Re: What makes a machine CNC ready?

That's a pretty bold statement.....

> With heavy home use, the ball screw will probably fail in 5

years.

> The lead screw will require a nut replacement in 2-3 years($64).
>
> Fred Smith - IMService
> http://www.cadcamcadcam.com/hobby
>

Why would that ball screw fail in 5 years? I have never seen any
references published that state the life span of a ball screw is 5
years, 10 years, or 20 minutes. The only references I have seen are
first hand on industrial machinery - not the same as the rolled
screws but at least it is a comparison. Anyway, there are machines
with ball screws as old as 30 years still running that I am aware
of. There are also ones I have seen fail in about 6 to 7 years -
usually on machines where cast iron is cut. But I have never seen a
published specification stating that a rolled (or other) ball screw
will fail within 5 years under heavy, light, or moderate use.

Perhaps you could provide use with those references?

Thanks

Chris