Re: [CAD_CAM_EDM_DRO] Re: What makes a machine CNC ready?

At 11:44 28/06/2006, you wrote:

>At low leads, I agree with your assessment. Also Fred is using Kerk
>screws/nuts I believe, and these are teflon coated which does
>improve the efficiency as well; but at a prohibitively high price
>IME for onesie twosie hobby use purchases. (Kerk is really set up to
>provide for OEMs IMO/E.)

Ballendo -

That was my point - Fred's article talks about efficiency for "typical"
Vee, Acme and Ballscrews; the Kerk screws he referred to are definitely not
"typical" other than in the sense that "typically, Fred uses them". The
Acme screws that we are mostly likely to come across, for example the ones
fitted to Eastern imported machines, are unlikely to perform much different
than equivalent Vee form screws.

I agree with you that sliding contact is not all bad though, for the
reasons you mention.

Regards,
Tony