CAMAC Progress Report

                      Week Ending: April 19, 2002
                               Week: 64


Tom Folkers:

Tom Sargent:
     1. I got the halt-in-path code working.  If the telescope is 
        slewing along a sun avoidance path (which is typically a great 
        circle), and it is directed to another object, it will 
        decelerate to 0 while staying on the sun avoidance path and 
        then start a new slew to the new object. The object can be 
        changed multiple times while it is slowing down.
     2. I adapted the MGIO system configuration scripts to use the new 
        IPs and computer names that have been defined for the SMT. 
     3. I appear to have beam switching working now. It failed on our 
        last trip to the SMT. 
     4. Made the sun avoidance logic compensate (approximately) for 
        solar motion during a slew.
     5. I discovered and fixed a couple of bugs in the sun avoidance 
        path computation. There was one case that I hadn't thought of.  
        I have worked out a grid of starting and ending positions 
        designed to excite problem cases, which I am going to test the 
        system with. 
     6. For those sun avoidance paths which are made by piecing 
        together two different tracks, I improved the smoothing of the 
        path at the point where the two join. Also fixed a bug in the 
        'breakPath()' function which computes these 2 piece paths.

Pete Hubbard:
     1. In the Vco-Mux chassis I changed the SN74LS157 chip to 
        74HCT157 with slight improvement. Also tried SN74ACT157 it has 
        more ringing because of faster edges. Next I will try series 
        termination resistor at the source, the Mux chassis.
     2. Got the lab encoder electronics ready for SMT testing next 
        week.
     3. Computer boards CIO-CTR20HD counters have 10K pull-up 
        resistors from the inputs to +5 Vcc. These don't match the 102 
        Ohm ribbon cable that connects the Vco-Mux chassis with the 
        DBE chassis. Series termination at the source may help this 
        problem.

Lori Warner:
     1. Out sick two days this week.
     2. Root will be installing Glade on my computer soon.
     3. Learning  gtk+, looking at examples, looking at main.c on 
        smtcont, reading the Eric Harlow book. (note: some of the 
        downloaded source examples do not match the ones in the book, 
        but that is okay)

Dave Ashby:
     1. No Report.