Originally Posted by Geof  furlongs per fortnight |
A wise guy, huh?
In explaining why IPM is used, I did not express any opinion of whether I liked it or not. I like IPR for use on a lathe. But, if the question was "why IPM", it could be considered a legacy parameter from the beginnings of motion control itself. IPT is a higher level term which must be plugged into an equation to solve for IPM. As cncs evolve, IPT may well become the norm eventually, but will never be a 'feedrate' in and of itself.