jack not returning on high treble

[David Ilvedson]

The dampers help return action parts to rest...not their design necessarily...you will need to get the dip the same and probably need a slight bit of lost motion...adjust and cycle action slowly to see that jack returns.   Of course you have flicked jacks to make sure the jack spring is strong enough or jack center isn't tight



David Ilvedson, RPT

Pacifica, CA 94044









Original message

From: "Michelle Smith" 

To: "Pianotech List" 

Received: 1/23/2007 8:09:49 PM

Subject: jack not returning on high treble





Hi everyone.  I briefly worked on a drop action piano today (the type with capstans and inverted stickers instead of lifter wires and grommets) that the jacks would not return after the initial strike.  We see it every day, right?  Well, I did a multitude of tests to see if it was a friction issue.  It wasn’t.  I didn’t have a lot of time to make adjustments (I was there to work on a different piano) but here are two facts to ponder.  First, it was ONLY the notes that do not have dampers (the extreme treble).  Second, the dip on these notes was slightly less than the rest of the piano, otherwise, all measurements were the same.



Thanks for helping the eternal newbie.  =)



Michelle Smith

Bastrop, Texas 
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