APERTURE CARD PLOTTER
Technical Report,01 Oct 1967,15 Feb 1968
FRANCIS ASSOCIATES INC MARION MA MARION
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The Aperture Card Plotter was developed for use with a Bathythermograph System and other applicable data recording instrumentation. The plotter provides an automatic means of recording temperaturedepth traces in a manner suitable for integration with computerized transmission, storage, retrieval and readout systems. Test operations using the prototype plotter showed the overall feasibility of the equipment. Functions such as write rate, lamp ignition, overheat and card-to-card repeatability were satisfactory, while long-term effects of vibration on spot intensity and lamp stability were possible problem areas requiring further tests. Two problem areas were found with respect to calibrated accuracy a the effect of temperature on the reference circuitry, and b the nonconcentricity or droop of the extended ball spline. To meet the original plotter specifications, it would be necessary to investigate and resolve these problems, and to provide the redesign effort required to fabricate a second engineering prototype plotter. In addition, to develop a manufacturing design, functions such as programming circuitry, lamp ignition power supply circuitry, and the time axis drive mechanism should be re-evaluated with respect to simplification and subsequent improvement in reliability.