Hi All, With Glenn Reithers permission I am reposting his thoughts on fret calculation (from a facebook conversation) here so more people can get benefit from it.

The Readers Digest Version: Use the ExMi online fret calculator. It has a stretch compensation option that is perfect for high actions. I always use it. And yes, stepped bridges solve a lot of issues. 


The reasoning behind it: When I say high I mean higher than what you find on a Strat, not lap steel high. My answer to your question is that it makes it more slide-friendly while still being finger friendly. And most people are building with larger tolerances than what Fender or Gibson are - it's a rustic instrument after all - so a higher action means their frets are less likely to buzz. And because cbg's aren't as loud as a big body acoustic, you tend to dig in more with the strumming hand and that might mean fret buzz especially on lighter gauge strings. Even a low action will have a stretch factor its intonation. I'd love a calculator that has an action height component. My low action action would be 2mm at the 17th fret, but that was on a double neck that had a a slide twin on a very high action so I could assume you wouldn't play slide on the low action fretted neck. The highest playable and in tune action I've done was 5.5mm at the 17th fret. Yeah, it's very high. But with the stretch compensated fretting it plays in tune nicely.

‎"even though you play slide, you still want to play up and down the fingerboard fretting notes and chords too" Exactly. That's why I use the ExMi calculator with stretch compensation. You want an action that is high enough to play slide without clacking on frets all the time, but not so high that that the act of clamping down on a string alters the string tension so much that it plays sharp. With a stretch compensation factor in your fret scaling you can set the action quite high and still be in tune.

By the way, I didn't use stretch compensation on the aforementioned low action neck. The stretch compensation would have made some notes flat.

An interesting side note to this. The difference between the normal fret scale and the stretch compensated one is up to 1.5mm, which would be a huge error when cutting fret slots. That taught me to not obsess about fret scales that go to 3 decimal point. I just round to the nearest 0.5mm now.

Views: 731

Replies to This Discussion

Thanks for sharing

It was too good not too. I'm not sure if this will work but here is a PDF of his guide to Fretting.

Funny and informative.

Attachments:

Wow, thanks again!  You are awesome.

Hey I'm just the messenger it is all Glenn Reithers work. He is on this site and I believe posted it before..

RSS

The Essential Pages

New to Cigar Box Nation? How to Play Cigar Box GuitarsFree Plans & How to Build Cigar Box GuitarsCigar Box Guitar Building BasicsCigar Box Guitar Parts Store

Site Sponsor

Recommended Links & Resources


Discussion Forum

Fret template

Started by Randy Drysdale. Last reply by Tim Pannabecker Jan 28, 2019. 6 Replies

String gauge for 20" - GDG

Started by jawbone. Last reply by Uncle Fred Sep 22, 2014. 7 Replies

Cura saz scale length

Started by Cin wel. Last reply by Cin wel May 25, 2013. 4 Replies

fretfind

Started by Mike Sibinga. Last reply by wormil Jan 12, 2013. 3 Replies

Fret marking method

Started by Jillian Holladay. Last reply by wormil Jun 4, 2012. 2 Replies

Reverse calculations

Started by Martyn Hartley. Last reply by Martyn Hartley Apr 22, 2012. 2 Replies

Fret placement and stretch compensation - by Glenn Reither

Started by Penny Nelson. Last reply by Penny Nelson Apr 17, 2012. 4 Replies

Question on Scale Length

Started by Waid Jones. Last reply by Steve wootten Apr 16, 2012. 2 Replies

Scale length vs tuning note

Started by Matt Quinney. Last reply by Rand Moore Jul 16, 2011. 3 Replies

ukulele fret measurement

Started by ukeplayer. Last reply by Steve Pollack Mar 20, 2011. 6 Replies

String FAQ - let's get it going!

Started by Mama Mojo. Last reply by Mark Mercer Jan 27, 2011. 6 Replies

neck widths

Started by Bob Young. Last reply by Chuck Dubman Jan 23, 2011. 2 Replies

3 string guitar string gauges

Started by Bob Young. Last reply by DrByte Jul 22, 2010. 3 Replies

New things you can do with a guitar fret template

Started by Alan Roberts. Last reply by Chuck Dubman Mar 28, 2010. 5 Replies

longer box, shorter neck?

