Cut Time per Pass
Cut time per pass and total time from cut length and feed rate: feed_IPM = RPM x IPR (or entered directly), t = length / feed_IPM, total = t x passes (first-principles distance over feed rate).
Formula and source
feed_IPM = RPM x IPR (when not entered directly); cut time t = L / feed_IPM (min); total = t x passes.
Cutting time as cut distance / feed rate, with feed rate = RPM x IPR - first-principles arithmetic as in Machinery's Handbook (Industrial Press), by name; public domain.
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