knloregon Posted September 18, 2012 Report Share Posted September 18, 2012 Such beautiful precision, Carl ~ ! --- love this great unfolding story... Link to comment
warpedbored Posted September 25, 2012 Author Report Share Posted September 25, 2012 Although I am ready to glue the top on I decided to take a break from that on my days off this week. Since I'm going to need it soon anyway I decided to build what I hope is the last major jig for guitar building. The binding jig. As I'm sure those of you who have followed this blog remember me saying an acoustic guitar top and back are not flat. They are a dome. The top has a 28 foot radius and the back has a 15 foot radius. To compound that the back is about an inch higher at the tail than it is the neck. This makes it impractical to use a router resting on the top or backto cut the binding channel for the binding and purfling since you can't hold it straight up and down in relation to the sides. The solution is a jig that holds the router straight up and down as it goes around the sides. There are several variations of these jigs. One of the simplest is one where the router just goes straight up and down while you spin the guitar body mounted in a carriage underneath it. I didn't think much of this type since I would need to control the router with one hand and spin the guitar with the other. I settled on a parallelogram type that goes around the guitar. I scoured the internet looking for plans and while I could find lots of photos the only plans I could find were for sale for $25.00. Being the king of cheap as well as not wanting to wait for them to arrive I fired up my CAD program and figured it out myself from the photos. It took me most of yesterday and part of today to figure out all the details but I finally got them drawn. Today I got all the parts cut out and I'm ready to assemble it. Here are some photos of what it will look like when it's finished. I'll post some more photos when it's done. http://www.dewguitars.com/Images/trim_ledge_02.JPG http://www.dewguitars.com/Images/trim%20ledge_03.JPG Link to comment
warpedbored Posted October 2, 2012 Author Report Share Posted October 2, 2012 I finished the contraption today I made an improvement on the one in the photo above by adding a spring to hold the router up if I let go of it. All in all I'm pleased with the results. http://oi47.tinypic.com/2e4jdwm.jpg Link to comment
knloregon Posted October 4, 2012 Report Share Posted October 4, 2012 Wow ~ ! Carl, "one step for man... ' you really are doing great prototype work here ! ---- Kim Link to comment
warpedbored Posted October 9, 2012 Author Report Share Posted October 9, 2012 I finished the rest of the contraption today. The carriage that holds the guitar straight up and down while cutting the binding channel.http://oi48.tinypic.com/rjijjk.jpg http://oi46.tinypic.com/312hkr4.jpg Link to comment
chilton747 Posted October 9, 2012 Report Share Posted October 9, 2012 That's a mighty fancy contraption you got there Carl. Is it all freehand or can you set the pattern? Link to comment
warpedbored Posted October 9, 2012 Author Report Share Posted October 9, 2012 The guitar body is the pattern. The router bit used to cut the binding channel has a bearing on it that controls the depth of cut. The contraption holds the router straight up and down as you go around the body. If you just put a router on the top it wouldn't cut straight into the sides because the top and back are a dome. Link to comment
knloregon Posted October 9, 2012 Report Share Posted October 9, 2012 Seems complicated, but 'strapped in" and under control... least, hope so! Link to comment
warpedbored Posted October 9, 2012 Author Report Share Posted October 9, 2012 Here's a You Tube video of one being used. Link to comment
warpedbored Posted October 15, 2012 Author Report Share Posted October 15, 2012 Yesterday I glued on the top and today I flush trimmed the back and top. Next up taking the contraption for a spin and routing the binding and purfling channels.http://oi50.tinypic.com/347gth5.jpg Link to comment
tsap seui Posted October 16, 2012 Report Share Posted October 16, 2012 I finished the rest of the contraption today. The carriage that holds the guitar straight up and down while cutting the binding channel.http://oi48.tinypic.com/rjijjk.jpg http://oi46.tinypic.com/312hkr4.jpg Really incredible stuff Carl....from jigs to holders, tools, and I guess the guitar itself. From a guy like me, the guitar itself is almost another subject unto itself. The jigs, etc are artwork within themselves...LOL tsap seui Link to comment
warpedbored Posted November 18, 2012 Author Report Share Posted November 18, 2012 Got the binding and purfling on the body. A little more quality time with a scraper and the body will be nearly finished. Next up the neck.http://oi49.tinypic.com/6xssrb.jpg Link to comment
knloregon Posted November 19, 2012 Report Share Posted November 19, 2012 Wow, Carl ~ ! its shaping up to be a very beautiful thing ~ ! Link to comment
warpedbored Posted November 19, 2012 Author Report Share Posted November 19, 2012 Sanded, scraped and a wash coat of shellac applied. Binding and purfling are done. Now back to the neck.http://oi47.tinypic.com/nzhv7p.jpg http://oi48.tinypic.com/2yjq4wh.jpg Link to comment
chilton747 Posted November 19, 2012 Report Share Posted November 19, 2012 Looking very good Carl!!!.. Love that natural finish. Link to comment
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