Hi Jim,
I forgot to mention this was done for a RT probe. I jusr realized that I didn't
see your original message. Our old cryoprobe did have a detachable ATM unit.
I'm not sure if yours is built in.
________________________________
> From: nadia beepath <nadiabeepath_at_hotmail.com>
> Sent: Saturday, October 4, 2025 10:25:21 pm
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: Re: [AMMRL] Tuning rods pinned?
Hi Jim,
I had a similar issue some time ago. You might have to remove the probe from
the magnet completely. Reattach the pics cable to the probe outside of the
magnet and then do atma or atmm without any sample inside to check for a
response from the rods. You should then observe the a response (the relevant
rods will turn depending on the nucleus it is tuning/matching for) . Note:
be sure be sure to switch off your lock and sweep before you remove the
probe. Once you see the rods responding outside the magnet, you can replace
the probe and retry. I also prefer to do atmm or atmm acqu instead of atma.
I hope this helps.
Best regards,
Nadia Singh
The University of the West Indies
St. Augustine
Trinidad and Tobago
Nadia.singh_at_uwi.edu
________________________________
> From: main_at_ammrl.groups.io on behalf of Baleja, James D via groups.io
> Sent: Friday, October 3, 2025 9:39:41 PM
> To: main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> Subject: Re: [AMMRL] Tuning rods pinned?
Hi all, I reset the PICS line, and re-wrote the .bb file (changing the +244
to -99, because that’s what I saw in the 90%/D2O line)
But alas get a similar error message "Can't move to position-99 (current 3)"
Maybe the next step is to remove the ATM unit so I can access the tuning rods
(I don’t think they are accessible without removing the ATM).
First I have to figure out how to remove the ATM unit!
Have a good weekend
Jim
--------------------------
Jim Baleja
Pronouns: he, him, his
Department of Medical Education (MV525S)
Department of Developmental, Molecular, and Chemical Biology (lab:Room MV614, rear)
Tufts University School of Medicine
136 Harrison Avenue
Boston, MA 02111
Tel: 617-636-6872
> From: main_at_ammrl.groups.io On Behalf Of PLscientific
> Sent: Thursday, October 2, 2025 6:51 PM
> To: main_at_ammrl.groups.io
> Subject: [External] Re: [AMMRL] Tuning rods pinned?
Hi Jim,
I would repeat the Ed suggestion. It is indeed a probe-dependent, but 244
looks too high a number for 1H tuning, so the .bb file was likely overwritten
with the wrong number. In whichever case, after correction of .bb file (if
it was done correctly for the correct NMR probe), you should see a different
number in your ATMA error, like
"Can't move to position 21 , current -3" . If it continues to complain about
244, restart Topspin one more time. Indeed, it's good to swap PICs because the
ATMA probe reinitialization will be done again afterward.
Regarding the .bb file, other solvents may have a correct value, so you may
try to change a solvent simply by starting lock on another solvent.
If a similar problem occurs with the correct .bb file, the ATMA system will
have to be repaired. The simplest would be to check if the motor has not
got stuck in one of the limit positions (a rare reason, but you mentioned 19F).
Over the last three years, > 10 of our customers have asked us to fix that
error-related fault, so it is relatively common for the 2nd generation of
ATMA probes...
Regards,
Dr. Pavel Iouchmanov,
--
Repair/upgrade of NMR probes and NMR spectrometers
Electrophoretic NMR and custom NMR solution for electrochemistry
--
+46736220672
P&L Scientific AB
Applied Physical Chemistry, KTH
Teknikringen 36,
100 44 Stockholm
Sweden
pavel_at_plscientific.se<mailto:pavel_at_plscientific.se>
http://www.plscientific.se
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Received on Tue Oct 07 2025 - 04:40:17 MST