37 steps---delayed response

[Roger Jolly]

Hi Israel,
                  On the subject of springs. One 
of the most common causes of unstable regulation, 
is the friction in the spring grub slot.   I 
can't count the number of times that cleaning the 
spring tips and lubricating the slots, has 
changed the regulation dramatically.   Some times 
for the better, and some times it will make the 
springs kick like a mule.  The more I think about 
it, the more I realize that I either service the 
springs, or ball park adjust them first, or very 
early in the regulation process.
This action will also change let off, and most 
other regulation parameters.  In extreme cases, ( 
1920's Steinway's with Tallow in the grub 
slot)  you will find that you will need to change 
the dip (after touch) after you clean the slot and tips.

Regards Roger



At 10:23 PM 06/02/2008, you wrote:
>At 09:43 PM 2/4/2008, Larry Trischetta wrote:
>
>> >>DO THE SPRING STRENGTH FIRST, AND PRECISELY
>>
>>The spring tension will change to some degree 
>>(sometimes a lot) when the other regulation 
>>points are done, therefore it is impossible to 
>>adjust the strength precisely on the FIRST pass.
>
>Then, I might also add, that it's impossible to 
>do springs - precisely or otherwise - before 
>getting the backchecks fairly close, because 
>backcheck regulation affects spring compression 
>- and therefore the speed at which the hammer 
>"jumps" when you test the springs. If backchecks 
>aren't at least close to where they ought to be 
>- you will be getting a false reading on how 
>strong the springs really are. The gist of all 
>this is that you pretty much have to get all 
>your regulation points or functions "in the 
>ballpark" before attempting to regulate anything 
>precisely. It's sort of like doing a pitch raise before fine-tuning.
>
>What you write below, Larry, is probably one of 
>the best statements of how regulation actually works that I have seen.
>
>Israel Stein
>
>>Most of the regulation points except let-off 
>>will change, even if it is a small amount, 
>>after other points are tackled. Thus the 
>>“rounds of regulation”. But it is true that the 
>>spring tension should be either after blow 
>>distance or not far behind. Let off can come 
>>before spring tension. The 37 steps are just 
>>that
 steps
 but not the process as a whole. 
>>You will be going up a few steps and  then back 
>>down a few more and so on
 you’ll be running up 
>>and down the staircase a number of times, until 
>>every point is in harmony with what the 
>>technician KNOWS is supposed to happen. Without 
>>that knowledge of what is supposed to happen, 
>>all you’re doing is following steps in sequence 
>>and crossing your fingers at the end of the 
>>last step. The concept of what is actually 
>>happening when you change a point of regulation is imperative.
>>Larry Trischetta
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