> Gene Nelson wrote: >> The simple test we did I cannot really draw any definite conclusions from >> however, if you pound a pin down a bit in the old clunker, the bottom of >> the pin engages fresh fibers and gives more torque? > > Unfortunately, that doesn't make a lot of sense either. Lots of years > back, someone on list pointed out that tapping a pin less than a > millimeter deeper into the block often makes way more torque difference > than is reasonable for the "fresh wood" presumption. I think it was a good > observation. ***Did the poster give an explaination? >> Also, one thing I missed was that our eval was turning the pin just to >> break the initial friction similar to tuning. As Ron pointed out there is >> the additional friction as the pin continues to rotate where the >> differences in materials plays a roll. > > Or a muffin. (sorry) Another thing: I've noticed that pin torques two or > three days after stringing feel higher than when you're installing them. > This may be a body calibration illusion relative to the different levels > of violence imparted whether stringing or tuning, and I've never taken > actual measurements, but it's worth a look. How do those test piece > torques match up today? ***I believe that the guys in the shop would not agree that this effect is an illusion. Actually, it was suggested that we give it a week for the fibers to respond, regroup or whatever they do after recieving a tuning pin. Will not know anything till tomorrow at least. We are avoiding the purchase of a torque wrench that is sensitive enough for a reasonably accurate measurement but I think the feel is good enough for me. Cannot see any good reason to get too scientific. Gene > Ron N
This PTG archive page provided courtesy of Moy Piano Service, LLC