[Files] Re: micrometer source for pianotech (Modified byKentSwafford)

[Carl Meyer]

The point I was making that for an original scale plotting you don't need
dead nuts accuracy since these figures only give a general idea what the
original wire sizes were.  The wire used by the string winder I assume will
be measure by them.  They should use the wire size you call out which will
be calculated by the scale program.

My 5 pound rolls of wire are measured accurately before I put them in the
dispenser and are labeled as to size.

I always measure a new set of bass strings for diameters of the core and
outside diameters and length before I install them.  Even there I think plus
and minus 1 thousandths is okay.  I wouldn't reject them unless they were
obviously.

I basically think a caliper used correctly is so much faster than a
micrometer, I am willing to accept a small error.  There are plenty of
larger errors to deal with that we have little control over.

Carl Meyer Ptg assoc
Santa Clara, Ca.

----- Original Message ----- 
From: "V T" <pianovt@yahoo.com>
To: <pianotech@ptg.org>
Sent: Wednesday, September 29, 2004 2:56 PM
Subject: [Files] Re: micrometer source for pianotech (Modified
byKentSwafford)


> Hello Carl,
>
> I am not so sure that one or two thousands of an inch
> is sufficient accuracy.  The difference between 13ga.
> and 14ga. wire is 2 thousands.  That would be the top
> 9 notes on a typical grand.  I have also noticed how
> difficult it is to get a clean tone out of mismatched
> unisons, and that's with wires that are 0.001"
> different (1/2ga.)
>
> Vladan
>
> ==================================
> ....
> I think a caliper is plenty accurate for measuring
> wire.  After all we are mainly checking an original
> scale and one or two thousands make little
> difference on the graph.  We really just want to see
> the general shape of the tension/ inh curve....
>
> Carl Meyer Ptg assoc
> Santa Clara, Ca.
>
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