This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment I don't know about the question...but your business should be "Tunasaur= us Rex"....;-] David Ilvedson, RPT Pacifica, California Original message From: Teslaspark@aol.com To: pianotech@ptg.org Received: 3/1/2006 8:14:51 AM Subject: Upright Action mounting pins Hi, group! My name is Rex Burrus from Chicago and I'm new to the list and recently= new to piano technology having been indoctrinated by classes of a loca= l mentor and taken under the wings of the Chicago PTG chapter early in = 2005. I've been tuning mainly, but also work the technology angle of p= ianos, plus work on players for all of one year now. Now for my juicy question du jur... I have on two occasions come to wonder about action mounting in an upri= ght. In both cases, I have found the action to be somewhat ajar and no= t even settled upon the mounting pins in the keybed which have made the= se pianos play lousy. The one piano was completely cured simply by rep= ositioning the action properly and the customer was so overjoyed that I= made extra money on that tuning. On my current project, I found that = the action is not properly resting on all the mounting pins. In fact t= he middle two pins are not even in contact with the wells in the action= supports. These pins are threaded and squared so that turning them mo= ves the mounting pins up and down in the keybed. I suspect that at ano= ther time, some "tooner" ran into trouble seating the action and at a m= inimum raised the treble end as the treble hammers were striking the v-= bar and making no sound. So, minimally, I'll lower the far upper mount= ing pin and this should cause all mountings to fall into proper alignme= nt. Intellectually, I'm wondering overall what any procedure might be = to precisely locate an action using these mounting pins. I understand = that raising or lowering the action changes the striking point of the h= ammers on the speaking length of the wires, so I'm curious as to how th= e striking point is found or if there are any good references on this, = and what might be a proper procedure for adjusting (regulating?) the mo= unting pins in the keybed of an upright? Is this a factory only adjust= ment? Thanx! PIANO TUNING by REX! Repairs and adjustments, also. (708) 418-0750 teslaspark@aol.com ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/a0/09/5b/b8/attachment.htm ---------------------- multipart/alternative attachment--
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