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| Lathe Screwcutting Idea |
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| John Hill:
I suppose one could start the carriage moving at an instant synchronised with a single contact on the spindle, advance the carriage the required distance, retact the tool, reverse the carriage the same distance, advance the tool, restart the carriage again at a time triggered by a spindle contact. Providing the pulses to move the carriage were synchronised to spindle speed the process seems almost trivial, I am probably missing something. :coffee: |
| Weston Bye:
What John describe is precisely what happens with a CNC lathe. There are a couple of them where I work that turn, face and single point threads on a part all at the same fast spindle speed. The threading takes 6 or 7 passes of the tool and moves back and forth in the motions John describes to thread a section about 3/8" long faster than I can brush my teeth. Powerful motors are used, as the tool holding axis is massive and supports multiple tools. |
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