Speaking of Springtime .... I sure hope Algore solves this global warming "problem" before we all freeze to death here in the Midwest. Alan Barnard Salem, MO ----- Original message ---------------------------------------- From: "Jon Page" <jonpage at comcast.net> To: pianotech at ptg.org Received: 4/16/2008 10:27:57 AM Subject: Spring Time >I finally received some phosphor-bronze spring wire: .022, .028, .032. >I made a few springs by hand with a hinge pin mounted in a vise to form >the coil but am interested in what is a suitable spring making tool. Possibly >the one listed in the Schaff catalogue or someone's fabrication. Ideas? Pix?? >The springs I made are for a back action underlever assist. >I made 16 of .032 for the lowest ones and 8 of .022 for the highest. >The supplied springs (.026) always seemed a little strained on the lower >end so I made springs with a heavier gage. I like to set the tension lighter >at the high end of the spring section so as not to have a large weight change >at the transition to non-assisted underlevers and the lighter gage allows >for a firmer/positive positioning in the slot while offering less force. >Also, I'll be making different wippen assist springs. The arm which attaches >to the loop is too short and strained at rest. I've done some experimentation >and found that a longer arm has a more fluid feel to it's affect and there is >less of a tension change from rest to full key stroke. And according to >Ron O, they need an extra coil. I have a S&S M in the shop which I'll be >needing a spring making tool to do just this. >-- >Regards, >Jon Page
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