"key bounce"

[David Chadwick]

Greetings, 
Wouldn't part of the problem be at the balance rail? It seems to me that a proper adjustment of the balance rail glide bolts would be the first thing I would look into. Then, I'd make sure that the Balance pin hole in the key is has no slop in it. Too many times I've seen over sized holes as some think it's OK to have the key so loose around the pin so you can lift the key at the front so it drops without any friction. That's OK if your traveling the key parallel to the frame but forcing up in an arc does not give proper measurements for rocker function. If easing is needed I always ream the hole side to side... not front to back. Why would the manufacture over weigh the keystick so much? If your touch can detect it than I would definitely look into the key bedding situation

Some interesting answers on this subject! Just my two cents

David Chadwick
Las Vegas



What causes a key to "bounce"? In that, when the key is pressed and 
> then it returns there is a little bounce up and down. What can be
> done to minimize this? 
  ----- Original Message ----- 
  From: Joe And Penny Goss 
  To: mjmccoy at usa.com ; Pianotech List 
  Sent: Thursday, June 01, 2006 10:12 AM
  Subject: Re: "key bounce"


  Hi Mike,
  Two questions 
  1. Do they bounce equally as bad with the dampers on as off the strings.
  1. Where is the lead? In front or behind the balance rail pin?

  Joe Goss RPT
  Mother Goose Tools
  imatunr at srvinet.com
  www.mothergoosetools.com
    ----- Original Message ----- 
    From: Mike McCoy 
    To: Cy Shuster ; Pianotech List 
    Sent: Thursday, June 01, 2006 9:57 AM
    Subject: Re: "key bounce"


    I just had the same issue with a 1930's Baldwin grand. The keys bounce after you let go and you can feel it in your fingers when playing. Nothing worked, including backrail cloth and it did have a ton of lead in the keys. Someone in my Chapter  suggested the wip cushions may be too hard, and they were. I turned the stack over and steamed them and it removed the dimples and softened them up. It did help noticeably but the problem is still there.

    Mike


    Mike McCoy

    Cy Shuster wrote: 
      Could new back rail cloth help prevent bounce?  I'm thinking that worn cloth would be like bouncing right off the wood, where new cloth would give more cushioning...

      --Cy--
      shusterpiano.com
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