Fretting (6)

string tension

I just recently finished a 3 string and it seems like the strings are a little hard to fret. I have it set up on a 25 inch scale, if I move the bridge toward the neck will it make the strings easier to fret without sacrificing tone quality? It plays great with a slide. I am also wondering if I might have the frets set too low. I am using an 8/32 bolt for the bridge and a bit smaller bolt for the nut.

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My fret slot cutting setup

9353891896?profile=originalI thought I'd document my method for cutting fret slots. Disclaimer: This is how I do it. BE SAFE. Follow your tools' directions. I'm not responsible for your accidents or bad decisions. In fact, DON'T DO THIS. 

Are we good now?

SoI started with a shopmade miter box and a Harbor Freight pull saw, as shown above. I actually like that other saw better as the back is reinforced. Anyhow, what you can't really see in that miter box is that there's the spine of a utility knife blade sticking up there. It's the same thickness as the saw kerf and registers the kerfs cut into the templates, above. Two of the templates I laid out with 12" digital calipers; one I made using an actual Martin fretboard and the method below, using the fretboard as the template and the template material as the workpiece. I hope that makes sense. 

To make a fretboard I'd affix the fretboard blank to the BACK of the appropriate template, then slide the template down onto the knife blade, then make my cut with the saw. No depth stop, meaning some trial and error and tweaking to get the depths somewhere in the neighborhood of right.

Not ideal. So recently I ordered a Stewmac tablesaw blade ground to the right thickness for fretwire. It was expensive, but using the templates I made and a dedicated table saw sled, I can cut a fretboard relatively quickly. 

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That's the bottom of the sled. I used a couple of those Microjig runners I had. They're great, but you don't need them. That saw blade's only 6" in diameter, as you can see, and it burns readily. 

9353894061?profile=originalThere's the sled, shown from the far side of the table saw. As you can see, I went with the utility knife again to register the template. It works a lot like a box joint jig, but you need to pay attention to your zero fret location. I used the end of the template when I made mine, but you'd be better off making it a slot and either using a zero fret (I've never done this) or cutting it off at that point. You'll figure it out. 

In this configuration I glue the template on its side to the back of the fretboard blank. The knife is raised up in the registration slot so that the fretboard material sits under it. 

9353894298?profile=originalHere's the view from the user's perspective. The template is taped to the walnut fretboard. To cut, you line the kerf in the template up with the utility knife blade (it's in the little slot to the left in the greenish poplar piece; the slot next to it is where the blade actually cuts. So you just work your way from one end of the template to the other, and it goes very quickly. Just remember that the slot depth equals the height of the blade sticking up past the bed of the sled (I used 1/4" tempered hardboard). Also remember that the blade is going to come out the back of your sled ... BE CAREFUL. All the slots are uniform, you only have to measure once, and you're moving on in minutes.

I hope this helps somebody. I didn't invent any of this; at most I adapted it from the video on the Stewmac site since I wanted to use my own templates and not pay for theirs, which are surely more accurate than my handmade ones. 

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Dear team

After many failed attemps at fretting I am planning to try again and after some help.

 

1) What is the best fret wire to use?

 

2) What's the best scale length to use?

 

3) What is any string height compensation required against scale length?

 

4) Could I be using incorrect strings and will that make a huge difference?

 

What is the trick to making these work and play well?

 

Your help is greatly appreciated.

Mr Bug

 

(This is clever on an old banjo I have for just an interesting photo, note brass tube to typical 6 string tuners one not used, I kept my kids tooth to make a banjo nut from shhhh dont tell the tooth fairy)

 

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Fretting: the fun stuff

Fretting seems to be one of those things about building that a lot of folks dread....I find it to be one of the best parts of building along with carving the neck; both are very rewarding upon completion. In the moment, I will sometimes wonder why I don't just take a Sharpie, mark the frets with it, raise the action, and play it with a slide. But after a good fret job, I feel great. Here's the way I do it and some things I've found to make it easier. If you have any other tips, please let me know.

