4 ms·
I have so many piles of drawings at work for all sorts of European manufactured machines that are about 6m in length that have their layouts (where mm level pre
by quartesixte 5y ago
I have so many piles of drawings at work for all sorts of European manufactured machines that are about 6m in length that have their layouts (where mm level precision is silly and pointless) drawn out and measured in mm. 6000mm x 2000mm x 10000mm etc etc. It’s like...why??
As for the precision, I suspect it’s to defeat the perils of floating point numbers in computers...if you only need mm precision, you rather your CNC computer do integer math and not floating point math...am I correct?
- teruakohatu 5y agoBecause if everyone millimeters then there is no confusion. For that reason I rarely see anything non-consumer specified in cm. > CNC computer do integer math and not floating point math...am I correct? Good point.
- actually_a_dog 5y ago> As for the precision, I suspect it’s to defeat the perils of floating point numbers in computers...if you only need mm precision, you rather your CNC computer do integer math and not floating point math...am I correct? I doubt that. It would be trivial to have the computer convert from 6.000m or 600.0cm to 6000mm internally.
- chousuke 5y agoWhy not, though? Millimeters are trivial to convert to meters in your head, since you don't need to calculate anything; just move the decimal point. Using millimeters gives you a "standard precision" which is a boon for interoperability.
- quartesixte 5y ago>Why not, though? Because all my tape measures are in inches ;(
- kaba0 5y agoYou wouldn’t be helped by cm-s either :/
- HPsquared 5y agoFor precision work using inches, decimal thousandths of an inch ('thou') are typically used - for what I assume are similar reasons.