yp4w_ivOjkq_RVeAFZ4gUdGWphaIT0$ 
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> On Mar 28, 2025, at 10:43 PM, obs24m--- via ASTRO-mdm-report <astro-mdm-report at lists.osu.edu> wrote:
> 
> MDM Observatory 2.4m Telescope Observing Report for 2025 Mar 28
> 
> Observer(s): Laura Hunter, Sasha Campana
> Institution(s): Dartmouth
> 
> Instrument: OSMOS
> 
> Worked for 1 hours (first half of the night)
> Conditions were Overcast most of the night.
> Problems were encountered, see the separate trouble report for details.
> 
> Seeing and Weather:
>   Beg: Seeing 1.4 arcsec, Overcast, Winds High
>   Mid: Overcast, Winds Calm
>   End: Overcast, Winds Calm
> 
> Observing Summary:
> 
> Tried to take spectra of low-surface brightness galaxies.  
> Bad weather caused significant guiding and set-up issues.
> 
> Trouble:  Around 9:00 PM AZT issues with slewing happened.  
> The telescope did not complete slew and we had to stop and re-try slew to got to target. 
> About 30 minutes later a similar issue happened.  We began slew to new target at same time as stopping guiding.  
> The telescope slewed in Dec but not RA.  Stopped slew and re-tried with the same result and the telescope stopped moving in RA.
> The telescope is locked at HA -02:20
> Tried resetting the sidereal rate and nothing happened.
> Tried sending telescope to zenith and could only move in Declination.
> Tried using hand paddle to move telescope and it would only move North South, not East West.
> Tried restarting FCS and nothing resolved.
> Shut the mirror covers and shut down dome for the night.
> 
> ------------------------------
> 
> Submitted on 2025 Mar 28 [22:43:08]
> 
> Observer Contact Email: laura.c.hunter at dartmouth.edu (Note: will not appear in versions of the report archived online)
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