Wim, Jim, Ron, List, For the record this is about a vertical Yamaha piano, not a grand piano. Today I tested a Yamaha U1, '70s' vintage, by removing the balance rail punching, and then by adding twice the thickness of the one in place. There is no change in lost motion that is measurable, or that would necessitate adjusting it. All that definitely changes is the height of the key in relation to its neighbors and the key dip in conjunction. Keith McGavern aka McChange Registered Piano Technician Oklahoma Chapter 731 Piano Technicians Guild USA >><<"The >>balance rail would have to move quite a bit for it to effect the capstan to >>the point that it creates, or eliminates lost motion. Or am I missing >>something?">> >>Wim >> >>Yep sho be doin jus dat. :-) >> >>a very small change in balance rail height will have an effect on hammer >>setting... on a >>vertical it very often leads to lost motion or to hammers standing off of >>the >>hammer rest rail......generally speaking, of course. :-) >>Jim Bryant (FL) > >... I would >find it hard to imagine a change in a vertical's balance rail height big >enough to necessitate capstan regulation, not being immediately noticeable >in key dip changes, even for a foot-handed clod like me. Of course, I'm >occasionally mistaken at ever shortening intervals. >Ron N
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