Your inaccuracy could very well be caused by clamping the side of the key against the 90 deg fence. This invites the problem you are experiencing, because the sides of the key are not milled carefully 90deg to the key bottom. When the key is cut during fabrication the side of the key is not a trustworthy 90 deg to the key bottom, rather it is a randomly somewhat near 90degrees. By clamping the key to a side fence, you bypass the key bottom and use the random side as your index. The way I approach it, the only surface on the key which is a trustworthy index is the bottom of the key...no secondary references, they only introduce inaccuracy. Even if your base is dead parallel to the router runners, and your key bottom has no protrusions, when you clamp the side you bypass the bottom index and make the side of the key the index surface. Jim I On Sat, Jan 2, 2010 at 6:57 PM, Greg Newell <gnewell at ameritech.net> wrote: > I’ve done all this that you suggest except replace the rubber button from > the toggle clamp. I’ve considered it before. Perhaps next set I’ll do that > to give it a try. Have tried more clamp pressure, less clamp pressure, > definitely parallel rails to platform. I remade that part twice now with > different materials. I replaced the right angle piece that supports the side > of the key with a heavy angle iron. Last effort frustrated me enough to send > me out and get the rotary planer. I’d really like to get this set up to work > though as it’s rather fast when it works. I hate key work too. I got into it > out of necessity though. The last set I sent out came back with 2 broken > keysticks. > > > > Greg Newell > > Greg's Piano Forté > > www.gregspianoforte.com > > 216-226-3791 (office) > > 216-470-8634 (mobile) > > http://www.wealthyaffiliate.com?a_aid=NNaYfMKd<http://www.wealthyaffiliate.com/?a_aid=NNaYfMKd> > > > > *From:* pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] *On > Behalf Of *David Love > *Sent:* Saturday, January 02, 2010 6:46 PM > > *To:* pianotech at ptg.org > *Subject:* Re: [pianotech] Key wood prep....was....Applying PVC-E > > > > First make sure that it was set up right and that the guides are parallel > to the key platform. You have to adjust the clamp tension just right so > that it holds things in place but doesn’t push the key over on its side a > bit. Too much tension there can create a problem. Of course, not enough > and it can move but it doesn’t really take that much to hold it in place > since you’re not usually taking off very much material. You might consider > replacing the rubber bumper on the clamp with something slightly firmer. Be > sure that you don’t have a key bushing protruding beyond the bottom level of > the key so it can’t sit flat on the platform. I tend to do this operation > after I’ve removed the old bushing but before I’ve put in the new ones. > Bottom line, I hate key work. > > > > David Love > > www.davidlovepianos.com > > > > *From:* pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] *On > Behalf Of *Greg Newell > *Sent:* Saturday, January 02, 2010 3:16 PM > *To:* pianotech at ptg.org > *Subject:* Re: [pianotech] Key wood prep....was....Applying PVC-E > > > > David, > > I have one of these and find it horrible to work with. I > consistently get a slanted top after running the router over the keytop. Any > ideas as to what my problem might be? Ugh, perhaps that’s too open ended. > Any guess as to what I might be doing wrong with this set up? Thanks! > > > > Greg Newell > > Greg's Piano Forté > > www.gregspianoforte.com > > 216-226-3791 (office) > > 216-470-8634 (mobile) > > http://www.wealthyaffiliate.com?a_aid=NNaYfMKd<http://www.wealthyaffiliate.com/?a_aid=NNaYfMKd> > > > > *From:* pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] *On > Behalf Of *David Love > *Sent:* Friday, January 01, 2010 10:15 PM > *To:* pianotech at ptg.org > *Subject:* Re: [pianotech] Key wood prep....was....Applying PVC-E > > > > I use this set up with a router. Just the router base is pictured but you > adjust the router in the base to get the depth of cut you want. > > > > David Love > > www.davidlovepianos.com > > > > *From:* pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] *On > Behalf Of *erwinspiano at aol.com > *Sent:* Friday, January 01, 2010 5:59 PM > *To:* pianotech at ptg.org > *Subject:* Re: [pianotech] Key wood prep....was....Applying PVC-E > > > > > > On a different subject, how do all of you mill and prepare the top of the > key prior to gluing on tops. > > > > Dale Erwin > > * * > -- grandpianosolutions.com (under construction) Shirley, MA (978) 425-9026 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100102/a01d947d/attachment-0001.htm>
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