[3dem] Artica/Krios question

[Charlotte Hamngren]

Hi David,

How was the "optics board degraded" issue resolved eventually? We are
experiencing the same thing here at Gothenburg University core facilities.
We will have a technician come to look at it today.

Best,
Charlotte Hamngren Blomqvist, PhD


Den tors 18 juni 2020 kl 16:21 skrev Andrea Nans <andrea.nans at gmail.com>:

> Hi David,
>
> We had this issue on our Talos Arctica and replacing optics boards did not
> fix the problem. It was finally solved by upgrading the firmware of the
> optics boards from 2.0.3 to 2.0.7. Apparently the correct firmware was
> never pushed to the boards after a prior software update.
>
> There is a coil calibration procedure that had to be re-done as well.
>
> Restarting the TEM server doesn't switch the FEG off as others have
> pointed out. However the gun lens trick mentioned by Mike Strauss doesn't
> appear to work for us after updating the microscope software to 1.15. We
> have to do a TEM server restart to reset the Falcon dose protector.
>
> Best,
>
> Andrea
> The Francis Crick Institute
>
> On Wed, Jun 17, 2020 at 10:49 PM Morgan, David Gene <dagmorga at indiana.edu>
> wrote:
>
>> Hi,
>>
>>
>>     We have a chronic problem with our Talos Artica sending out "optics
>> board degraded" error messages.  There is an easy reset for this, except
>> that at least for our system, the Falcon camera can't be used after
>> resetting the optics board unless one also does a microscope server
>> reboot.  Which my engineer says means I need to shut down and restart the
>> FEG.  So it's not an easy fix.
>>
>>
>>     This seems to happen once every few weeks, maybe once per month.
>> Except that yesterday, it happened three times within about two hours.  [I
>> reset the optics but didn't use the Falcon, for those of you wondering how
>> I could restart the FEG that quickly... ]  It didn't happen today at all,
>> so the error really seems to be happening randomly.
>>
>>
>>     My engineer says that the most likely cause of this is interruptions
>> to the chilled water supply, but I have not been able to identify any sort
>> of problem with flow, chilling, etc.  Has anyone else seen similar chronic
>> issues with this error?
>>
>>
>>     Thanks for any advice you can offer.
>>
>>
>> --
>>     politics is more difficult than physics.
>>                                              A. Einstein
>>
>>             David Gene Morgan
>>         Electron Microscopy Center
>>              047E Simon Hall
>>              IU Bloomington
>>           812 856 1457 (office)
>>           812 856 3221 (3200)
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