Dear everyone,
I deeply appreciate many of you who took their time to write emails of
your suggestions in response to my inquiry. I have realized that
someone of you might also encounter it either now or in near future.
I therefore summarize those good points here:
1. Inspired by Andrew, I talked to local sale rep and tech
immediately. I indeed found the weak magnet is set by the
manufacture. Because our MAR system has automatic motor control and
automatic crystal mounting, the magnet can not set too strong. As a
matter of fact, I believe that such a robot is really useless for home
source X-ray. To solve this problem, as Manfred suggested, a sort of
permanent magnet adapter can be used. However, our local sale
requested a payment for such a fix although the system has only been
installed for a little over 6 month.
2. As the problem might come from pins, many pointed to those HTP
pins with matrix labels. I have indeed found there are clearly
different for different types of pins, even though most types are from
Hampton Research. Here I have to ask Hampton for an answer.
However, when we removed those silly labels, as Bob suggested, it did
not make any difference. Those pins from Mar research are
significantly stronger and also much better manufactured, but I
suspect its aperture design might cause moisture accumulation and ice
build-up.
Thank you again for your time and great suggestions.
Cheers
Aidong
Aidong Han, Ph.D
Department of Biomedical Sciences
The School of Life Sciences
Xiamen University
Xiamen, Fujian 361005
Phone: 0592-218-8172(O)
0592-218-8173(L)
