---------- Forwarded message ---------
> From: Ulrich <Ulrich.Haunz_at_uni-konstanz.de>
> Date: Thu, Sep 26, 2024, 3:53 AM
> Subject: Re: [AMMRL] BACs downwards motion failed
> To: <main_at_ammrl.groups.io>
Dear all,
there is a special 'Anleitung' to solve this problem:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
ANLEITUNG REINIGUNG VERTIKAL ZYLINDER BACS H1259
Upwards motion failed Fehler 3 am display
oder Downwards motion failed Fehler 2 am display
1. BACS ausschalten
2. Zylinder zum Magazine per Hand schieben
3. Kolben nach unten drücken
4. Die 4 Imbuss Schrauben mit 4er Schlüssel entfernen
5. Kolben nach oben schieben
6. Unter dem 4 Quant Block den kontakt Ring mit Isopropanol reinigen
7. Die 2 Messing Halbschalen (oben am Kolben) mit Q-Tips und Isopropanol
reinigen und wenn nötig mit einem dünnen Schraubendreher den Schmutz
entfernen.
8. Den Kolben mit Isopropanol reinigen und dünnes Lager Fett (im Zubehör
Koffer des BACS H5042) auftragen
9. Kolben nach unten drücken und Block wieder in korrekte Position vonoben
mit den Imbuss Schrauben anbringen (Richtung des Schlauchs!)
PS Beim Auftreten von Downwards Motion failed den Block von unten lösen und
reinigen
Viel Erfolg
Michel Neubert
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
How to clean the vertical cylinder of the BACS H1259
Upwards motion failed - error 3 at the display
Downwards motion failed - error 2 at the disply
1. switch BACS off
2. push to the magnet by hand
3. push the cylinder down
4. remove the four screws with the screw driver 4
5. push the cylinder up
6. under the black quant block - is a brass ring for contact - use
Isopropanol to get the old grease out
7. the two hafs of the brass half rings (on the top of the piston) - use
Q-tips and Iso-Propanol to get the complete dirt away - until the Q-tip
keeps white.
8. Clean also the outer part of the piston with Isopropanol and put a small
layer of beige grease (H5042 in the box for the BACS) on the outside of the
piston.
9. put the piston down and screw the screws in. If the piston does not go
down - please put the hose with the pressure in - off.
PS if the Downwards motion still failes - also remove the screws from the
other side and do the same cleaning on the bottom side of the black block.
Good luck
Michel Neubert
This is my translation for you.
I did this often with my 5 BACS systems and it helped often.
Good luck with the cleaning procedures.
Yours sincerely,
Ulrich Haunz
Am Donnerstag, September 26, 2024 00:11 CEST, schrieb "Heather Schenck":
> One more note on cleaning: to remove old grease, hexanes may be more
> effective than methanol.
> ________________________________
> From: main_at_ammrl.groups.io on behalf of Justin Douglas via groups.io
> Sent: Wednesday, September 25, 2024 2:25 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
>
--
=========================
Ulrich Haunz, Dipl.-Ing. (FH)
NMR-Spektroskopie
Raum L 710, L 807
NMR-Center M520, M521, M527
Postfach M 715
Fachbereich Chemie
Universitaet Konstanz
78457 Konstanz
Tel.: +49 (0)7531 88-4261 -> M521 Bruker Avance NEO 800
Tel.: +49 (0)7531 88-4422 -> L807 JEOL Lambda 400
Tel.: +49 (0)7531 88-4955 -> L710 Bruker AVIII HD 400
Tel.: +49 (0)7531 88-4956 -> M520a Bruker AVIII 600
Tel.: +49 (0)7531 88-4957 -> M527 Bruker AVIII 400 Automation
Tel.: +49 (0)7531 88-4958 -> M520 Bruker AVIII 400 WB
Tel.: +49 (0)170 9153213
FAX : +49 (0)7531 88-3898
=========================
_______________
______________________
Todd Rappe
Minnesota NMR Center <nmr.umn.edu>
612-625-9147 (office)
651-321-TODD (rings office and mobile)
612-624-8892 (magnet lab)
On Mon, Jul 21, 2025, 7:07 PM Philipp Hegemann via groups.io wrote:
> Dear members of the AMMRL community,
>
> we have been experiencing a recurring issue with our BACS sample changer
> connected to an Avance II 300 MHz spectrometer.
>
> The error message “downwards motion failed” appears regularly, even though
> the vertical cylinder moves down correctly.
>
> In a first try, we replaced the entire vertical cylinder with another
> unit, but unfortunately without success. The error continued to occur.
>
> In a second attempt, we replaced the entire BACS sample changer with
> another unit that had become available after decommissioning an older
> spectrometer. This BACS unit had previously operated reliably. However, the
> same error (“downwards motion failed”) occurred again, which led us to
> revert back to the original BACS. The error still persists.
>
> We also reconnected the RemoteControl port (and exchanged the cable) on
> the BSMS to a different socket and updated the corresponding setting in
> “cf”. The sample changer can be addressed correctly via IconNMR and the
> “rstest” tool but the error continued to occur
>
> In addition, we regularly receive the error message “Sample Detect at
> Magnet Failed” when attempting to place the sample on the lift.
>
> We would greatly appreciate any suggestions regarding the potential cause
> of the issue or further diagnostic steps.
>
> Greetings
>
> Philipp Hegemann
>
>
>
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Received on Mon Jul 21 2025 - 20:22:38 MST