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I finally had a talk with the old timer who runs the manual lathe next to me
He's been running parts for 40 years and never touched a CNC. Last Tuesday during lunch he showed me how he felt a chatter before it happened by the sound alone. Do you guys think that kind of feel can be taught or is it just time in the seat?
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janarivera28d ago
Man that old timer sounds like he's got superpowers or something. I had a similar thing with an old mold maker who could tell a tool was dull by the squeak it made before the finish went bad. It's definitely time in the seat building that connection between your ears and the machine.
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bettyroberts27d ago
That's a good question but I gotta gently push back on something. That "feel" people talk about isn't a magical superpower, it's just really focused pattern recognition built up over years. In my experience the old guys aren't born with it, they just spend decades making the same mistakes until their ears and hands learn what's normal and what's not. You can speed it up a lot by paying close attention to what the machine tells you every single time you run it. Take this with a grain of salt but I think a young guy who really listens could pick up a lot of that in maybe five years if they're serious about it.
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Yeah but here's something nobody talks about - that "feel" actually changes as the machine wears in. Like a new lathe has tight fits that feel one way after 20 hours of run time. Then after 500 hours the bearings seat in and everything changes again. The old guys aren't just listening to the current cut, they're tracking the machine's whole life cycle in their head. I've seen guys walk past a Bridgeport and say "it's got a bad thrust bearing on the Y axis" just from hearing it idle across the shop. That's not pattern recognition on cutting, that's knowing that specific machine's voice down to its quirks from ten thousand hours together. It's like a marriage, not just skill building.
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