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 (Piano Sing)
How to Make Your Piano Sing
(ad) Pearl River
Pearl River Pianos
(ad 125) Sweetwater - Digital Keyboards & Other Gear
Digital Pianos at Sweetwater
(ad) Pianoteq
(ad) P B Guide
Acoustic & Digital Piano Guide
Who's Online
150 registered (accordeur, Achilleas, anamnesis, ajames, 30 invisible), 1876 Guests and 29 Spiders online.
Key: Admin, Global Mod, Mod
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
(ad) Estonia Piano
Estonia Pianos
Topic Options
#2269181 - 04/30/14 05:28 PM What is the rest position of a hammer really?
malte Offline
Junior Member

Registered: 01/19/14
Posts: 8
If I strike a key so that the hammer checks and then release, then depending on how quickly I release the rest position of the hammer fluctuates by sometimes 2mm. I'm sure that the repetition spring is strong enough, although increasing its strength to unreasonable levels reduces the problem to less that 1mm fluctuation. Is this normal? If yes, how do I set the hammer height? If not, what else could cause this problem?

Best wishes!

Top
(ad PTG 757) The Value of PTG Membership
The Value of a PTG Membership
#2269224 - 04/30/14 06:49 PM Re: What is the rest position of a hammer really? [Re: malte]
Gene Nelson Offline
1000 Post Club Member

Registered: 09/10/04
Posts: 1530
Loc: Old Hangtown California
Wink the jacks while key is in the rest position. Should be just enough lost motion to allow the jack to reset when key is at rest and jack tail is slowly released. Don't let this lost motion get excessive.
_________________________
RPT
PTG Member

Top
#2269231 - 04/30/14 06:57 PM Re: What is the rest position of a hammer really? [Re: malte]
A454.7 Offline
1000 Post Club Member

Registered: 04/28/12
Posts: 1568
Loc: Manywheres
...wait, what now? Are you talking about an upright, or a grand?

It sounds like a grand...with the repetition lever set too high (i.e., in relation to the jack), and an inconsistent spring tension among the wippens. More info please...
_________________________
Masters degree in piano technology, +factory(s) training, etc., blah, blah, yada, yada, yada...[uncensored break-out in song]..."it don't mean a thing, if you aint got that swing."
--Klavierbaukuenstler des Erwachens--
Email: klavierbaukuenstler@gmail.com

Top
#2269291 - 04/30/14 09:12 PM Re: What is the rest position of a hammer really? [Re: malte]
Mark Cerisano, RPT Offline
1000 Post Club Member

Registered: 01/24/10
Posts: 1421
Loc: Montreal, Quebec, Canada
Why is this a problem?
_________________________
Mark Cerisano, RPT
www.howtotunepianos.com

Top
#2269331 - 04/30/14 10:33 PM Re: What is the rest position of a hammer really? [Re: malte]
BenP Offline
Full Member

Registered: 01/16/12
Posts: 166
Loc: South Jersey
There will always be some minimal variance in both the checking position and the rest position based on how hard you strike the key and how quickly you release it. I'm with Mark C - why is it a problem?


Edited by BenP (04/30/14 10:34 PM)
_________________________
Ben Patterson
Part-time Piano Tech
Rural South Jersey

Top
#2269430 - 05/01/14 04:41 AM Re: What is the rest position of a hammer really? [Re: malte]
malte Offline
Junior Member

Registered: 01/19/14
Posts: 8
Thank you for taking the time and: sorry, its a grand piano. Lost motion should be ok. If I slowly depress the jack tenders, the hammer barely moves. Sometimes I have the feeling that some hammers don't move up as much as they move down when I release the jack again.

This is a problem when setting hammer height. The hammer blow distance is, by definition, the distance between the hammer tips at rest position and the strings. But in my case, hammer height fluctuates depending on how I struck the keys prior to regulation...

@A443: I don't understand. How would the hammer height of a particular hammer be affected by different spring tension on the adjacent wippens?

Top
#2269444 - 05/01/14 05:45 AM Re: What is the rest position of a hammer really? [Re: malte]
A454.7 Offline
1000 Post Club Member

Registered: 04/28/12
Posts: 1568
Loc: Manywheres
no, not the adjacent wippen...

If your repetition spring is inconsistent (i.e., meaning, mainly weak) and the leaver is set too high, then you would get the situation that you are describing.

There could also be too much friction somewhere in the system.
_________________________
Masters degree in piano technology, +factory(s) training, etc., blah, blah, yada, yada, yada...[uncensored break-out in song]..."it don't mean a thing, if you aint got that swing."
--Klavierbaukuenstler des Erwachens--
Email: klavierbaukuenstler@gmail.com

Top
#2269446 - 05/01/14 05:52 AM Re: What is the rest position of a hammer really? [Re: malte]
A454.7 Offline
1000 Post Club Member

Registered: 04/28/12
Posts: 1568
Loc: Manywheres
regardless, no: it is not normal. You will find a problem somewhere

Check the hammer flange pining to see if it is too tight...
_________________________
Masters degree in piano technology, +factory(s) training, etc., blah, blah, yada, yada, yada...[uncensored break-out in song]..."it don't mean a thing, if you aint got that swing."
--Klavierbaukuenstler des Erwachens--
Email: klavierbaukuenstler@gmail.com

Top
#2269496 - 05/01/14 08:34 AM Re: What is the rest position of a hammer really? [Re: malte]
Olek Offline
7000 Post Club Member

Registered: 03/14/08
Posts: 7904
Loc: France
Friction plus whippen assist springs can easily create some unstable hammer rest posture.

The knuckle is supported by the lever and the jack, then the position of the jack and its shape on its top, can influence the hammer rest much.
_________________________
It is critical that you call your Senators and Representatives and ask them to cosponsor S. 2587 and H.R. 5052. Getting your legislators to cosponsor these bills


Top

Moderator:  Piano World 
What's Hot!!

Trade Regrets:
Barry "Bear" Arnaut

(ad) Yamaha CP Music Rest Promo
Yamaha CP Music Rest Promo
Ad (Seiler/Knabe)
Knabe Pianos
(ad) HAILUN Pianos
Hailun Pianos - Click for More
(125ad) Dampp Chaser
Dampp Chaser Piano Life Saver
(ad) Lindeblad Piano
Lindeblad Piano Restoration
(ad) Piano Music Sale - Dover Publications
Piano Music Sale
Sheet Music Plus (125)
Sheet Music Plus Featured Sale
New Topics - Multiple Forums
collard & collard
by Bob Newbie
27 minutes 55 seconds ago
What's your definition of music?
by juliantoha624
45 minutes 37 seconds ago
Korg SP250 internal speakers
by Kai C
54 minutes 39 seconds ago
Removing scratches from black piano
by pinkfloydhomer
Today at 02:12 PM
Pain at the shinbone/tibia
by Johan B
Today at 02:04 PM
Forum Stats
77041 Members
42 Forums
159346 Topics
2340708 Posts

Max Online: 15252 @ 03/21/10 11:39 PM
Gift Ideas for Music Lovers!
Find the Perfect Gift for the Music Lovers on your List!
Visit our online store today.

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 - 2014 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission