While regulating 4 year old Steinway Model B's (Hamburg), we noticed that sometimes simply moving the spring back and forth in the groove (without removing or changing the tension in any way) was causing hammers to rise from check more quickly. Anyone else ever notice this? It would appear that there can be enough buildup of lubricant (in the form of a channel that the spring has to move through) as to create some drag. As further evidence for this explanation, I noticed that when I pushed down slightly on the lever as well (while moving the spring back and forth) the hammers rose slightly faster yet; pushing the lever enabled the spring to smooth off the entire length of the channel. Hard to believe that small amount of gunk could cause noticeable results, but apparently so. These two aren't of the same lever, but will make the before-and- after point intended. I took some shots (which I can't seem to find) which showed an even more impressive trough of graphite - especially when zoomed. Let's hear it for the closeup digital photography we all have access to now - it really becomes a sort of substitute microscope. I wonder if permalon (sp?) - the green stuff - might in fact be better, because it's harder? Allen Wright -------------- next part -------------- A non-text attachment was scrubbed... Name: Showing Ridged Groove, First Camera.jpg Type: image/jpeg Size: 102562 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100730/68c60072/attachment-0002.jpg> -------------- next part -------------- Showing Ridged Groove -------------- next part -------------- A non-text attachment was scrubbed... Name: Showing Ridged Groove After Spring Was Moved Side To Side.jpg Type: image/jpeg Size: 101803 bytes Desc: not available URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100730/68c60072/attachment-0003.jpg> -------------- next part -------------- Showing Ridged Groove After Spring Was Moved Side To Side
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