Abstract

A motor control system redesign is currently being finalized. It will be a modified design of the present system being used on X9B for the past twelve years. The new features will include relays that cut power to the motors in the event of a fault. There will be multiple ways of triggering and sending the signal to several motors to stop motors that move in tandem. This system has proven its reliability over the last twelve years with only one repair required. The new system will be able to handle up to 32 motors. There are currently 17 motors associated with the beamline, and typically 4 to 10 motors associated with a given setup depending on the complexity of a given experiment. With the new system we will motorize the primary apertures which are used to define narrow beams for beamline diagnostics and X-ray optics alignment. The monochromator has 4 motors that control the Bragg angle, the trolley position (beam height), the crystal radius of curvature and the cone angle. With the new system the Bragg angle will act as a Master, and the remaining three motors plus the voltage applied to the piezo stack will be slaved to it. Not only will this speed up the motion of the monochromator for step scan data collection, but the synchronous motion of the motors will allow data collecting while the monochromator is scanning.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR001633-17
Application #
6205753
Study Section
Project Start
1999-09-01
Project End
2000-08-31
Budget Start
1998-10-01
Budget End
1999-09-30
Support Year
17
Fiscal Year
1999
Total Cost
Indirect Cost

  Institution

Name
Albert Einstein College of Medicine
Department
Type
DUNS #
009095365
City
Bronx
State
NY
Country
United States
Zip Code
10461

  Publications

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Huang, Raymond Y; Miller, Lisa M; Carlson, Cathy S et al. (2003) In situ chemistry of osteoporosis revealed by synchrotron infrared microspectroscopy. Bone 33:514-21
Rashidzadeh, Hassan; Khrapunov, Sergei; Chance, Mark R et al. (2003) Solution structure and interdomain interactions of the Saccharomyces cerevisiae ""TATA binding protein"" (TBP) probed by radiolytic protein footprinting. Biochemistry 42:3655-65
Uchida, Takeshi; Takamoto, Keiji; He, Qin et al. (2003) Multiple monovalent ion-dependent pathways for the folding of the L-21 Tetrahymena thermophila ribozyme. J Mol Biol 328:463-78
Taylor, Colleen M; Watton, Stephen P; Bryngelson, Peter A et al. (2003) Inner-sphere complexation of cobalt(II) 2,9-dimethyl-1,10-phenanthroline ([Co(neo)]2+) with commercial and sol-gel derived silica gel surfaces. Inorg Chem 42:312-20
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Swisher, Jennifer F; Su, Linhui J; Brenowitz, Michael et al. (2002) Productive folding to the native state by a group II intron ribozyme. J Mol Biol 315:297-310
Dhavan, Gauri M; Crothers, Donald M; Chance, Mark R et al. (2002) Concerted binding and bending of DNA by Escherichia coli integration host factor. J Mol Biol 315:1027-37

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