"Bill Schwab" wrote in message
...
snip-----

With the flycutter, I can already see a massive improvement in the
alignment. Suddenly, the "leading and trailing edges" both typically
leave marks on the surface. I won't claim that it's dead nuts yet
(pretty sure it's not), but it is probably not off by much.

Bill

Cool! That's what you're looking for.

My experience with mills indicates that you'll never get it "perfect".
There's rise and fall to some degree in almost all tables, so you get a
changing pattern, but on the average, you don't want a lip where cuts
overlap. It will always show a difference because of the variable feed
rate, almost non-existent at the edges of the cutter, and the coarsest @ 90
degrees. I think you get my drift. Bottom line is when the head is
correct, you don't get steps. That's the target, anyway. The cross-hatch
you mentioned as an excellent indicator that the head is correct in one
plain. When you can duplicate that pattern by moving the saddle, the head
has to be true.

Sounds like you're getting a handle on the machining thing, Bill.

Harold