Welcome to the Piano World Piano Forums
Over 2 million posts about pianos, digital pianos, and all types of keyboard instruments
Join the World's Largest Community of Piano Lovers (it's free)
It's Fun to Play the Piano ... Please Pass It On!

Gifts and supplies for the musician

SEARCH
the Forums & Piano World

This custom search works much better than the built in one and allows searching older posts.
(ad) Pianoteq
(ad) Pearl River
Pearl River Pianos
(ad) P B Guide
Acoustic & Digital Piano Guide
(ad) Lindeblad Piano
Lindeblad Piano Restoration
Who's Online
133 registered (Albunea, 36251, accordeur, anamnesis, 36 invisible), 1418 Guests and 14 Spiders online.
Key: Admin, Global Mod, Mod
(ad) Estonia Piano
Estonia Pianos
Quick Links to Useful Piano & Music Resources
Our Classified Ads
Find Piano Professionals-

*Piano Dealers - Piano Stores
*Piano Tuners
*Piano Teachers
*Piano Movers
*Piano Restorations
*Piano Manufacturers
*Organs

Quick Links:
*Advertise On Piano World
*Free Piano Newsletter
*Online Piano Recitals
*Piano Recitals Index
*Piano & Music Accessories
*Music School Listings
* Buying a Piano
*Buying A Acoustic Piano
*Buying a Digital Piano
*Pianos for Sale
*Sell Your Piano
*How Old is My Piano?
*Piano Books
*Piano Art, Pictures, & Posters
*Directory/Site Map
*Contest
*Links
*Virtual Piano
*Music Word Search
*Piano Screen Saver
*Piano Videos
*Virtual Piano Chords
Topic Options
#620340 - 02/10/02 04:14 AM Warped key bed
Christopher Stubbs Offline
Full Member

Registered: 12/20/01
Posts: 27
Loc: Wales, UK
It's an 1885 John Broadwood & Sons 6' 6" grand. Starts from an octave either end. The warp is approx. 1cm. Any suggestions?

Top
(ad 568) PTG Convention 2015 Denver
PTG Convention July 15 to 18 Denver
#620341 - 02/11/02 10:32 PM Re: Warped key bed
Bob Offline
3000 Post Club Member

Registered: 06/01/01
Posts: 3947
I can tell you what not to do - don't apply steam and weights in an attempt to warp it back - doesn't work!!!! How about planing the bottom of the key frame or adding shims to it so it matches the key bed??
_________________________
www.PianoTunerOrlando.com






Top
#620342 - 02/11/02 10:54 PM Re: Warped key bed
Christopher Stubbs Offline
Full Member

Registered: 12/20/01
Posts: 27
Loc: Wales, UK
Thanks Bob

Would you suggest using leather or wood shims? I just don't know about planing the key frame as it sounds somewhat irreversible.

Top
#620343 - 02/12/02 03:33 PM Re: Warped key bed
Brian Lawson, RPT Offline
500 Post Club Member

Registered: 07/04/01
Posts: 647
Loc: South Africa
Take off the action and keys, saw kerfs 3 into the keyframe one on top side and 2 under then fill the underside kerfs with wedges. As to where to make the kerfs you need to be a little more descriptive. Is the warp on the front rail (batt pin) or does it extend to the balance rail? If the keyframe is just place in, on the keybed and you tap it, where does it knock?

Basicly it wont be solved in two minutes but hope this gives you some data. Also, are the cheek blocks not doing anything?
_________________________
Brian Lawson, RPT
Johannesburg
South Africa

http://www.lawsonic.co.za

Top
#620344 - 02/15/02 03:24 PM Re: Warped key bed
Christopher Stubbs Offline
Full Member

Registered: 12/20/01
Posts: 27
Loc: Wales, UK
Brian,

Thanks for the reply and your suggestions, you speak of sawing kerfs on the top (sorry but not sure what you mean). The warp runs from the FT rail through to the BT rail and at the worst point covers the middle two octaves with a gap of 1cm, gradually diminishing (uniform) towards the end blocks. The idea of wedges is a good one, but please extrapolate on the use of wedges on the top of the rail, as this eludes me.
There is also a una corda so should the wedges be made of pine or beech? And how many wedges would you suggest?

Top
#620345 - 02/16/02 12:43 AM Re: Warped key bed
Brian Lawson, RPT Offline
500 Post Club Member

Registered: 07/04/01
Posts: 647
Loc: South Africa
A kerf is a saw cut, check it in the dictionary. I'm sure you must have seen such in other keyframes? One you leave open - on top, two below and either side of the one on top you wedge (with a hardwood)to force it to unbow. Although as you decribe a large bowing you may need several deep kerfs in the front and balance rail. An another thing, when you take the action stack off does the bow increase?
_________________________
Brian Lawson, RPT
Johannesburg
South Africa

http://www.lawsonic.co.za

Top
#620346 - 02/17/02 02:04 PM Re: Warped key bed
Christopher Stubbs Offline
Full Member

Registered: 12/20/01
Posts: 27
Loc: Wales, UK
What about inserting hardwood along the length of the keybed at FT, BR, & BT areas?
When the action is extracted there isn't any evidence that the warp is unstable but constant.

Top

Moderator:  Piano World 
(ad) Yamaha CP4 Rebate
Yamaha CP4 Rebate
Shop our Store for Music Lovers!
PianoSupplies.com is Piano World's Online Store
Please visit our store today.
Composer Statuettes
(ads) PD - WNG - MH
Wessell Nickel & Gross
(ad 125) Sweetwater - Digital Keyboards & Other Gear
Digital Pianos at Sweetwater
Ad (Seiler/Knabe)
Knabe Pianos
(125ad) Dampp Chaser
Dampp Chaser Piano Life Saver
New Topics - Multiple Forums
What is the age of this Estonia 165cm
by HoldenC
05/30/15 06:01 PM
Piano music video
by Josh Stefanski
05/30/15 04:46 PM
Midi connection between UA-55 and HP508
by Banzai_Ed
05/30/15 03:32 PM
Kawai es7 VS Roland FP80
by Pleumbluebeans
05/30/15 02:33 PM
Why does alfred's teach that the G chord is G7?
by bananasushi
05/30/15 01:13 PM
What's Hot!!
New Forum for Selling Your Products or Services
--------------------
Historic Piano Documents
--------------------
Posting Pictures on the Forums
-------------------
Forums Rules & Help
-------------------
ADVERTISE
on Piano World

The world's most popular piano web site.
-------------------
PIANO BOOKS
Forum Stats
79,471 Registered Members
44 Forums
164,448 Topics
2,412,585 Posts

Most users ever online: 15,252 @ 03/21/10 11:39 PM
Sheet Music Plus (125)
Sheet Music Plus Featured Sale

Visit our online store for gifts for music lovers

 
Help keep the forums up and running with a donation, any amount is appreciated!
Or by becoming a Subscribing member! Thank-you.
Donate   Subscribe
 
Our Piano Related Classified Ads
|
Dealers | Tuners | Lessons | Movers | Restorations | Pianos For Sale | Sell Your Piano |

Advertise on Piano World
| Subscribe | Piano World | PianoSupplies.com | Advertise on Piano World | Donate | Link to Us | Classifieds |
| |Contact | Privacy | Legal | About Us | Site Map | Free Newsletter | Press Room |


copyright 1997 - 2015 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission