My mechanic showed my some electronics from inside a fuel tank. Two wires have rubbed on each other and fused together (probably the subject of a made by monkeys column.) The customer complained that the fuse kept blowing so our repairer replaced it with a self-resettable fuse in a 40 amp circuit. It takes little imagination to figure out the wires will heat up inside the fuel tank and solve the customers problems for them PERMANTENTLY. Maybe this would be a case of repaired by murderers!
The second item of re-engineering by monkeys is a transformer replacement in a filament power supply running 480 volts, using a triac as the regulating element. It has a 480 primary transformer with a 32 volt CT secondary to supply the regulating circuitry. This is not a standard item anywhere so the repairer figured why not just replace the failed transformer with a 230 volt primary 64 volt secondary. Fine in theory except the matter of insulation, and the matter of 480 creating arcs that are hard to quench. There is also the fact that this unit is controlled through low voltage control circuits for operator interface, any of which might suddenly break down when 480 volts shorts through to the secondary side.
These fellas must have got their re-engineering degree from Shade Tree University.
What should be the perception of a product’s real-world performance with regard to the published spec sheet? While it is easy to assume that the product will operate according to spec, what variables should be considered, and is that a designer obligation or a customer responsibility? Or both?
Biomimicry has already found its way into the development of robots and new materials, with researchers studying animals and nature to come up with new innovations. Now thanks to researchers in Boston, biomimicry could even inform the future of electrical networks for next-generation displays.
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