Date: Mon, 11 Oct 2010 14:05:42 -0000 (UTC)
Subject: Scissor Lift - Now Working in Auto
From: "Garrett Ebelke"
Hey all,
We got the scissor lift fixed in a few minutes this morning. The mirrors
were really out of adjustment, but Tracy brought in a laser pointer and we
were able to get the mirrors close to center, then used the LED's inside
the junction box to tell us when we got it aligned. Took a few minutes of
adjusting because if you touched it, it would be perfectly aligned but
then pull away and it goes out of alignment. We'll keep an eye on it today
for any other malfunctions, hopefully it was just the mirrors.
-Garrett, Tracy
>>                        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
>
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