were talking, 2/7/96: >In order for David to have developed the problem he described >with his let off >rails, he had to significantly decrease >accerlation. This happened when the >capstans were moved in. >Dennis Johnson <<Your wrong here Dennis. The problem is in the stack configuration. It does not have to do with the capstan placement. For instance, if you would push the heel of the wippen up with your finger the letoff problem will still occur, not matter where on the bottom of the wippen you push on. David C. Stanwood>> Which makes me think of the M&H A LO rail which I had to move upwards by 3/16". But that was my fault. I ordered Renner's universal rep instead of the M&H rep, thinking that if I had to move the rep heel anyway, better to start with a rep body minus a heel. *Not* The universal rep's tender-fly angle on the jack was noticeably smaller than either the Renner M&H or the original WN&G reps (which were identical) . I had three choices: glue the LO button felt directly to the LO screw (& toss out the wood button), regulate for a 3/8" LO, or raise the LO rail. Maybe by the next time this situation ceoms up Renner USA will be offering universal reps in Steinway and M&H styl bodies. Dennis, What determines the location of a properly adjusted LO button is solely the position of the tender as it sits in the rep body, when the rep has lifted the hammer up to 1/16" from the string. How far the tender has to travel from its start at rest to this spot (where presumably you've put an LO button), may be a function of the overall leverage (which determines how much keydip you need for the given hammer blow). The respective leverages of the key and rep may also determine how much of a gap the tender has to close between its rest position and LO button, for the amount of dip determined above. But where the escapement starts really is a function of where the knuckle (and the partner fly) sits when the hammer is 1/16" from strike, and what the jack's leverage and angle are. The key and rep leverages (with the jack leverage) might figure into the amount of dip necessary for the jack to trip out, and they will figure into how far the tender has to travel to reach the LO button. But how far or how fast the tender has to travel has little to do with where the LO button wants to be located. (Golly, what am I going to do with all these split hairs. make an afghan with them?) Bill Ballard RPT NH Chapter, PTG "There are fifty ways to screw up on this job. If you can think of twenty of them, you're a genius......and you aint no genius" Mickey Rourke to William Hurt, in "Body Heat", discussing arson.
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