Was involved in the installation and commisioning of a $13M, 9 machine, automated machining cell. It was running perfectly when the "powers that be" came out to look at their expensive new toy. Just prior to them coming out to the cell, the thing went nuts-all kinds of errors, machine shutdowns, alarms, finally complete system shutdown. Ceremony was postponed while we tried to find problem. Turned out that the "in process/real time" information was coupled out of each machine by an optical system. Just prior to the "dog and pony" show, a well-intentioned janitor had made a pass through the area with a ride-on floor sweeper that had two safety strobes on it. It had apparently "glitched" the communication system to the point that nothing knew where it was, and the cell supervisory computer "failed safe" by shutting down. Cleared and reset entire system and it ran perfectly again. Were able to reproduce error a couple times to verify suspicions. Immediate, panic driven, low cost FEF (Field Expedient Fix) was to install a couple of coffee cups over the strobe lights of the sweeper when it was in that area.
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Today's Featured Article - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
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