S&S: key-frame return spring

[Mark Cramer]

Hi Dan,
I had polished the spring after sanding the edges with a fine paper to
de-burr.  It was the spring groaning at the point when the frame had almost
reached end of travel, and again upon release of the pedal.

Forgot to mention I had put DAG on both the spring and key-frame, its the
polished graphite against polished graphite (I believe) made things worse.

Mark

-----Original Message-----
From: owner-caut@ptg.org [mailto:owner-caut@ptg.org]On Behalf Of
thepianoarts
Sent: Tuesday, November 21, 2000 8:44 PM
To: caut@ptg.org
Subject: Re: S&S: key-frame return spring


Hi Mark,

I am sure you have located the source correctly, but after much trial and
error, mostly error, I now treat the back verticle edge of the key frame
where it could touch the dags, etc. Sanding would work too. It is a tough
one (noise) to trace, but common.

Just courious...
Was the spring singing, or the wood frame resonating? (How about polishing
the spring?)

Dan Reed
Dallas