Hi Justin.
In addition to cleaning the arm, are you also greasing it? I recall there are
two kinds of grease for the BACS – one for the piston, and one for the slider
that goes between the autosampler and magnet bore. I forget which one is which,
but I think the little jars of grease may be labeled.
Good luck!
* Josh
Josh Kurutz, PhD
NMR Facility Manager, Chemistry Dept.
University of Chicago
https://chemnmrlab.uchicago.edu/
jkurutz_at_uchicago.edu
> From: main_at_ammrl.groups.io on behalf of Justin Douglas
> Date: Wednesday, September 25, 2024 at 3:33 PM
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: [AMMRL] BACs downwards motion failed
Hello,
Our BACs autosampler (on a Bruker AV400) is producing a "DOWNWARDS MOTION FAILED"
error, which disrupts the queue in ICON (and leaves the lift air on, sometimes
all night!). The advice I was given by Bruker was to clean the arm. It is not
100% clear to me what specifically needs to be cleaned. In addition, we are
getting this error more and more frequently and I'm having to clean the arm more
and more often. It is not clear that it is really that dirty!
My method is to take special care to remove the arm, remove the bolts with an allen
wrench and wipe the piston thoroughly with chemwipes and methanol. I also use q-tips
and methanol to swab the o-rings, etc. I'm wondering if anyone has any more specific
advice on how to stop (or at least decrease the frequency of) these DOWNWARD MOTION
FAILED errors.
Thanks
Justin
Justin Douglas
he/him/his
NMR core lab
University of Kansas
justindouglas_at_ku.edu
justindo_at_gmail.com
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Received on Wed Sep 25 2024 - 13:44:21 MST