Hi
We had serious problems with our feet aswell, like you we had one that kept
deflating. In the end I requested a swap and we have had no problem since.
The new feet that we have are entirley different in appearance to the ones
that were supplied originally.
I guess you do have another faulty set of feet.
Lu
-----Original Message-----
> From: David Vander Velde [mailto:dave_at_kunmr.chem.ukans.edu]
> Sent: Thursday, September 26, 2002 4:27 PM
> To: ammrl_at_chemnmr.colorado.edu
> Subject: antivibration tires
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
Received on Mon Sep 30 2002 - 09:26:20 MST