Fred and Alan, This could be another thread but here's my 2 cents... We find ourselves in situations sometimes when the rep spring lifts the hammer in a nice controlled motion upon release from the back check yet the jack still cannot be made to return under the knuckle... even to the point were the repetition lever height adjustment button is completely off it's rest pad to no avail. Repinning the rep lever can sometimes make this symptom disappear. Is this what you're referring to Fred? My take on it is that when this happens it indicates that the wire size of the repetition spring is to high so that when it even just starts to work it's already too tight after going just a little way into its arc, so it's kind of on the edge of starting to work.. switching to a smaller spring size will solve to problem or going with a heavier hammer... When the hammer weight and spring size is matched the rep lever will work with low friction. David Stanwood >Fred, > >By "pinning those reps heavy" do you mean tighter pinning? Can you >put a number on it, as in what do you aim for in pinning rep levers? >I know that some go for pinning reps at about 8g, but on nearly >every new set of wips I've encountered the reps are pinned in the >0-1g range, at least when I get them. I don't know what the >manufacturer aims for. > >Thanks. > >Alan > > >Certainly pinning those reps heavy makes it easy from the >technician's point of view, to set springs so the hammer rises >nicely in our artificial emulation. And I have found situations >where heavier pinning was necessary to get the jack to re-set under >the knuckle consistently.
This PTG archive page provided courtesy of Moy Piano Service, LLC