On Tue, 26 Dec 2023 at 00:08, Linden via Emc-users <emc-users@lists.sourceforge.net> wrote:
> The second question I have is what would be a realistic cutting speed > range for the ball screw in RPM? Ball screws have a maximum rpm rating, though I suspect you won't be getting near to that: https://www.steinmeyer.com/en/technology/speed-limits/maximum-speed/ I have seen both ends used to drive the Z screw. Rotary SMP's Schaublin (on Youtube) drives from the tailstock end. I think that the fixed end should be the headstock end, regardless of the drive end, so that the screw is in tension during conventional cuts. The wires are easier to route and protect if the motor is at the headstock end. But the drive sprocket might make it hard to get the screw as close to the bed as you would like. (much less of a problem with tailstock-end drive) Whatever you decide, plan on having extra unused screw length for some spiral spring screw covers. These were fairly expensive (and difficult for non-corporate entities to buy) when I converted my lathe, but have since become fairly easy to get hold of. (I think that I have even seen them on Amazon). There are design considerations with them, but guides exist online. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
