[Astro-mdm-trouble] MDM Trouble Report for 2020 Feb 19

[John.R.Thorstensen at Dartmouth.edu]

It may be that each axis has its own fuse?

John

On Thu, 20 Feb 2020, Jules Paul Halpern wrote:

> Yet the telescope did move very far, at least in one axis.
> 
> Jules
> 
> On Thu, Feb 20, 2020 at 3:10 PM John.R.Thorstensen--- via ASTRO-mdm-trouble
> <astro-mdm-trouble at lists.osu.edu> wrote:
>
>       Ah.  Probably a consequence of trying to move with the
>       brakes on.  I blew the windshield-wiper fuse on an
>       old Datsun once by hitting the wiper switch when they
>       were frozen solid in ice.  As an old upstate New Yorker
>       I'm sure you remember what that's like!
>
>       John
>
>       On Thu, 20 Feb 2020, Galayda Eric via ASTRO-mdm-trouble wrote:
>
>       > Blown drive fuse.  Replaced and all seems ok.
>       > ****************************************************** 
>       > ERIC GALAYDA 
>       > Site Manager
>       > MDM Observatory
>       > 950 N. Cherry Ave. Ph. 520.318.8660/1 
>       > Tucson, AZ 85719 email: egalayda at umich.edu  
>       > http://mdm.kpno.noao.edu
>       > ******************************************************
>       >
>       >       On Feb 20, 2020, at 4:42 AM, obs24m--- via
>       ASTRO-mdm-trouble
>       >       <astro-mdm-trouble at lists.osu.edu> wrote:
>       >
>       > MDM Trouble Report for 2020 Feb 19
>       >
>       > Telescope: 2.4m
>       > Observer(s): David Schiminovich, Nicole Melso (Columbia
>       University)
>       > Instrument: CHaS
>       >
>       > Problem(s) Encountered:
>       > When we began astronomical observations, we slewed to the
>       nearest
>       > bright star and noticed that it had not been acquired.
>       >
>       > After trying a few commanded slews to other positions near the
>       zenith,
>       > we
>       > noticed that the brake was engaged, and was a likely culprit
>       for our
>       > pointing issues.
>       >
>       > Among the problems we had noticed was that slews were not
>       being
>       > properly completed (as one might expect, given that the brake
>       was
>       > engaged!)
>       >
>       > Since we were near zenith, we sent a command to disengage the
>       brake.
>       >
>       > At that point the telescope slewed to a position at dec +88
>       and hour
>       > angle ~2.
>       > We don't know why this occurred, as we had not entered any
>       targets
>       > with coordinates near that region.
>       >
>       > Subsequently the telescope would not respond to any commands
>       to move
>       > (slews, zenith command, paddle)
>       >
>       > We tried restarting the TCS program but also no change. 
>       Eventually we
>       > decided to end observations for the night.
>       >
>       >
>       > ------------------------------
>       >
>       > Submitted on 2020 Feb 20 [4:42:56]
>       >
>       > Observer Contact Email: ds at astro.columbia.edu
>       > (Note: thiswill not appear in versions of the trouble report
>       archived
>       > online)
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>       > ASTRO-mdm-trouble at lists.osu.edu
>       > https://lists.osu.edu/mailman/listinfo/astro-mdm-trouble
>       >
>       >
>       >
>       >
>
>       --------------------------------------------------------
>       John R. Thorstensen
>       Department of Physics and Astronomy
>       Dartmouth College
>       6127 Wilder Laboratory
>       Hanover, NH 03755
>
>       Office: 239 Wilder Hall
>       Phone:  603 646 2869     Fax: 1446   Hinman Box 6127
>       --------------------------------------------------------
>       _______________________________________________
>       ASTRO-mdm-trouble mailing list
>       ASTRO-mdm-trouble at lists.osu.edu
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> 
> 
>

--------------------------------------------------------
John R. Thorstensen
Department of Physics and Astronomy
Dartmouth College
6127 Wilder Laboratory
Hanover, NH 03755

Office: 239 Wilder Hall
Phone:  603 646 2869     Fax: 1446   Hinman Box 6127
--------------------------------------------------------