Search found 545 matches

by johnparchem
Tue Jun 03, 2014 1:24 am
Forum: Instrument Builders Forum
Topic: First build - split in back due to humidity :-(
Replies: 32
Views: 28581

Re: First build - split in back due to humidity :-(

Nice joinery! Great repair.
by johnparchem
Wed May 28, 2014 11:17 pm
Forum: Instrument Builders Forum
Topic: Help the router slipped.
Replies: 11
Views: 11313

Re: Help the router slipped.

Thanks guys. Pretty frustrating I just got the box closed a few weeks ago, and been making various jigs to rout the end graft and bindings- first cut and the sleeve on the router slipped I can try to inlay a decorative piece in there. I was also thinking to scoop out an area around the cut and glue...
by johnparchem
Fri May 23, 2014 5:43 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Lattice kerfing router jig (Lattice English sycamore build)
Replies: 11
Views: 14231

Re: Lattice kerfing router jig (Lattice English sycamore bui

But then if John is right, and I've used the wrong units for volume and mass, then this could all still be wrong. If someone could confirm that for me I'd appreciate it! I don't see where it says which units to use so I just guessed till I got the right sort of number! :lol: ... . Any of the units ...
by johnparchem
Fri May 23, 2014 2:07 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Lattice kerfing router jig (Lattice English sycamore build)
Replies: 11
Views: 14231

Re: Lattice kerfing router jig (Lattice English sycamore bui

I get 521.74 kg/m^3 for density.

I think that your cm^3 and g are not the right units to use in the division.
by johnparchem
Thu May 22, 2014 8:16 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

Before I can really start working on the neck I needed to get the body bound and the tail wedge installed. The binding, head stock veneer and tail wedge are all cocobola. I have a thin BWB fiber purfling that matches the rosette that I am using for purfling. Normally I install the end wedge before I...
by johnparchem
Sun May 11, 2014 2:37 pm
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

Thanks Nick! I closed the box yesterday and today. I did the back first and the top today. In each case I used my radius dish as a gluing caul and cam clamps. I do not have the picture gluing on the back but the guitar was in the mold with spreaders holding the guitar square to the mold. One the bac...
by johnparchem
Mon May 05, 2014 11:28 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

I have the body components finished and am in the process of cleaning things up and fitting the top and back on to the rims. This guitar is designed to have an active back so I thinned the back down a bit more than I normally would, used the plans 3 meter radius (well I used 10 feet) and used the pl...
by johnparchem
Mon Apr 21, 2014 2:26 pm
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

I am getting close to finishing the rims. I still need to put the back in the radius dish again to clean up the kerfed linings and generally spend some quality time clean up the inside of the rims. Today I added the kerfed linings for the back, installed the side splints and manufactured and glued o...
by johnparchem
Mon Apr 21, 2014 4:14 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

Looking good John, When you insta'l the weight mounts check theyre in a spot thats easily accesible through the soundhole. On one build I stuck the mounts to far aft and screwing in the weights was a pain. Thanks, I put it down from the waist a bit. It is close to where Trevor had it in one of the ...
by johnparchem
Sun Apr 20, 2014 6:26 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

The epoxying of the neck block went OK. Everything seemed to be in the right place and glued down http://www.harvestmoonguitars.com/Gore_SS/goress%20(221).jpg http://www.harvestmoonguitars.com/Gore_SS/goress%20(222).jpg Not have a special form for gluing making laminated linings together and I decid...
by johnparchem
Thu Apr 17, 2014 7:12 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

I made a bit of progress the last few days. This post will show my work to make the neck block for the bolt on bolt off neck joint and the tail block. The tail block is glued in with LMI glue and the neck block is currently clamped up while the structural epoxy I used is curing. More about the glue ...
by johnparchem
Mon Apr 14, 2014 2:15 pm
Forum: Instrument Builders Forum
Topic: the wood well
Replies: 15
Views: 13262

Re: the wood well

I have not used them, but our state is full of huge maples. They are located in an area near the Olympic mountains. It used to be a huge logging area.
by johnparchem
Sun Apr 13, 2014 3:11 pm
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

I really should have been making the heel and tail blocks (they should have been finished a few chapters back) but I wanted to get a feel if I could pull off the laminated linings. I have a whole stack of practice sides that I bought once for bindings and linings. Included in that stack were an orph...
by johnparchem
Sun Apr 13, 2014 8:15 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

Amazingly, the guitar rims fits in the mold. I think I will find a very bendable wood for the bindings. The last one I did I used ebony, it only took 10 or so strips to bend 2 without cracking.

