Subject: Re: [sloan-25mlog 2350] Re: 2.5m obslog 20150618 (SJD 57192)
From: Dan Long
Date: Fri, 19 Jun 2015 11:06:06 -0600
Yes.  The track command could have been issued with rotwrap=3Dneg =
instead of mid and it would have had plenty of travel.  However without =
adding smarts to the track command to determine the best wrap for each =
slew, mid is going to be the best choice most of the time.
-Dan
On Jun 19, 2015, at 9:47 AM, John K. Parejko  =
wrote:
> Thanks for the note, Dan. So, it looks like this was expected (though =
unfortunate) behavior?
>=20
> Also, responding to this one:
>=20
>>> 06:30:09  sop.gotoField cart 4, plate 8612. GSFOGTF.
>>>=20
>>> Guider failed to start after cals.
>>> 06:37:02 APO.dmbiz 122 sop e text=3D"Failed to turn guider =
decentering off."
>>> 06:37:02 APO.dmbiz 122 sop e text=3D"Failed to start the guider"
>>> 06:37:04 APO.dmbiz 122 sop f text=3D";failed to cleanup =
gotofield/start guiding"
>>> Started guider from the guider window.
>=20
> This is a known bug, with a couple of possible solutions a described =
in my last comment on the ticket: https://trac.sdss.org/ticket/2231
>=20
> John
>=20
> On 19Jun 2015, at 08:46, Dan Long  wrote:
>=20
>> Hi Gordon,
>>=20
>>  The positive position limit for the rotator in the TCC is 360 =
degrees, so unfortunately it tracked into the limit before the plate was =
finished.
>>=20
>> 		Cheers,
>>=20
>> 		   Dan
>>=20
>> On Jun 19, 2015, at 4:18 AM, gfreischlad@apo.nmsu.edu wrote:
>>=20
>>>=20
>>>                     APACHE POINT OBSERVATORY SDSS 2.5M
>>>=20
>>>                               OBSERVING LOG
>>>                        Thursday June 18, 2015
>>>=20
>>>                                (SJD 57192)
>>>=20
>>> ----  Observing Team ----
>>>=20
>>> Dmitry Bizyaev
>>> Gordon Freischlad
>>> ...
>>> 05:53:22 .tcc 0 tcc w AxisErrCode=3DOK,OK,MaxPos; AxisNoTrack=3DFFT
>>> Axis halted in the middle of the last E(201480) when rotator was =
over
>>> 350deg and increasing. 'tcc track' started a 3min slew to unwind the =
rotator.
>>> Telescope was still exposing so the active exposures at the time are =
bad.
>>> Exp 201480 is a bad manga exposure. AB Apogee Exp 16300031-32 may =
also be
>>> compromised. =20
>=20
> --
> *************************
> John Parejko
> john.parejko@yale.edu
> http://www.astro.yale.edu/~jp727/
> 203 432-9759
> JWG 465
> Department of Physics
> Yale University
> New Haven, CT
> **************************
>=20
>=20
>=20
>=20
>=20
>=20
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