Re: [CAD_CAM_EDM_DRO] Step resolution

In a message dated 8/19/2004 8:40:19 AM Central Standard Time,
azzi_b@... writes:
is the .0025mm per step right, and if so how good is this figure.
Also what would this be in imperial ?
azzi:

It amazes me how we dum' Yanks, the last in the world to "officially" embrace
Metric, can (usually) handle both mm. and Inches with much less difficulty
than you folks across the Pond manage both! At least when considering the
Continentals!

1 Inch (aka "imperial") is, by definition, 25.4000000 mm; 25.4 mm/in. To
convert inches to mm. simply MULTIPLY by 25.4. To convert mm. to inches,
simply DIVIDE by 25.4.

Thus, 0.0025 mm = 0.0025/25.4 = 0.0000984". Whew! That's not quite a
"tenth"! (here, "machinists" call one tenth of a thousandth of an inch "a tenth".
so, 0.0005 would be called "five tenths".) Machinist? In England, a
"machinist" is (perhaps logically) a person who operates machinery, regardless if
metal-working or woodworking. I think they call a "metalworking machinist" an
"engineer", which has a whole-nuther connotation here in the USA. Thousandth of
the inch? We call that "mil" here! I remember hearing you UK folk call a
millimetre a "mil". One must keep his ears, eyes, and thoughts open, or end up
WAY-wrong!

Jan Rowland, Yank Troll


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