[CAUT] Plate locator holes

[Alan McCoy]

Yep, I always have drilled them after removing strings and before removing
plate screws. But I have to admit that except for string height, I have
never yet been able to get the plate in the exact same position before and
after. Depending on the nature of the job, I have never felt a mm or so was
all that critical. If it's getting a new board with a new bridge with a new
string scale that calls for a new bridge location, or whether the height of
the strings was correct to begin with or whether you need to change some
other aspect. Each job is so different that only sometimes are these locator
holes critical.

FWIW.

Alan


-- Alan McCoy, RPT
Eastern Washington University
amccoy at mail.ewu.edu
509-359-4627
509-999-9512


> From: Jeff Farris <Jfarris at mail.utexas.edu>
> Reply-To: "College and University Technicians <caut at ptg.org>" <caut at ptg.org>
> Date: Fri, 13 Feb 2009 08:47:39 -0600
> To: <normancantrell at sbcglobal.net>, "College and University Technicians
> <caut at ptg.org>" <caut at ptg.org>
> Subject: Re: [CAUT] Plate locator holes
> 
> Norman,
> 
> Yes, that¹s my logic as well.  Thank you.
> 
> Jeff
> 
> 
> On 2/13/09 7:43 AM, "Norman Cantrell" <normancantrell at sbcglobal.net> wrote:
> 
>> Jeff
>>  
>> When I have drilled locator holes I have always done so with the strings
>> removed but before loosening the plate screws.  If I am going to use the
>> holes
>> for alignment I will not have any strings therefore no tension in place when
>> fitting the block/plate assembly to the piano.  If you drill them with
>> tension
>> in place there is always the chance that 20 tons or so of tension will
>> slightly affect the plate dimension and thus the locator hole itself as well.
>>  
>> Norman Cantrell, Registered Piano Technician
>>  
>> 
> 
> 
> Jeff Farris
> Piano Technician
> School of Music
> UT Austin
> jfarris at mail.utexas.edu
> 512-471-0158
>