| Kenneth Michael Guitars est.1978 |
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| Top and Back brace vacuum clamp |
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| If you have an air compressor you need to build one of these. |
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| The best way to get a perfect bond when assembling contoured braces to the top and back of a guitar is to let the forces of nature help you out. As you can see by the photo the glue squeeze is absolutely uniform along the brace. The device that is going to be described is as simple as it looks --- do not try and over think it ----- it works great!!! |
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The base of the vacuum clamp is a 24 X 24 inch piece of ¾ MDF. It is not absolutely necessary but I put a few coats of satin poly finish on the top and edges. Sand out the finish to smooth out runs etc. A lot of the press bases I have seen are covered with plastic laminate and have an elaborate channel design routed ---- Forget that, it is a waste of time and $$$$. |
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| The vacuum source is connected to the base using a standard 1/4 “ air hose nipple. Drill an under size hole and just use the nipple to thread the hole. Remove the nipple apply some five-minute epoxy and replace the nipple --- make sure there is no epoxy blocking the airflow through the nipple |
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| The clamp is simply a MDF frame 24 X 24 with a cut out larger than the largest guitar we build, which is a J200. So our frame is approximately 11/2” wide all the way around --- ours has a fancy shape because I cut it on the CNC machine. Make sure you round over all the sharp edges. |
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| A piece of 10-mil vinyl is glued to the frame with Weld-On adhesive. Duco does not work! Yes -- I said 10-mil vinyl from JoAnn fabrics. The idea that some special rubber is needed is ludicrous. Professional wood workers that do veneering for a living have been using vinyl forever. Plus the vinyl is transparent so you can see if every thing is still in the proper location after applying the vacuum. When gluing to the frame do not stretch the vinyl – it is a good idea to stack a few pieces of wood inside the frame to create some relief when gluing. |
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| This is the clamping arrangement – spread the glue on the frame all the way to the outside edge, a little shy of the inside edge. Place the vinyl on the frame (trim to size after it dries). Flip it over - place it of the press base with the wood spacers as shown. Clamp the frame to the base all the way around |
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| You will need a roll of “m-d Building products” 5/16” x 23/64” “D” profile weather seal. The product # is 01025 black. I purchased mine from Home Depot $7.00. I experimented and the “D” shape seals the best. |
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| The weather seal in applied to the vinyl just inside the frame opening all the way around. Make sure the ends are cut square. Butt the ends together try not to stretch the seal. Glue the joint with a very small amount of thin CA (super glue) Do not use too much because that will make the joint stiff and it will not seal properly |
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| The vacuum source is a separate project and it is made using a kit from |
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| Joe Wood Worker Veneer Supplies |
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| The V2 Auto cycling venturi system is an exceptional system which costs a mere $150 to construct with about 1 ½ hours of labor |
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| This project is indeed as simple as it looks and is very cost effective. I’ll try and answer any questions regarding the clamp ---- Joe Wood Worker is a great guy and I am sure he will work with you regarding the vacuum source. Believe me it is very easy to construct. |
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