Started by Peter Taylor. Last reply by Pineee Johnny Feb 25, 2010. 3 Replies

violin Tailpiece??

Started by Penny Nelson. Last reply by Wichita Sam Jan 3, 2010. 1 Reply

Blog Posts

Leonard Cohen Life

Posted by Keith Rearick on October 7, 2021 at 11:18am 0 Comments

CBGer’s Lament

Posted by Ghostbuttons on October 3, 2021 at 12:11am 0 Comments

Sasquatch!

Posted by Mark E. Martinsen on September 29, 2021 at 8:39pm 3 Comments

Prototyping with a big ol' wine box

Posted by Ben on September 23, 2021 at 4:00pm 0 Comments

Mr. Bells

Posted by Stephen Cohen on September 4, 2021 at 12:30pm 0 Comments

Latest Activity

Jack Gray posted a discussion

Anyone in or near Fayetteville, NC area building CBG’s? other than me.

Hello, anyone in the Fayetteville, NC area building CBG’s?other than me. Thanks……..JackSee More
2 hours ago
Chuck Hunsinger commented on Uncle John's video
2 hours ago
BrianQ. left a comment for Jimbo
"Welcome, check out the Resources tab for build/play info and join some groups located in the Posts…"
3 hours ago
Profile IconJimbo, Bob Doyle and Jurgs joined Cigar Box Nation
5 hours ago
A.D.EKER commented on A.D.EKER's video
5 hours ago
A.D.EKER posted a video

Kind hearted Woman R. Johnson - A. D. Eker 2021

Something you whish for but dont allways meet, usely they are Dragons who try to suck you dry ,or mentaly hurt you by loving you not for what you are ,or do...
5 hours ago
3 String Blues commented on 3 String Blues's photo
Thumbnail

who can relate???

"yes lots of kids come here and my site!"
6 hours ago
Thomas "Duck" Petry commented on the anonymous pick's photo
Thumbnail

swamp witch guitars arsenal 5

"Nice job Mr. Pick. Looks like someone built it down in the mining camp."
6 hours ago
BrianQ. commented on Uncle John's photo
Thumbnail

Banjo on my Knee -stolen from AGP- please do not tell him.

"Good one, I used to look forward to reading the Far side in the Sunday paper :)"
6 hours ago
BrianQ. commented on Randy S. Bretz's photo
7 hours ago
BrianQ. liked Randy S. Bretz's photo
7 hours ago
AGP # commented on AGP #'s photo
Thumbnail

AGP #446 - ''Jolly Jumbuck''

""Thanks UJ", Yep!, slowly getting the hang of it, should have it down pat after another…"
8 hours ago

Music

© 2021   Created by Ben "C. B. Gitty" Baker.   Powered by

Badges  |  Report an Issue  |  Terms of Service

\uastyle>\ud/** Scrollup **/\ud.scrollup {\ud background: url("https://storage.ning.com/topology/rest/1.0/file/get/963882636?profile=original") no-repeat scroll 0 0 transparent;\ud bottom: 25px;\ud display: inline !important;\ud height: 40px;\ud opacity: 0.3 !important;\ud position: fixed;\ud right: 30px;\ud text-indent: -9999px;\ud width: 40px;\ud z-index: 999;\ud}\ud.scrollup:hover {\ud opacity:0.99!important;\ud}\ud \uascript type="text/javascript">\ud x$(document).ready(function(){\ud x$(window).scroll(function(){\ud if (x$(this).scrollTop() > 100) {\ud x$('.scrollup').fadeIn();\ud } else {\ud x$('.scrollup').fadeOut();\ud }\ud });\ud x$('.scrollup').click(function(){\ud x$("html, body").animate({ scrollTop: 0 }, 600);\ud return false;\ud });\ud });\ud \ua!-- End Scroll Up -->