Date: Sun, 15 Aug 2010 20:18:36 -0000 (UTC)
Subject: Re: 2.5m obslog 20100814 (MJD 55423)
From: hjbrew@apo.nmsu.edu
I stayed beyond my shift to help fix the alt slip problems from last
night.  French talked me through it via telephone.  By his instructions, I
increased the pre-load between the alt capstans and alt drive surfaces.
It was moved from 2.25 inches to 2.5 inches, which increase the load by
500 lbs according to French.  I did a careful top/bottom balance for the
alt axis and slew the scope from 90 degree to 6 degrees several times; all
seemed  well.  While stopped at six degrees alt, however, the scope still
slip when I did an axis init.  SO, I LEFT THE ALT_SLIP DETECTOR BYPASSED
per Dan Long's instructions from last night.  We can get through the night
in the state, but this problem may need some additional attention
tomorrow.  Please feel free to contact me if you have questions.  I
preparing to drive home now.
H
>
> ---=== OBSERVING SUMMARY ===---
>
> During afternoon preparation we got a some times Alt breaking, so Howard
> turned off Alt1 interlock.
>
> Howard cleaning Alt and Az axis before pointing model.
>
> Both axis stopped many times during the night.