On Tuesday 26 August 2014 12:09:59 Gary Crowell did opine And Gene did reply: > Here's what I was thinking of: http://www.protoplant.com/stepperature > That page has links to the circuit, board, and code. > > It looks very well finished, and I have little doubt that it works, but > it includes this note: "Stepperature is not a position encoder. > Because of the small analog signal used to generate the signal it will > miss some steps if turned extremely slowly." > > Also, he uses a 0.9 degree motor to get 100 steps/rev. > > "Yeah, I seem to have miss-laid my round tuit too as the years go by. > In fact I haven't seen it since we moved from Rapid City in '71." > > Who warned you? I was there in '72. > Better job, you know, same theory as the woman who goes from man to man looked for a better night job?
In this case, as tx supervisor for Nebraska ETV at KXNE-TV, channel 19, where I learned the care and feeding of high powered klystron amplifiers ($150k a copy, toastable in 10 milliseconds with he wrong settings), even went so far as to identify the cause of one of the klystron amplifiers worst distortions. There were offered 2 schools of thought to fix it, but only the inverted incidental carrier phase modulation, applied directly to the visual oscillator actually made sense technically. Unforch, video speed frequency modulation was beyond the state of the art at the time, and not too many years later, the in-efficiency of the klystron amp got it replaced with a different technology that used a much shorter electron path to do the job, lessoning that distortion source considerably. The E=MV2 part of the theory of relativity was root of the cause. Depending on tune, they peaked at about 28%, so to get 30 kilowatts into the pipe headed for the antenna, took well over 120kw from Wayne County public power just for that tubes beam supply. The aural amplifier, usually a nearly end of life copy of that tube, needed around another 45kw. until some guy built a pair of air conditioned pig barns, over on the other side of Wayne, we were Wayne County Public Powers biggest customer, using about 15% of what they bought. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
