[CAUT] Action spread

[Tim Coates]

Hi Paul,

114mm is too much yes.  Should be closer to what Jon suggests.

Tim Coates

On Jul 14, 2009, at 7:05 AM, Paul T Williams wrote:

>
> This action has a 114mm spread.  Too much??  I can get clearance on  
> both sides of the jack, however.  I won't know how it really  
> regulates until I'm finished re-stringing.  This was just a bench- 
> guesstimate.
>
>
> "Mccoy, Alan" <amccoy at ewu.edu>
> Sent by: caut-bounces at ptg.org
> 07/13/2009 06:48 PM
> Please respond to
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> Subject
> Re: [CAUT] Action spread
>
>
>
>
>
> Paul,
>
> I do believe that M&H have a spread spec more than 4.406 (4 13/32).  
> If you set it at 112.5mm as Jon suggests, that  converts to 4.429”  
> which is closer to what Masons need. But really you can figure this  
> out by regulating a couple notes and see how far the jack moves. If  
> at full dip (use 10mm as a ballpark) you get good clearance at the  
> back of the jack with the knuckle, and good clearance at the front  
> of the jack with the window felt, then your spread spec will work.
>
> Alan
>
>
> From: Paul T Williams <pwilliams4 at unlnotes.unl.edu>
> Reply-To: CAUTlist <caut at ptg.org>
> Date: Sat, 11 Jul 2009 12:33:53 -0700
> To: CAUTlist <caut at ptg.org>
> Subject: Re: [CAUT] Action spread
>
>
> That's exactly how I line up the knukle jack relationship. back of  
> the knuckle core with the jack.  Too far forward and you get the  
> "cheating" jacks.  Too far back, and the touch gets a little heavier  
> and aftertouch is compromised.  I really don't want to move the  
> stack.  Or move the capstans unless absolutely needed.  But, the DW  
> is well over 55g in the mid-section on up, 60+g in the bass, and  
> nothing really gets any better. The back action is also really heavy  
> "to the touch" but can't justify spending more on this thing since  
> it's just a practice piano, yet I want the instrument to be pleasant  
> for the student.
>
> How much can one move an action one way or another, back or forward  
> to get a better geometry.  The "line" of the relationship to the  
> wippen-flange, capstan and balance rail on my particular M&H is  
> actually quite good.  Perhaps I put too heavy of hammers on it! ?   
> I'm not sure yet until diving in further...This piano has the tilted  
> capstan issue from the '20's, so perhaps that part of the problem on  
> this A.  Would "modernizing" the capstans to upright be a good  
> thought?
>
> I'm just starting the re-stinging part, so can't do too much with  
> the action as it sits.  Man...I'm not a fan of restringing a  
> M&H....one single string...then one double...then one single string,  
> then one double.  It's a lot of time!!! I'd rather have the single  
> strings all the way! :>) (or double..."normal" way with just a  
> couple of singles)  Hitch-pin loop knots on 20g wire is nasty!!   
> I'll think twice before I take on the one piano next door!! :>)
>
> I really didn't wish a huge project, but now fear the worst.
>
> Thanks for all the input.
>
> Paul
>
>
>
> PAULREVENKOJONES at aol.com
> Sent by: caut-bounces at ptg.org 07/10/2009 11:03 PM
> Please respond to
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> caut at ptg.org
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> Re: [CAUT] Action spread
>
>
>
>
> Hmm, I'll take a look at that. In my mind's eye, it sounds the same  
> as what I was suggesting, but might be more precise. Thanks.
>
> Paul
>
> In a message dated 7/10/2009 6:36:56 P.M. Central Daylight Time, jonpage at comcast.net 
>  writes:
> I know what you are trying to say, but is this unclear? Generally,  
> don't we
> want the back of the jack to line up with the back of the spline of  
> the knuckle?
>
> But  optimally you want the core
> of the knuckle to line up with the jack center  at rest.
>
> Knuckle core to align with the jack center pin.
> -- 
>
>
> Regards,
>
> Jon Page
>
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