CAMAC Progress Report

                      Week Ending: July 20, 2001
                               Week: 25


Tom Folkers:
     1. Harry Fagg and myself flew to UMass to investigate the filter 
        banks and spectrometer they are offering to sell to us. This 
        took up the entire week.

Tom Sargent:
     1. Studied Bill Peters' description of the servo algorithm used 
        in the existing SMT system. It required very little adaptation 
        to fit in to the 12m software.
     2. Changed the name of the Linux host servo program (and several 
        associated files) from smtSL.c to servo.c.  Changed the name 
        of the DSP resident code (and several associated files) from 
        tracker.c to track.c to avoid confusion with the existing 12m 
        software.   Updated some documentation and made backups.
     3. Pete connected the 16-bit DAC output from the smtts to the DC 
        motor driving the encoder in our test set up.  Running the 12m 
        tracker program and using the old SMT servo transfer function, 
        it is able to close the loop.  The displayed position error is 
        in the +-5 arcsec range. This is pretty good considering that 
        the motor being used does not like to run at low speed and the 
        linkage from the motor to the encoder has a lot of torsional 
        spring in it.

Pete Hubbard:
     1. Mux board wiring under way. Had to barrow sockets to complete 
        wiring.
     2. Drawing schematic in Orcad capture. Learning to use release 9 
        a windows version very different from older version.
     3. Designed a buffer amp to drive the micro-motor that turns the 
        Rod encoder. This allowed closing the loop. First we started 
        with a gain of one, then increased it to two and found about 
        one half the error in tracking.

Dave Ashby:
     1. No Report.