Cleaning up math (was Who had some .100 pitch ball screws FS??)

Jon

The real problem is that you're using a compliment of 25.4mm which
seems to have an infinite number of places.

Instead of dividing by the compliment of the conversion factor
25.4mm as in:

1in / 0.039370078740157480314960629921259842519685... = 25.400... mm

you should multiply by the conversion factor of 25.4 as in:

1in * 25.4mm = 25.4mm

Graham



--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Anderson <janders@n...>
wrote:

> Graham Hollis wrote:
> >
> > The problem comes in you're using 0.0394 instead of 0.039370079
> > which is arrived at by 1/25.4
>
> I'd just pulled that number off a conversion factor chart. Your

numbers

> yield a deviation smaller yet. Close enough that virtually nobody

would

> be able to tell the difference between a .100 and a 2.5mm pitch

screw

> visually checking with calipers. Thanks for cleaning up my math a

bit!

>
> Jon