![]() Because of this, engineers tend to take a wait and see approach or ignore the possible problem altogether. The removal of the HMI in some cases like this would result in the whole machine having to be reprogrammed, rewired or redesigned in such a way that would not make financial sense. If the machine was built with a human machine interface that incorporated the display as a completely integrated whole, the display type may not be able to change in and out. There are many reasons but primarily is a result of the difficulty in changing the display type. Why are these old displays are still being used and why should they be upgraded? This type of display is bulky, consumes more energy and is altogether less efficient than these newer technologies, but is still in use in many machines. CRT Displays utilize beams or electrons projected on to phosphorescent screen the inside of a vacuum tube. A CRT is a type of older style display that predates the flat panel LCD (Liquid Crystal Display), LED (Light-Emitting Diode) or Plasma displays that are in wide use now. One of the biggest examples we have seen over resent years is the CRT, or cathode ray tube display. What often gets overlooked are the devices that may have a good reliability curve, but are an outdated or altogether obsolete technology. ![]() These are naturally the moving mechanical parts, load bearing mechanisms and the like. ![]() When we talk about aging equipment and the need to maintenance, upgrade or otherwise prepare for eventual failure, the focus tends to be on parts of the machinery with a high rate of problems.
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