Regulating Rack Trouble (Korean Piano Rant)

[Keith Roberts]

YC doesn't pay you to fix that. Just the 6 to 7 hours it takes to bring the
regulation up to good or where it would have been after 13 years. I opted to
bring it up to good, it didn't take much longer.
When you straighten up those hammers, are you going to realign the whippens
and the back checks to match the new hammer/string alignment? What's that do
to the capstan/whippen alignment? Are the hammers mated to the strings now?
The YC hammers that were pulled in the shop just last week, didn't come off
pretty. If you have to straighten them, burn them or heat gun the shanks.
Keith Roberts

----- Original Message -----
From: "Farrell" <mfarrel2@tampabay.rr.com>
To: <pianotech@ptg.org>
Sent: Friday, June 27, 2003 1:08 PM
Subject: Regulating Rack Trouble (Korean Piano Rant)


> Working on this Young Chang action, I discovered a flaw with the Spurlock
let-off rack/tool. I would adjust let-off of a couple section-end hammers,
install the let-off rack, and then I could not get the shanks to click on
the rack similar amounts. The problem with the rack is that is assumes
consistent hammer boring. What apparently is needed is a zig-zag shaped rack
that will accommodate hammers bored at varying positions.
>
> Tip to tail boring varies easily by 2 mm on neighboring hammers. And then
most (but of course, not all) of the hammers in the treble section were
installed with about a 2-degree treble lean. I don't yank hammers off newer
piano very often - will these come off cleanly with a Schaff-type hammer
puller so that I can straighten them? Is the Renner hammer puller
significantly better?
>
> I thought YC had this kind of garbage worked out by 1990?
>
> Terry Farrell
>
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