How are machines parts made so exactly. I assume there is a master model that all lives are made from but how are those master models created so precisely and how are they measured.
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Comes in two parts, engineering and manufacturing. Engineers create the design, these days in computer models, but historically sketched on paper. Output of their work is manufacturing documentation. That includes drawings, circuit diagrams, 3D model files for CNC, bills of materials etc, it’s the complete specification needed to build the machine. For manufacturing it’s a matter of dividing up the labor, lots of parts are off the shelf and you have to buy them, a lot of metal work you can outsource or make in your own machine shop. Once you have all you need, then it’s assembly, putting it together according to drawings. Oh, and software, better not forget about that or your machine is a gigantic paperweight.
Of course, no real machine build is this straight forward. Engineers make mistakes, fail to foresee problems, manufacturing parts doesn’t always turn out right, mistakes happen and sometimes you only find out when putting the thing together or trying to get it working. Assembly mistakes also happen, it’s easy to connect something wrong and have it go up in smoke. Software of course is an endless source or difficulties on anything but the simplest machines. It’s a constant back and forth between all parties involved to sort out problems and get the machine up and running.
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