[RASMB] XL-I start problem

[John Philo]

All, an "unnamed source" tells me that the same 'dope slap' effect can be
achieved more quickly and easily by momentarily unplugging a white jumper
with a small loop of wire located on the back of the centrifuge next to the
serial cable, which will cause a drive diagnostic.
 
Wouldn't it be great if that would work for politicians who deny climate
change?
 
John
---------------------------------
Alvaro,
 
I'm not sure this is your problem, but once a year or so my instruments get
into a state I call 'brain fever' where the main centrifuge computer is
confused about whether the rotor is spinning and just refuses to run. The
only cure I know for this doesn't make a lot of sense, and I discovered it
by accident, but it works nonetheless, so give this a try: 
 
(1) First you need to release the vacuum and open the door (sometimes it is
so confused it won't release the vacuum, so I have to power down and do the
emergency vacuum release).
 
(2) Set a non-zero rotor speed from the instrument panel. Then with the door
open press the Start button on the panel. This will cause the CPU to throw a
diagnostic and the printer will print. This seems to be for the instrument
something like a slap in the face, and just as that does when someone gets
hysterical in the movies, magically it gets things all straightened out.
 
Good luck,
 
John
  _____  

From: rasmb-bounces at rasmb.bbri.org [mailto:rasmb-bounces at rasmb.bbri.org] On
Behalf Of Alvaro Ortega Retuerta
Sent: Tuesday, February 07, 2012 9:55 AM
To: rasmb at rasmb.bbri.org
Subject: [RASMB] XL-I start problem


Dear all, 

I am using an XL-I which so far never showed any problem regarding
communication with the computer or any other issue. Perhaps my problem has a
trivial solution and that is why I ask for your experience before contacting
the Beckman service.

The problem is simply that the XL-I won't start. When the experiment is
setup in the Proteomelab software, hitting the Start single scan or Start
method scan will open the new window which just states "Waiting for speed".
The vacuum is at 0 microns, and even when set at 3000 rpm, hitting the green
start button in the XL-I console, or through the proteomelab software (Start
XL-I), it stays at 0 rpm. 

There is no message of communication failure or anything. Has anybody had
this problem before? Or does anyone knows what would be the origin of this?
Perhaps it is a simple thing that I didn't realise. 

Any comment, or advice, or hint that could help me find the way to make it
run again would be very appreciated.

Thank you very much for your help
-- 


_______________________

Álvaro Ortega Retuerta
Grupo Macromoléculas 
Dpto. Química-Física 
Facultad de Química 
UNIVERSIDAD DE MURCIA 
 <mailto:alvarort at um.es> alvarort at um.es 
Telf. (+34) 868 88 7420 
Fax (+34) 868 88 4148 
_______________________ 


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