Dear Tim,
We also often experience BACS motion failure here in Dundee. I appreciate very
much your advice on cleaning internal contacts and replacing impregnated rubber
ring. I have a broken BACS piston which I can use to play around with the
conductive rubber ring. Could you please share which blue rubber tubing fits
your BACS and how do you replace it if it is not too big ask please?
Many thanks,
Olga
> From: main_at_ammrl.groups.io On Behalf Of Tim Claridge via groups.io
> Sent: 26 September 2024 13:47
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] BACs downwards motion failed
As described in Ulrich's mail- this problem is (nearly) always associated with
dirt on the contacts within the rectangular piston block- cleaning the piston
arm itself is unlikely to resolve the issue. If the 4 allen bolts are remove
from the end of the block it is possible to access and clean the internal
contacts as described. These touch on a (blue) rubberised ring that is
conductive (impregnated) and when compressed (by the upward or downward
motion of the piston) will complete the contact that indicates the motion
is complete. Dirt on the contacts and/or the rubberised ring can lead to
the upward/downward motion failed error. We used to keep a spool of the blue
rubber tubing so we could replace this periodically to resolve these issues,
in addition to cleaning. Too much grease on the piston can also cause grease
to accumulate on the rubber which can exacerbate the problem, so go easy
on the piston grease.
Good luck.
Tim
Tim Claridge
Associate Director, NMR Analytics
+44 (0) 7842 000508
Exscientia
155 Brook Drive, Milton Park, Abingdon, OX14 4SD
Prix Galien International, Best Digital Health Solution 2024
UK Queen's Award for Enterprise in Innovation 2021
> From: main_at_ammrl.groups.io io on behalf of Craig Grimmer via groups.io
> Date: Thursday, 26 September 2024 at 12:21
> To: main_at_ammrl.groups.io
> Subject: Re: [AMMRL] BACs downwards motion failed
The little pots of grease are labelled "Horiz-Zyl" and "Vertikal-Zyl"
On Wed, 25 Sept 2024 at 22:44, Josh Kurutz via groups.io wrote:
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<mailto:jkurutz_at_uchicago.edu>
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Received on Mon Sep 30 2024 - 03:58:30 MST