Re: [CAD_CAM_EDM_DRO] Re: How do I interpret accuracy

At 08:28 26/03/2004, you wrote:

>Hello,
>
>I'll give this a go...
>
>You wrote "the accuracy of a machine really is", and I'll add...
>
>Elusive. <G>
>
>The accuracy figures quoted in this hobby/desktop CNC market are not
>even close to correct. What you often see called "accuracy" is REALLY
>just the machine's RESOLUTION. And resolution IS NOT accuracy!
>
>Your next example is similarly misleading. This ".003/ft." is a
>statement of leadscrew pitch error, and is taken directly from the
>leadscrew manufacturerer's documentation.
>
>Both cases are examples of incorrectly stating a machine's capability
>by using a number that "sounds good", but really tells you very
>little.
>
><<SNIP>>

And remember - 67% of statistics are made up on the spur of the moment, and
48.352% of statistics are quoted to a meaningless level of precision ;-)


Regards,
Tony