From: Jon Brinkmann
Date: Thu, 18 Nov 2004 17:01:20 -0700
Subject: Re: 2.5m obslog 20041116 (MJD 53326)
We looked at the murmur log for the sequence of commands to the sp1
specMech controller frr the wierdness during the afternoon
collimation.  It is evident that Mike's SOP session sent a command,
without him commanding it to, to move sp1's actuator C by 7640 steps
(seven 1000 step moves and one 640 step move).  There is no
corresponding "mechMove" or "mechPiston" recorded from his session in
the log.  FYI, the time stamp for this oddity is "2004-11-17 00:44:40Z".
Dan, Pete, Mike, Jurek and Jon talked about possible causes.  They
thought it was perhaps due to the TCL "hit return on a blank line" bug
that has bitten in the past.
As an aside, there was an occurance prior to this of the specMech
processor returning a transient zero position for the C actuator, but
it occured only once in passing and did not contribute to these
collimation problems.
Jon