This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment ----- Original Message -----=20 From: Greg Newell=20 To: pianotech@ptg.org=20 Sent: January 14, 2002 2:50 PM Subject: Re: my own Soundboard Oh Del, do elucidate before I mercilessly butcher some poor = unsuspecting tree. ;-) Seriously, I don't want to waste wood. What will = happen with a finger joint in Sitka. BTW where can I get some Sitka?=20 Greg=20 If you're considering fingerjoints to butt two pieces of the stuff = together the right type of finger joint will work. But I assume you're = talking about edge gluing here.=20 Sitka spruce is pretty nasty stuff to machine cleanly when you get down = to small thicknesses and shapes. With any edge shape as extreme as a = fingerjoint of normal slope would result in the wood peeling, stripping = out, compressing, breaking off, and otherwise generally = self-destructing. And jointing of this type is also unnecessary. The flat edge gluing = (assuming properly prepared surfaces) of vertical grain boards is about = as strong a joint as you're going to get. Using any reasonable adhesive = the flat face-to-face joint is going to be stronger than the wood = itself. So, any shape you use is going to be there for other reasons. In = this case it is for board alignment. These are pretty long boards to = work with and we're trying to edge-glue a fairly large panel here. The = joint shape--of whatever type--is there only to aid us in aligning the = boards so that we can use thinner stock at the time of lay-up leaving us = with less to thickness plane and/or sand away. The biggest problem with any joint shape is that when we thin out the = edges (assuming this is done in some area, usually around the bass end = of the board) and cut into the joint shape the glueline takes a twist. = If the edge shape is abrupt this can be some unsightly. Del ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/a0/ba/b7/8b/attachment.htm ---------------------- multipart/alternative attachment--
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