[pianotech] Pearl River Upright

[Brian Wilson]

Matthew
Even though the Pearl River piano isn't known for its high standard, the 
same rules apply to this piano as did the Kawai upright a couple of months 
ago.
Adjusting let off is not the answer, even though the P R does require a 
larger let off than better built pianos. The problem is either 1. strike 
distance being too large or 2. key dip too shallow.3. Has the piano not been 
serviced correctly and there is too much lost motion.
 I am not a betting man, but I would put money on number 1. Most of the 
cheaper pianos do not have their strike adjusted properly in the factory. 
Several makes come to mind and most of them are at least 2 inches. Kawai and 
Yamaha both use jigs that are 46 mm from the string. anywhere from 45 to 48 
mm is the go... please work it out to imperial.... I'm a metric man.
Keydip can be incorrect but most manufacturers get it too deep, so that is 
better than too shallow.
My money is on the strike distance.... blow. correct it and adjust the 
capstans. What is the problem with the capstans? Get the correct tool for 
the job. Makes life easier.

Before you check the strike distance as I have mentioned, you should really 
try adjusting the capstans like you mentioned. Find your answers by 
experimentation and then after you have exhausted your ideas, move on to 
asking your peers.

Regards
Brian Wilson
Brisbane, Australia

.
----- Original Message ----- 
From: "Matthew Todd" <toddpianoworks at att.net>
To: <pianotech at ptg.org>
Sent: Thursday, September 03, 2009 9:04 PM
Subject: [pianotech] Pearl River Upright


> Went to tune a Pearl River upright yesterday.
>
> After I finished, the client pointed out the double strike issue, when he 
> would play softly. Sure enough, there is the bobbling hammer issue.
>
> I took my let off tool and adjusted let off on a few sample notes, and 
> that got rid of the double strike sound. However, as I observed the hammer 
> as I continued to play softly, the hammer wanted to double strike. 
> Apparently it was bobbling on the jack.
>
> Like I said, I got rid of the annoying double strike by adjusting the let 
> off. Would adjusting the capstans create solid hammer travel and rid the 
> bobbling to and fro?
>
> Which brings up another point. My capstan wrench does not fit on the Pearl 
> River capstans. Do I need to order a specialized one from the company?
>
> Thank you for the help,
> Matthew


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