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Jack to Knuckle Alignment
by Paul Eccardt, Chapter President

The jack to knuckle alignment is a very important part of regulating that shouldn't be overlooked. The correct way of adjusting them is to set the backs of the jacks in line with the back wood lines of the knuckles. They can be adjusted differently for different situations. If a customer wants a heavier feel, you can put the jacks farther under the knuckles. This will give you more friction and less repetition. If you cheat the jacks out a little bit, you will get more repetition and a lighter feel. I found that most pianists like the jacks set correctly or cheated only slightly. If you are using new wippens, you should cheat them out a little to compensate for the felt compressing on the ends of the regulating buttons. When adjusting them, it is important to have good lighting, and a low work bench. Be sure to keep your head at the same angle and the same distance from each jack. If the angle or distance changes, you won't get an accurate read on them. After making the adjustment, make sure your tool is completely off the regulating screw before you check to see if your adjustment worked.


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