[CAUT] Friday puzzler

[tannertuner]

Hi Paul,
I'm just curious. By chance did you remove neighboring keys, wips and hammers just to be absolutely certain nothing was rubbing on a neighbor? Which hammershanks did you use in the rebuild (I assume pre-84)? Hammers? anything to change the original ratio? Is there ANY vertigris in the original wips?
 
Any chance you bumped the balance rail bearing out of line when you added paper punchings to one of the neighboring sharps?  That could change the balance point in the key. And if the hole in the bearing isn't exactly centered and you inadvertantly turned it around that could change the balance of the key.  How about the balance rail bearings of neighboring keys? Could the key be rubbing on a neighboring bearing? This isn't something you normally look for and it may be completely far-fetched, but hey, nothing else evident seems to be the cause.
 
Good luck!
Jeff
 
 
 

--- On Mon, 6/28/10, Paul T Williams <pwilliams4 at unlnotes.unl.edu> wrote:


From: Paul T Williams <pwilliams4 at unlnotes.unl.edu>
Subject: Re: [CAUT] Friday puzzler
To: caut at ptg.org
Date: Monday, June 28, 2010, 9:41 AM


I removed one key lead and it now is working much better.   

I still don't understand why it was working until I took off the stack and then put it back on after raising the sharps a touch, checking the keys, lubing the key bushing cloths and balance rail cloths, polishing the front and bal. rail key pins, etc. You know, just general maintenance stuff.   

There was and still is, no debris, no tight centers, capstans good and polished (no burrs), wip cushions all good, hammers swing at 7, keys nice and free, no tight balance holes, pins not catching on fronts or backs of mortises, key dip remained at factory spec, key height factory specs (now including the sharps :>) ), rep springs weren't gunked up and are as strong as they should be, etc. 

I will blame it on little piano gremlins! 

Thanks for all the suggestions to check.  I learned a couple other things to look for next time something is wrong.  I have 8,800 other keys to play with!   

Best, 
Paul 
  






From: 
Paul T Williams <pwilliams4 at unlnotes.unl.edu> 

To: 
caut at ptg.org 

Date: 
06/27/2010 02:12 PM 

Subject: 
Re: [CAUT] Friday puzzler





Nope. 

I've tried switching wips, hammers.  Nothing is catching.  I didn't change anything else.  Just put the original wip back in just now and still no progress.  With hammers up and away.  I put in a new wip and it was worse. ???? 

I pushed down on the origianl wip and key and comparing it to a neighbor, properly regulated, it feels quite a bit heavier on the push, so Im getting closer. no prob on the mortises, key, balance, holes, jack cushion or any of that.  there are 4 leads in the front of the key, so maybe I should take out a lead.   

But WHY did this action behave before I took the stack off the first time to raise up all the sharps as they were too low?  This is a natural key which had nothing done other than raise up the blow distance a bit? Why I always get the weird stuff is beyond me! 

Looking for more input, please. 

Paul 










From: 
Jon Page <jonpage at comcast.net> 

To: 
caut at ptg.org 

Date: 
06/25/2010 07:28 PM 

Subject: 
Re: [CAUT] Friday puzzler






I've had this happen: Front rail pin contacting front edge of mortice.
That took a long while to track down. Now I always check it when a
key is sluggish for no apparent reason.
-- 

Regards,

Jon Page



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