Ovr-Stke vs Undr-Stke (hamm filing question)

[KeyKat88 at aol.com]

Greetings,

        There is so much to learn!  Every time I think I have learned 
something, it turns out to have many more aspects to it.  (...great isn't it) 

Thanks
JUlia 
Reading PA

In a message dated 11/26/2006 5:21:09 PM Eastern Standard Time, 
Erwinspiano at aol.com writes:
HI Julia
  For a light filing, yes, you raise a practical issue.  There is of course a 
tolerance at which performance won't suffer  greatly.  It would be great if 
the fix were as simple as  a let--off adjustment but in order to maintain 
proper regulation/ i.e. blow distance .... hammer line needs to be raised as will 
the drop & let-off screw.  The magic line changes & the hammers now over center 
more as well. All the while the touch becoming lighter due to felt loss & 
geometry changes. It always Strikes me as such a sticky wicket. Don't you think? 
And then there's the scruffing scuffing hammer thing.
  Dale
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