Early 70's, company decided to eliminate 4 overhead bridge crane operator jobs on a 2 bay/2 cranes per 600' bay installation. Bought a then "state of the art" AB digital processor/control system for ~$400k (analgous to elevator call/que scheme). Vendor took 3 months to install/debug system. Worked great until shutdown when another vendor was employed to do some mods. on the crane rails/supports. Poor welder grounding apparently fried the system; the electronics vendor was not responsible, welders went out of business. Company had to eat it. Just an example of what improper grounding can do.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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