One thing I did not notice in all th previous postings:
HOW MUCH inaccuracy
are you actually talking about for
the HF calipers?
Doug
--- On Mon,
11/2/09, David Scheidt <dmscheidt@gmail.com> wrote:
> From: David Scheidt
<dmscheidt@gmail.com>
> Subject: Re: [Shop-talk] Micrometers
> To: "Arvid
Jedlicka" <arvidj@visi.com>
> Cc: "shop-talk" <shop-talk@autox.team.net>
>
Date: Monday, November 2, 2009, 1:26 PM
> On Mon, Nov 2, 2009 at 9:49 AM,
Arvid
> Jedlicka <arvidj@visi.com>
> wrote:
>
> > We will agree to disagree
on the "is junk"
> part.
> >
> > And I believe I did think about it. I came to
the
> "accurate measurements
> > party" pretty late and therefore everything I
have is
> digital. A mechanical
> > vernier caliper may not have any way to
set the zero
> datum but all of my
> > digital ones do. So I have naively set
the zero as
> needed and gone about the
> > business of getting what appear to
be accurate
> measurements - i.e. things
> > fit together when I am done -
without any problems.
> >
> >
> One of the things that I use calipers for is
to transfer a
> measurement from
> one part to another. I'll measure the size
of a hole,
> and then use the
> external jaws to mark a piece. I'd throw away
any
> caliper that required me
> to read the measurement, close the jaws, set
the zero
> point, and then reopen
> the jaws and set them to a particular
measurement, which
> I'd've forgotten by
> this point. The guy who taught me
to do this (and
> also how to read a
> vernier caliper) was a tool maker for
decades; it's
> standard practice when
> making things where absolute measures
aren't important,
> just that things are
> the same size.
>
> --
> David
Scheidt
> dmscheidt@gmail.com
>
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