XPost: sci.electronics.equipment
From: presence@MUNGEpanix.com
In sci.electronics.basics Commander Kinsey wrote:
> On Thu, 16 Jul 2020 08:30:20 +0100, Cydrome Leader
wrote:
>
>> In sci.electronics.equipment Commander Kinsey
wrote:
>>> On Sun, 12 Jul 2020 20:21:10 +0100, Tom Gardner wrote:
>>>
>>>> On 12/07/20 19:01, Pimpom wrote:
>>>>> On 7/12/2020 11:15 PM, Commander Kinsey wrote:
>>>>>> On Fri, 26 Jun 2020 05:23:31 +0100, Cydrome Leader
>>>>>> wrote:
>>>>>>
>>>>>>> In sci.electronics.equipment Pimpom wrote:
>>>>>
>>>>>>>> My mechanical slide caliper has a resolution of 0.001 inch. This
>>>>>>>> means that it can display measurements with a precision of 1 mil,
>>>>>>>
>>>>>>> What if your caliper had a resolution of 1 mil +/- 3 counts on the last
>>>>>>> digit?
>>>>> .............
>>>>>>
>>>>>> In America, what is a "mill"? In the UK, it used to mean a thousandth
of an
>>>>>> inch, but people use it to mean a millimetre nowadays.
>>>>>>
>>>>>
>>>>> It's not a mill. It's mil - single l. It means, and has always meant, a
>>>>> thousandth of an inch. It's not an Americanism.
>>>>
>>>> In the UK "mill" means millilitre.
>>>>
>>>> If you want to refer to fractions of an inch, then
>>>> it is /always/ "thou", i.e. thousandths of an inch.
>>>>
>>>> In the UK "mil/mill" /never/ means 0.001".
>>>
>>> Yes it does. My neighbour's a tradesman (in Scotland) and says
>>> "mill/mil" (I don't know which as they sound the same in speech) as
>>> shorthand for millimetre. As in "that kitchen unit is 600 mill wide".
>>> Since we don't use inches for such things in the UK, there's no
>>> confusion.
>>
>> The context there is key too. While I'd not measure a countertop or
>> whatever in millimeters, it would make no sense that anything in a kitchen
>> would be measured thicknesses of paper.
>>
>> We (in the US) use "guage" for wire
>
> Isn't that really hard to work out? We use cross sectional area in mm.
Which is really easy to imagine. With the added bonus that a higher number is
thicker. It's also pretty handy as a rough guide that 1 square mm carries 10
amps.
Not really. If you can only count with your fingers you probably aren't
building anything impressive to start with. The entire fallacy of "metric
is easy, base 10, duh" is just bullshit. Check dimensions of anything
designed by people that don't know what fractions are. There are tons of
weird numbers like 13.1mm and so forth. It's no different than 1-1/8th
inches.
>> and sheet metal.
>
> Seriously? Wow. Why would you nbot measure a thickness in a unit of
distance?
The guage for sheet metal is sort of obnoxious. It will vary by type of
metal as well, if that makes any sense.
>> We also use "guage"
>> for measuring really thin stuff like plastic films. In the last case, it's
>> a completly different unit, but with proper context won't confuse anybody.
>
> We use microns.
how many microns thick is your plastic trash bag? The last ones I got were
speced on the box as "0.7 mil" There's no false sense of precision there,
like with the 610mm countertop or whatever it was.
>> Question for the metric woodworkers. Does anybody cut a piece of wood to
>> 317mm or 429mm or other off numbers when building a house or handing a
>> door or installing a countertop?
>
> Depends if something else is in the way. I'd always try to use round
numbers.
Would round be 320mm and 430mm instead of 317 and 429? Do you split in 5mm
increments too? I'm really curious about this.
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
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