How to work out the "run out" of the harmonic and back bars.
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- čas přidán 11. 06. 2024
- The run out of the harmonic and back bars is an important characteristic to take into account. In this video I explain how you can work it out.
If you would like to learn these techniques in person you can join one of my guitar making courses. All the info is on: guitarmakingcourse.org
Alternately if you want to build your own guitar in your own workshop at home you can do it with my course on video format that you can find on: onlineguitarmakingcourse.com
Muchas gracias, Pablo.
A mí, como aficionado, me enriquecen muchísimo tus conocimientos de experto que, entre paréntesis, no es fácil que alguien los comparta.
Saludos desde México.
gracias Pablo! siempre aprendiendo contigo, saludos.
Thank you for the clarifying this, great video again 😊
Very helpful as always. Thank you Pablo!
Runout is an important issue that is often overlooked. The same issue appears in the soundboard thanks to all mayor suppliers who refuse to split their quarters before sawing the soundboards.
Thank you, Pablo for this detailed information about “run out”. this is something I have heard about but didn’t know how to find it in the brace pieces for my guitars. We can always make our building better, you have just helped us to do that.
Excellent video Pablo. This validates what I learned while building my latest guitar, having paid much more attention to splitting and selecting brace wood than previously done. Thank you!
thanks Pablo!
Awesome info!
I think several luthiers have used harmonic bars with the grain running horizontally instead of perpendicular.
I was wondering if measuring the bending strength (simple three point) could tell me if the bars have a lot of runouts?
Even if the bar is strong to the bend if the grain runs out badly you could end up with problems in the future.
@@redkitekk agree that there would be a problem if there are runouts I just wonder if such a bar would show weakness in a bending test or not. if not then all we can do is carefully look :)
sorry should have started with thanking you for all the wonderful and helpful videos you are posting. i just started a French Polish following your instructions and can't wait to see the final instrument/finish. Thanks a lot!!!
@@martinjanousek6861 you are very welcome.
I am sure that if the bar is strong it will cope well and the chances are that the bar won’t break in the future. The thing is that I don’t work with those parameters so I couldn’t tell you what kind of rigidity or strength the bars need to have.
The way it works for me is that the bars need to be strong while flexible so I need to make them as small as I can get away with and for that reason I need to know the bars have very little or no run out at all. As I mentioned in the video sometimes it is possible to see the grain lines that indicates this but when these lines are not noticeable then the only way is to split the bar.
I hope this helps.
@@redkitekk thanks a lot and just finished the first session of French Polish and the instrument is starting to look beautiful. But I do need to re-sand the back :( as only now I see some scratches I don't like.