I used to use a variety of scale lengths for my CBG's. I was all over the place. And that way lead to madness and frustration. I've settled in on a 23.5 (Byrdland) scale, 20 1/8, and a 17" scale. The latter two are Ukulele scales. I have yet to make a Uke but will be ready with those two options when that day comes. Because of the antique boxes I use, I prefer these smaller scales. The guitar seems to have a balanced look; rather than having a long, long stick jutting out of a tiny box. The madness part of too many scales comes from selecting (and buying) strings for the variety of lengths. String gauge needs to be matched up with scale length. I went thru a load of strings trying to get them to sound right up and down the scale. What sounds good at the top of the neck does not stay tuned as you proceed down the neck. Here's the string tension calculator I use: http://www.mcdonaldstrings.com/stringxxiii.html

A great scale calculator can be found (like the above; for free) on the Stew Mac site: http://www.stewmac.com/freeinfo/Fretting/i-fretcalc.html

I put frets on very early in the build. Once the neck stock is sized, I begin to layout the guitar. Measuring from the top, I measure the length needed for the headstock, locate the nut, mark the distance from nut to bridge, and then figure where the box top and bottom will be. I tend to put the bridge about 1/3 the box length up from the bottom. I read that that was a good position and gives the best resonance. I may have dreamed it to, who knows.

I'll then cut the angle for the headstock, make the cuts for the box and cut the layback angle for the box. Back on the bench, I'll begin to lay out the fret position. I use and recommend layout using millimeters. It is far more accurate and you do a lot less math: what the heck is 3.047 inches and where did you get that ruler? 

I tape the mm ruler in place and begin, making only one tiny mark for the fret position using a very sharp pencil. Sharp pencils are really important. Mechanical ones work well I suppose but I love using my antique Boston pencil sharpener. Using either my homemade mitre box or the Stew Mac version (whichever is closer), I begin to cut the frets. On the stew Mac one (an older model, I have to use a couple of shims (cut and thinned to the exact same thickness) to move the neck away from the wall. The little brass blade guides will get in the way. The mitre box is designed for thin fret boards to fit under these guides, not for thick stock CBG necks. Good point though: I use fret boards every once in a while, mostly I add frets directly to the neck,  and a lot of what I'm writing will apply to separate fret boards but only after gluing it to the neck stock.

Checking the marks, I cut the frets. I don't use depth gauges or stops on the Japanese backsaw (another Stew Mac investment but an important one for tight frets). I use the teeth as my guide. Saw to the depth of the teeth. If the teeth are not visible in the cut, that's deep enough. 

I like to lightly sand the fret board once all the frets have been cut. With sandpaper glued to extremely flat scrap thick wood, I will sand lightly from 120 to 400 grit and top off with steel wool. This will give the fretboard an incredibly smooth feel for fingers later. It's also the last chance to prep the fretboard before adding frets.  At this point you could add the frets but I taper the necks so I wait till after gluing on the headstock (angle and wings) and gluing on the brace under the box cut out for strength and stiffness. The neck taper is cut after all that.

Its a lot of back and forth in the process between the garage and the basement. My shop is in the basement and the saws are out in the garage. My basement floods every once in a while and the thought of my low mounted bandsaw motor under water just brings tears to my eyes. In case you don't know it, the bandsaw is the single best machine you will ever buy.

Now I add the frets. Clean out any dust in the groove from sanding. An old paint brush does a fine job of that. I used to re insert the fret saw and clean it out. What a waste of time that was in the past. Be sure there is support under the neck and it is held firm with clamps to you bench top. The frets tap in way tighter and eaier when the neck is firmly in contact with a solid surface, this is really important. Lay the fret wire on the leading edge of the fret and begin to tap it in as you tilt toward the far edge. Trying to hammer it in flat doesn't work well; fret grooves gets damaged or you'll dent the fret position. Let the fret wire hang over the far edge just a bit. Tap it in and trim off just the front edge. Cut off the other side later over a trash can so little tiny fret wire cutoffs don't end up on the bench top where the inevitably get pounded into the neck by accident.

Once all the frets are in and trimmed, put the neck in the vice (add wood to the jaws if you haven't already) with one side facing up.The neck should be above the jaws of the vice slightly.  Use a medium to fine flat file  and slowly and carefully file the fret wire even to the side of the neck. This is one of my new discoveries, may be old hat for a load of you. This works great and is very fast. Once it feels and sounds like the frets are even to the side, continue filing but begin to angle the file toward the fretboard. On my vice I can get about a 25 degree  angle before hitting my knuckles on some part of it. Angle as best you can. Flip and do the other side.