Image
by johnparchem
Sun Apr 13, 2014 12:54 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

I did find one reward to working outside on the pergola, a small batch of morel mushrooms for a tasty snack. http://www.harvestmoonguitars.com/Gore_SS/goress%20(151).jpg I finally made it back in the shop Friday and got the sides bent. There is a pretty tight bend for the cutaway. First I had a bit ...
by johnparchem
Thu Apr 10, 2014 2:13 pm
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

Thanks Nick! I will get to see pictures of your carbon fiber lattice braced guitar. It will be fun positioning the lattice braces on all the carbon strips, and keeping the carbon under them while you are clamping the lattice! btw, every plant you see she planted. It was just lawn when we bought the ...
by johnparchem
Thu Apr 10, 2014 1:38 pm
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

Trevor Gore wrote:
johnparchem wrote:The last few days I had to keep peace in the household come up out of the shop and install a poly-carbonate roof on our all steel pergola in my wife's garden. :|
Just box in the sides as well and call it a workshop.

She'll never know! :lol:
It would be bigger than my shop!
by johnparchem
Thu Apr 10, 2014 1:32 pm
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

Thank you Trevor, Thanks for the tip on the tails. Having the excess epoxy to float the fishtail will help. I am sure I will get cleaner with experience. I have all the templates, dishes and molds for this design, so I will make more. I will also try a classical guitar with falcate braces as well. I...
by johnparchem
Wed Apr 09, 2014 11:19 pm
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

Thanks Nick, I look forward to seeing your work.

Trevor, I still need some practice with the epoxy I think I got it on nearly everything. The braces do seemed glued down and the top feels like a braced top.
by johnparchem
Tue Apr 08, 2014 2:11 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

Here is the completed top bracing, now on to building a guitar to use it.

Image
by johnparchem
Mon Apr 07, 2014 1:13 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

I carved out a caul for the upper transverse brace with a cabinet scraper. The caul was 400mm long and was dished to about 1.4 mm flattened in the fret board extension area. It seemed like around 40' radius with the fret board area flattened. I planed in the profile to the brace and touched it up on...
by johnparchem
Sun Apr 06, 2014 11:00 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

The build book has really good picture of everything I am doing and much better descriptions. I guess if anything this blog shows a relatively novice builder going through the procedure. I carved down all the braces I have epoxied down. The falcate braces are about 7 mm around the bridge and simply ...
by johnparchem
Sat Apr 05, 2014 5:35 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

Moving on, I waited to the following morning and remove the go-bars. The brace seems to be epoxied on well and carbon stayed under brace. I can say that carbon fiber hardware with epoxy make wicked splinters. Luckily I have my magnifying glasses and some good tweezers. I cut the remaining braces and...
by johnparchem
Thu Apr 03, 2014 10:36 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

Thanks to Markus, see above I found I had a small error in my equation for plate thickness. My error basically took the diagonal stiffness measurement out of the equation give me a slightly thicker plate. So now my top plate target is 2.7 mm and my back (I want an active back) number is 2.5 mm. It d...
by johnparchem
Wed Apr 02, 2014 9:36 am
Forum: Instrument Builders Forum
Topic: Build thread for first Gore SS from the plans in the book.
Replies: 100
Views: 107910

Re: Build thread for first Gore SS from the plans in the boo

That one seems to be fixed. Well done! 8) I hadn't looked up which data (cells) you run through the formula. A very common mistake to use a wrong cell though, a simple typo I guess. The idea to use ^0.5 instead of sqrt came because I remember having gotten strange results with Excel's SQRT function...