Date: December 13, 2004
Subject : picomotor paddle

The picomotor paddle does not have a good zero point.
Here are the reverse engineering the paddle
The slider is a 100K ohm linear pot, 
It is ballanced with a 200+ ohm resistive circuit

The three channels are similar.
We can re-do the control with rotating pots or with
push button switches - Fast+ slow+ slow- fast-
I don't know how big the dead band should be but this type of box should
not be hard to make - if we want it.
How slow and how fast do we want to go if we have buttons?

Date: December 3, 2004
Subject: Operation note

The long delays have a laser does not enter at exactly the right height.
It appears that it should be a little higher.
To fix this the laser, the pointing mirror, the interferometer, 
the receiver and the lens should all be raised slightly which would
take the system offline for a couple of days.
As a temporary fix we can reain the injection mirror.
I found that, with an allen key in the vertical adjustment screw:
7 o'clock is correct for home
6 o'clock is good for 0 to 21 meters
5 o'clock is good for 20 to 25 meters
4 o'clock is good for 21 to 28 meters

As an indicator - at home you should adjust the return spot down
until the signal begins to drop.
You should repeat this when the cart is between 20 and 25 meters
if you wish to go beyond 25 meters.

Date: October 25, 2004
From: Marc Lacasse
Subject: operation notes

A few comments on operation
Cycling power
A)  The Lincoln Lab Star Tracker is currently operating at a lower
temperature.  In order to do this we need to circulate cold water through
a fixture at the back of the cold finger.
The switch above the control console controls power ti multiple items
on the star tracker - The electronics, the TE Cooler, the Water chiller.

The compressor on the water chiller does not like to have power cycled
quickly so I suggest that the power Star tracker be turned off at the
Power Supply above the Star Tracker CCD unit.

B) It appears that the VME system does not always reinitialize
properly when the power is cycled.  I suspect that the reason may
be that some power comes in through the Star Tracker and the
Picnic camera if these items are left on.  I propose that these
electronics be turned off whenever the power to the VME is turned off.

This got the system back operating at least one time when repeated cycling
of the VME power would not clear the state of the electronics.

If you do a reboot and have to correct the file system 
Answering yes to all questions about block is accomplished by starting with 

fsck -y /dev/dsk/c1t?d0s?

With the appropriate numbers in for the "?"

The disk partitions are (as of October 2004)
/dev/dsk/c1t1d0s3    6193583 3102625 3029023    51%    /usr/local
/dev/dsk/c1t2d0s2    35009161 21672732 12986338    63%    /home/iota16/d1
/dev/dsk/c1t1d0s4    10323610 8133763 2086611    80%    /home/iota16/u1
/dev/dsk/c1t1d0s5    5883722 3393174 2431711    59%    /home/iota16/u2
/dev/dsk/c1t1d0s6    5895278      34 5836292     1%    /home/iota16/u3

Next error- 11/2/2004
Observers tried to find fringes before the delay line was tracking
fringes.  There was a crash and part of the tornado target server
and registry were corrupted.  
doing launch & gives a window with only 2  PPC's
vxworks-start or daq-start both generate a
wtx error registry not found

Note from Gary on the fix:

  To fix your tornado windshell problem (you could windsh to iota-ppc1
and iota-ppc2, but not iota-ppc0), I killed off the 3 target servers
and the registry server, and then restarted them.

  To kill off the target servers, find the tornado processes running
tgtsvr.ex (there should be 3, one for each ppc) and use kill -9 PID.
to find the process type in 
ps -aef | grep svr

For the registry server, find the tornado process running wtxregd.ex
and use kill -9 PID.
to find the process type in
ps -aef | grep regd

  To then start the registry server and target servers, just run

(Probably needs to be done as root)