From: Jon Brinkmann
Date: Fri, 14 Jun 2002 11:34:15 -0600
Subject: Re: 2.5m obslog 20020613 (MJD 52439)
> Afternoon checkout
> ------------------
>
> Between when Lynn cleaned the drive surfaces and 5:30pm, we got more
> suicidal moths on the ALT drives. While moving the telescope to clean
> the moths off the ALT drive surfaces, the telescope aborted its motion
> due to tripping the SLIP interlock twice. I had to reset the SLIP board
> above the interlock bypass panel before I could move the telescope
> again.
Please report which slip signal(s) caused the trip.  They are indicated by the
LEDs on the front panel of the slip detection box.  The LEDs go off when the
corresponding slip interlock tripped.  Remember: ON is good;  OFF is bad.
In this case, since the ALT was being moved and the SLIP interlock is disabled,
it must have been the "ALT VEL" LED.  This means that the telescope exceeded
the altitude velocity limit of 0x960 (2400) (Are these motor tach or slip
encoder counts?).
I have seen this only when the telescope out of balance.  Was that the case
here?
Jon