Dale Erwin wrote: > "I went to the trouble of making an air hose press to do the glue up." Dale, Dale, Dale - VACUUM!!!!!! WOW, that is quite an impressive array of hoses, but a very simple vacuum-bag system works at least as well - perfectly even pressure over the entire surface. I use a little pump that maybe cost me $200 or so and I had a bag made for me about five-feet by two-feet or so for all my rib laminating and pinblock capping. It is low-cost and works great. I'm sure your air-hose thing works well, but for others considering doing something of this nature, IMHO, vacuum bagging is much easier and low cost. Terry Farrell On Feb 17, 2010, at 9:19 PM, erwinspiano at aol.com wrote: > > > Hi Gene > Well every one was doing it. No, no, no... I owe TerryFarrell > the thanks for motivation as he made me one of the quarter sawn > versions and it tuned so well I was duly impressed... and the > Canadian Double blocks were getting so spensive!. I wasn't always > satisfied with the fit either. And Why not keep the money in the shop? > I wanted a more consistent block that tunes like a Yamaha. I > despise tight pins and wanted to gain control over the process. I > have used both the delignit block material and the bridge cap > material. Both are just fine. The bridge cap material is about twice > as many laminations which I like but it doesn't come in a long > enough sheet to cover the length of an entire block So the seam is > placed between the tenor and bass tuning pin fields.When I run out > of the block material I may try that again. > The added bonus of a block that solve pin hole enlargement over > time was a great feature. In many blocks the pin holes are > dangerously close to the block edge especially in the bass. > I buy and machine my maple. I'm very fussy about the grain > consistency. I can get 8 or 4 quarter that has very tight and > consistency grain. Much more so than what I was buying but that's > always the value added feature of any customized work .I have found > it about impossible to buy or order wider quartered material and > although it may sound like too much trouble I can usually machine > enough material for glue into up in double panels ready for pressing > in about 4 hours. I made shop built clamps to edge glue the material > I have not altered the drilling technique. It is however important > as Terry said to test each block with test pins. Maple varies in > hardness and some no. 2 pins will be too tight drilled at .257 and > others better at .261. > I went to the trouble of making an air hose press to do the glue > up. It's been stiffened a time or two and now glues a really flat > panel. Quite a learning curve doing it my way. > Is it worth it? > > The outcome is far better than I hoped. Love tuning these blocks-- > Dale > <pinblock.jpeg> > > > > Hello, > I am very curious about hybrid pinblocks and those that have made > and used them. > What materials were used, how did you decide on the materails and > their proportions. > What was the intended purpose and did you achieve the desired result? > Did you alter your drilling technique for the hybrid? > Overall, do you think the extra work was worth it? > Do you use a bandsaw to fillet the different blocks and what size is > it - virticle capacity for cutting. > Thanks for sharing your thoughts. > Gene > > <pinblock_press_1.JPG><pinblock_press_2.JPG> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100217/e30b1319/attachment.htm>
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