I have a piece of wood that I cut a 35 degree angled groove in and added a flat file using hot glue to hold it in place. This is another tool available from Stew Mac but at some point you just have to say no and build your own tools. I love the Stew Mac but they are really expensive!! Notice they never ever have a sale!? Once both sides are filed flat and angled a bit, reposition the neck in the vice so the fret board is facing up. Now I use my angled file and finish the beveling. Finish up with a light sanding of 220 sandpaper (on the bevel not the top of the wire) and then some #1 steel wool. 

That's it. Feel it. You can smooth it out further using 400 grit and finer steel wool but you know you are going to tweak it later anyway. Put the neck away and be happy with a nice job.

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Fret Scale Template-Accurate! Cheap!--How To Make

  Here's my first CB building blog. It's just a short one to get the hang of it. It's about making an accurate fret scale template for about 3$US as opposed to buying one for 40+$US. It has sub-millimeter accuracy with just a little care taken in its making. First, you need a 3$ 'Swanson' yardstick from Lowes i.e. (http://ity.im/07nkn). Of course it can be another quality brand from somewhere else as long as it has mm marked its full length. After completion of the template, it can be cut back to wahtever length you really want, the one in this blog and these pix is for a 30" Bass Scale. I like the 'Swanson' brand, I've bought 6 of them so far and have found Zero visual difference between any of them. Accurate enough I think. My frets and intonation come out near perfect so far after 23 builds.

 

On to the actual 'making':

9353744268?profile=originalHere you see I have the stick clamped against a board on my build bench.

9353744691?profile=originalI support behind the 'stick on each cut and 'guide the saw straight with a small block of hardwood.

I am using an Xacto saw blade.

The 'stick is aluminum and does not hurt the blade much.

I've used this blade for 20 years or more for wood, aluminum and brass.

9353745282?profile=originalAfter cutting the notches to about 1/8" or so (doesn't matter as long as you can see them) I highlight the marks in red Sharpie. I check and double check against my fret table (I use mm for frets) before each cut. I try to get as close to .5mm or .3mm or .7mm as possible when cutting between the full mm marks. I have created a plastic 'slide-guide' that is cut out the thickness of the 'stick on one side to help with parallax error since the 'stick is pretty thick.

9353745090?profile=originalHere you can see how the plastic slide-guide rests on the 'stick and on the fretboard itself.

9353746265?profile=originalThe red marks are easy to find and the little slot acts as a natural stop for the slide.

9353746095?profile=originalBut I find this to be the easiest method. Flip the 'stick over!! The 'stick is plain on the back! Straight and smooth!

I find my next slot with the Xacto #11 knife,

9353746875?profile=originalSlide the guide up to the knife, then

9353746675?profile=originaldraw the blade out of the slot on the 'stick and along the guide for a great, thin, easy to find fret position mark.

After all the frets are marked, I put the Xacto blade in the knife mark and slide a small 4" square up to the blade and mark a line all the way across the fret board for the fretsaw to follow. The saw follows the knife blade mark very well.

9353747298?profile=originalJust an overall shot of the simple to make and best of all CHEAP $3 fret scale with sub mm accuracy!!

Best of all, since they are only 3$, you can make a different one for every scale, 25 inch for guitar, 13-15-17-20 inch for ukes and 30-34 inch for bass and still  have less than 25$US all told! Way less than one scale template from a luthier supply store and way better than a printed paper template. I can mark a 20 fret 30 inch bass neck in about 30 seconds now with real good accuracy and total repeatability. And since there is a spare edge the 'stick could be used for a second scale but I like a separate 'stick for each scale to keep from confusing myself (pretty easy) and since they're only 3$US how can you go wrong!

 

Hope this can help some of you builders out there, especially the newer ones who haven't figured out all these handy tools and jigs that help us build better!

All comments welcome and anyone with a suggestion to improve this type template or this blog, please jump right in and share with us all.

Thanks for looking my blog over.

DrByte.

 

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Once i sanded my fretboards how i like them I pressed and trimmed the frets

The pictures tell the story. I used to hammer the frets in  but that was a pain in the ass so I made this press. and Also made a few blocks and shims so I can press all the frets up to the high end.notice how I turned my kitchen table into my workshop. this makes my wife so happy.....not.        

 

dig the blurry pics

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I use a pair of flush cut nippers to trim the ends close so i don't have to file so much.




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Brick chisel. I layed about a million bricks in the front of my house with this in it's first life.
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