No capstans?

[Tom Driscoll]

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-----Original Message-----
From: owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org] On Behalf
Of Billbrpt@AOL.COM
Sent: Sunday, August 11, 2002 12:11 AM
To: pianotech@ptg.org
Subject: Re: No capstans?

 


While those rocker type capstans are adjustable, it is difficult and you
don't want to do anything but make a slight adjustment.  Really, the
same should go for any other type of capstan.  Check the back rail
cloth.  It is likely to be in poor condition.  Replacing it with the
right thickness cloth will largely take up the lost motion if there is a
lot of it. 

If it is in good condition, you can shim that cloth until you have your
lost motion generally taken up.  Remember, that cloth should only be
glued with a bead of glue at the back end so that some veneer or thin
cardboard can be used to shim it to the proper height.  If you don't
have different thicknesses of cloth available, use whatever you have, so
long as it is not too thick.  Then, use shims to take up the rest of the
space.  This should allow you to make a precise adjustment with only
slight turn to the screws rather than major cranking. <SNIP> 

 
Good luck, 

Bill Bremmer RPT 
Madison, Wisconsin 
Click here: -=w w w . b i l l b r e m m e <http://www.billbremmer.com/>
r . c o m =- 

             

            Bill I agree with your point about the back rail cloth
possibly being worn, and also about using only a bead of glue, but don't
you mean to glue the front edge? That is the edge closest to the front
of the keybed? I see strips of cardstock or bushing cloth used as shims
and it is indeed a good way to get closer to your target adjustment. 

            Terry, Wait till you see the actions with the stickers
pinned to the rockers . Now that's a real joy !

            Tom Driscoll


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