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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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The Work Envelope Problem
On Aug 24, 9:01 am, Nick Mueller wrote:
Tom Roberts wrote: I see no _theoretical_ problem in constructing a machine tool that has work extending outside itself by distances larger than the size of the tool itself. ... Nick A machine can build a structure larger than itself if it has closed- loop positional feedback that allows it to correct errors. If I understand what DG is looking for, this means the self-replicating machine tool would have to make laser rangefinders as well as duplicate all its own mechanical parts. The basic self-replicating unit may be a diversified company that owns both a steel mill and an IC fab. jw |
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