Date: Mon, 12 Jun 2023 18:28:59 +0000
Hi all,
We have 2 samplecase 60 and ran into the following problems:
Problem 1: Issue with moving the concentric circles resulting in an alignment
issue and FATAL ERROR message. This was an issue any time the Samplecase went
to the samples 49-60.
Solution 1: The sample case had to be reset (using HA or pressing emergency
stop) and then the iconNMR queue could be resumed. The more permanent solution
was to take all the samples off the sample case, remove the cover, remove the
2 small nuts and 2 large nuts. That allowed the concentric rings to drop out.
I cleaned the rings using isopropanol to remove the lithium grease that was
catching dust and making movement difficult. I used a dry WD-40
(https://www.wd40.com/products/dry-lube/ ) and greased the top and bottom of
each ring ONLY on the area that is normally covered by the case. Once I reassembled,
the rings would easily move. I tested by hanging the rings on my finger and they
would slide from the force of gravity. Before I started, they would not move at all.
I then reassembled the cover and installed. We've run ~2000 samples since and
haven't had an issue.
Problem 2: System thought the emergency button was pressed even when it wasn't
Solution 2: The DB25 cable that runs from the bottom control board (near the
samples) to the top control board ( near the shuttle) failed such that the
resistance on the pin controlling the TTL signal was megaohms. Replacing the
cable with another DB25 worked. I expect to continue having this issue
because the cable makes a sharp 90 at the bottom which adds a lot of strain
on the cable.
Other than that the sample case 60s work really well. We're routinely running
over 100 samples/day between the 2 systems and they seem very reliable. I
always calibrate my air pressures using either using a 7" J-Young tube or a
ceramic spinner so I have enough pressure to eject these samples.
Best,
Derrick
Dr. Derrick C. Kaseman
Technical Director of the NMR Facility
dckaseman_at_ucdavis.edu<mailto:dckaseman_at_ucdavis.edu>
530-752-7794<tel:+15307527794>
From: main_at_ammrl.groups.io <main_at_ammrl.groups.io> On Behalf Of Corey Liu via groups.io
Sent: Friday, June 9, 2023 1:08 PM
To: main_at_ammrl.groups.io
Subject: Re: [AMMRL] Bruker SampleCase Reliability #Bruker
Similar issue here. The shutters of the cover were occasionally sticking which
slowed down the process of moving between the concentric rings just enough for
the system to time-out every once in a while. The problem was sporadic enough
that it was tough to nail down. We eventually setup an old computer to continuously
video record the carousel so that we could try to capture what was different about
the times the system failed.
Bruker ended up cleaning off the shutters and also loosened up the clips holding
the shutters in place. The clips may have been crimped down a little
too tightly thus creating excess drag between the shutters.
Good luck!
--Corey, Sarafan ChEM-H
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