Date: Sun, 10 Oct 2010 15:16:35 -0600
From: Dan Long
Subject: Re: 2.5m obslog 20101009 (MJD 55479)
>                        APACHE POINT OBSERVATORY SDSS 2.5M
>
>                                  OBSERVING LOG
>                            Saturday October  9, 2010
>
>                                   (MJD 55479)
>
>---=== OBSERVING TEAM ===---
>
>Viktor Malanushenko
>Dmitry Bizyaev
>
>---=== OBSERVING PLAN ===---
>
>BOSS Science for the whole night
>
>
>
>
>---=== OBSERVING SUMMARY ===---
>
>
>Partly clear and dark BOSS science night with good seeing. Clouds
>after ~ 6:30Z.
>
>BOSS cartridges used:
>10 (4317) - not yet done
>11 (4197) - DONE
>13 (4218) - DONE
>14 (4236) - DONE
>16 (4257) - not done yet
>17 (3670) - not done yet
>Please check guide fiber #11 in cartridge 17 - looks like it fell off.
>
>Scissors lift in the cartridge bay can be operated only in the manual mode.
>
    On site personnel with remote help from Wendell took a look at the
scissor lift.  None of the light curtain LEDs are registering.  This
either means none of the sensors are completing the path, or possibly
that the door sensor switch is not indicating the door is all the way
up.
    Power cycling the system and small mirror adjustments didn't
change the situation.  Since the problem has been intermittent (today
was the first time it didn't operate normally during the day) it
wouldn't be expected that all sensors are not registering (it only
takes one not making the circuit to stop motion), so it is not clear
that it is an adjustment issue.
    Unless it comes back again on its own, it will need to be run in
manual mode tonight.  More detailed investigation tomorrow.
				Cheers,
				  Dan