I'm mulling over the 6000 rpm conversion, and thought it would be good if I understood the warm-up process better. Ken Shea's instructions end by saying, "the spindle should be warmed up, increased over time to 6000 rpm, then run in at that rpm for an hour or two I have heard, and that does make sense." (post #17 here: HAAS Tm1)
Does he mean to say that the stock warm-up program (2020 I think) is not sufficient? Why would I want to run the machine flat out for 1-2 hrs.? Surely he doesn't do that every day!
I want 6K for occasional wood routing and engraving jobs. Is there a reason I should do more than the usual recommendation - run 2020 if it hasn't run for 4 days?