Subject: Re: [sdss3-25mlog 778] 2.5m obslog 20120828 (MJD 56168)
From: Robert Lupton the Good
Date: Wed, 29 Aug 2012 09:02:25 -0400
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> - Bypassed altitude PLC and motor interlocks. Only visual interlocks =
that were
> tripped were alt_plc_perm, alt_mtr_perm - additional logic pointed to =
imager
> saddlebags and tbars errors, obviously are obsolete and are no help. =
It was
> determined that it was not an interlock problem.
This has been fixed in the version of the interlocks that John and I =
worked on when I was at APO a couple of weeks ago. Ask him how to get =
the updated interlocks!  And the "ultimate causes" window is back (it =
was hidden, at least on my laptop)
> ** It was only after Joe did this that the telescope magically began =
to work
> again. We can speculate that the telescope centering mechanism was =
flaky and was
> allowing the telescope and the windbaffle to collide with each other, =
but
> we don't know for sure.
There are bump switches.  Were they reporting contacts?
> We checked that there was nothing jammed between the
> telescope and the wind baffle that would have been causing problems. =
More
> investigation will take place tomorrow. The magnetorestrictive sensor =
will be
> checked out.
					R
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