Re: High performance Machines

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Yesamazza@a... wrote:

> Hi
> I would agree that 1000IMP for a five pitch screw is

unrealistic. I

> would want a direct drive system so the pitch of the screw would be

the only

> control of the "gearing" I haven't seen anything to make me think

that it couldn't

> handle the speeds to achieve common servo rpm ratings. I would be

building

> small machines 18" max on any axis. I run machines every day and

would like to

> make some custom machines that can perform up to that of factory

built

> machines. There are factory built direct drive 600 IMP machines

that I believe us 5

> pitch screws and 1200 to 1400 on something close to 2 pitch. Which

makes me

> think 2500 rpm is possible in a short rigid system. Am I way out

in left feild

> or is no one building machines over 200 IPM?? Thanks Josh
>

Alot of things can be done if throw enough money at it.
Nowadays High Speed machining is the big buss word in the
industry and much is spend on archiving it.
Industrial machine builders use cutting edge tech to get there
often holowed out leadscrews are used to decrease dynamic
imbalances to counter the wipping effects.
Larger pitches on Leadscrews are also more common now to reduce
the required RPM of the screws.
Another methode is to use a stationary Screw with a rotating Nut
design to allow for higher speeds.
The newest trend is induction field propusion to eliminate
a Leadscrew all together.
It will take a while in my opinion before any of these methodes
will become viable for the Hobby market costwise.