Keyslips making keys stick

[A E]

>From my observation this happens in pianos with a "thin" keyslip, it seems only logic that it will bend or flex... or whatnot... I crossed a few pianos.. european pianos mainly that have a heavy solid keyslip (bout an inch thik), its never been a problem on such pianos... if its wood perhaps its humidity?
About 3 weeks ago i had a problem (it was 96*F with 85% humidity) i was seriving a Bechstein, skinny keyslip.. its never been a problem, but the owner called me because the keyslip crowned inward and was jamming the keys... ive worked withthat piano for 2 years and its never been a problem... owner said that piano stood constantly next to an open window... so go figure.. i put a small screw into the front of the keyframe and adjusted it to keep a nice space...
 
hope this helps...
 
Alicia Evans


From: imatunr at srvinet.comTo: pmc033 at earthlink.net; pianotech at ptg.orgSubject: Re: Keyslips making keys stickDate: Fri, 20 Jun 2008 08:03:56 -0600



Hi Paul,
A small screw placed at the bottom of the inside corner of a cheek block, will cant the front and outside of the block,
so that the block will push the key slip out away from the keys. Advantage is that it also keeps the block firmly against the outside arm and is fairly quickly adjustable.
Joe Goss RPTMother Goose Toolsimatunr at srvinet.comwww.mothergoosetools.com

----- Original Message ----- 
From: Paul McCloud 
To: Pianotech List 
Sent: Thursday, June 19, 2008 11:16 PM
Subject: RE: Keyslips making keys stick


Hi, Paul:
I've seen a lot of this kind of binding with the keyslip.  Especially in said brand.  I used to move the keyframe backward (yeah, I know.  The optimum strike point is lost).  At least the piano would play again.  What really needed to be done was to plug and redrill the dowel pins in the cheek blocks and move the blocks forward a few mm's.  Sometimes I put felt strips on the front of the cheek blocks to shim out the keyslip.  Usually, on the newer grands, the cheek block has a notch which engages the keyslip and holds it.  I've tried shimming up the bottom rear edge of the keyslip, but that does nothing.  I've sometimes also added a small screw to the front of the cheek block, which can be used to adjust the keyslip without shims.  I also sometimes sand the ends of the keyslip so it will fit without binding on the inside of the arms.
 Not a huge deal but annoying and time consuming to remedy.  Welcome to the club.
    Paul McCloud, RPT
    San Diego
 

Paul McCloud
Service Technician for PianoSD.com
www.pianoservsd.com 
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----- Original Message ----- 
From: paul bruesch 
To: Pianotech List
Sent: 06/19/2008 10:06:57 PM 
Subject: Keyslips making keys stick
I've noticed a number of keyslips that bow (crown?) and/or tilt towards the key fronts, thus causing keys to stick down when played. Today I visited a YC TG150 baby with this problem.  I had pulled the action in it just over a month ago and all was well when I left that day. Today, I could hardly get the keyslip out (or back in), the ends were binding so tightly against the sides... much, MUCH harder than last month.  I've shimmed a couple of these out now with front rail felts which results in a nice even gap, but I curious why I'm seeing so many of these lately. At least 50% are on pianos that I either have not seen or at least not removed the keyslip in the past. The one I did two days ago had a folded up business card (current owner's mom's tuner's card from 20 years ago) already in there.I've only been tuning for about 3-1/2 years, and I see more pianos these days, but the incidence seems to be picking up not! iceably. Is this such a common problem in general? I'm thinking that today's was possibly caused by increased humidity, except I believe there was a thread recently that mentioned that expansion isn't really an issue along the grain... and come to think of it, I don't believe that this keyslip is "wood" anyhow.Thoughts?Paul BrueschStillwater, MN
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