Damper guide easing

[Carl Meyer]

Roger

I'm looking forward to meeting you at Reno.  Always wanted to know what a
guy who loves damper work looks like.

Carl Meyer

----- Original Message -----
From: "jolly roger" <baldyam@sk.sympatico.ca>
To: <pianotech@ptg.org>
Sent: Monday, May 21, 2001 11:17 AM
Subject: Re: Damper guide easing


>
> >   It is also possible that the wire is not traveling straight through
the
> >axis of the guide bushing. (See the Jolly article inre dampers and their
> >wires, Roger has a good perspective on this bit of geometry!)_
> >Regards,
> >Ed Foote RPT
> >
> Hi Ed,
>            Thank's for the compliment, one remark like that makes the
> efforts worth while.
> With regard to reaming bushings.  I will make some general statements.
> 1. Techs are too quick to ream the bushing, or bend the wires by the guess
> and stab method.( Bin thar, done that, and bought the Tee shirt.)
> 2.  Fix your thinking to clean vertical movements.
> 3.  Analyze and trouble shoot the real cause of the problem.
>
> Now to trouble shoot the problem.
>
> 1. Remove the damper. I use a mute between the dag and lift tray so the
> damper will go back in with the same  timing.
> 2. Use the end of the damper wire to verify if the bushing is tight.  If
it
> is , heat the end of the wire with a Bic lighter and  burnish the bushing
> cloth, polish the bushing cloth area of the wire.  Reinstall and check the
> operation. If it was the bushing, it will be free.
> 3. If the damper is still sluggish. Lay the side of the damper block
firmly
> on the stretcher, and check for all planes to be parallel with the
> stretcher. But money this will show a problem. Yes that easy.Now you can
> bend the wire to correct. Next sit the damper felt on the stretcher and
> check the wire is plumb front to back. Flex the wire to make it square.
> 4. Reinstall the damper, making sure that the wire slides easily into the
> lifter,, and that the lifter is parallel with the wire. If it is not, bend
> to correct. Remember to bend twice. Once to move the wire over, then to
> bring every thing back to parallel. Rotating the flange can be the oft
over
> looked caused.
> 5. Once the wire/ guide relationship is clean now start the bends at the
> head, same double bending technique.
> .
> Hope this is helpful. A bit short. It's 6 chapters in the Journal.
>
> THINK YOUR WAY through the problem.  Don't stab.  I love damper work.  <G>
> A converted stab in the dark artist.
> Regards Roger
>
>