Hi David:
I bought an antivibration tire set from Bruker about two years ago. It has
been working very well. I guess your regulator might have problem and you may
need to get a new one from Bruker.
Frank
David Vander Velde wrote:
> We have 3 sets of the antivibration tires supplied by Bruker. For us, a
> chronic issue with these things is getting an exactly reproducible
> vertical position of the magnet after the tires are deflated and then
> reinflated for cryogen fills. If you throw the main switch, the magnet
> can make a pretty hard landing on the floor (alternatively, we have one
> tire that deflates extremely slowly). If you deflate and reinflate the
> tires individually, shim values are highly dependent on the exact height.
> The tires also change their position over a period of hours after these
> adjustments. The only way I have found to get a constant height is to
> inflate the tires fully, at which point the magnet is about two inches off
> the floor and alarmingly tippy. Bruker recommends that the magnet should
> be no more than an inch off the floor, which seems much safer.
> I have wondered about putting a real live regulator in the air
> line to each tire, so the position can be set by returning to a consistent
> pressure. Has anybody tried this? Does it help? Any other solutions
> which have been implemented and verified? Thanks, Dave Vander Velde,
> University of Kansas
--
Zhe (Frank) Zhou, Ph.D.
Co-Director of NMR Research Center
College of Basic Sciences, Louisiana State University
Baton Rouge, LA 70803, USA
Email: zzhou1_at_lsu.edu
Office: (225)-578-3460
Fax: (225)-578-3458
http://www.chem.lsu.edu/htdocs/people/fzhou/nmrweb/11.htm
Received on Fri Sep 27 2002 - 16:11:19 MST