Digital calipers

[Stéphane Collin]

Hi Joel.

Methink, a caliper is not accurate enough.  Try and measure a wire diameter. 
Repeat the same measure with more pressure on the caliper.  You won't have 
the same reading.  What pressure is the right pressure ?  For me, only a 
micro meter with accurate pressure system can tell.  And even then, two 
measures won't give the very same readings.  In my world, a caliper reading 
for wire can be a whole gage number off.

Best regards.

Stéphane Collin.

----- Original Message ----- 
From: "Joel A. Jones" <jajones2 at wisc.edu>
To: "Pianotech List" <pianotech at ptg.org>
Sent: Wednesday, July 12, 2006 5:22 PM
Subject: Digital calipers


> List,
>
> I have been using a digital caliper for about a year and find it
> to be very handy for measuring almost anything.   Tuning pin,
> center pins, wire, depth of holes etc.
>
> Any of you use a digital caliper?   Pros & cons of their accuracy?
>
> My reason for asking is that I found an ad for them in a Harbor Freight
> flyer with a price of $15.99 lot no. 47257.  Flyer also included a coupon 
> for 20% off.
> I am thinking of buying another one to carry.
>
> Thanks for your input.
>
> Joel
> Joel Jones, RPT
> Madison, WI
>
>
>