#16
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Quote:
This all came from my newly found love for the Martin's MA545 with the gauges exactly in between the lights and mediums. They go 12.5, 16.5, 25.5, 33.5, 43.5, 55 It's amazing what a great sounding strings / guitar combo can do to us. Some may even go through a refresher on physics
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#17
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What is the guitar open tuned for ? That's going to change relative for the tension of the strings for tuning, the fret that is depressed & string gauge. Neat little device.
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#18
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Now we have a new rabbit hole. Hang on!
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Waterloo WL-S, K & K mini Waterloo WL-S Deluxe, K & K mini Iris OG, 12 fret, slot head, K & K mini Follow The Yellow Brick Road |
#19
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Decided to do a quick formula calculation.
Was too lazy to do exact Young's modulus research, so found this I decided to use 200. As we will see later, id does not matter. Then found the tension data Then measured the string length (the distance from the saddle to the 3-rd fret location I used to fret the strings it is 55cm or .55m Then measured the G string height above the 3rd fret and it is 2.3mm or .0023m Then I averaged the tension data for my strings which are in between the light and medium. Then I did a quick calculations: If you reading the calculations, please note that due to the Alpha angle being very small, the formula is much simplified. Unfortunately, it does not work. I calculated the Fretting force for G string and calculated the adj. coefficient to match measured .49 lb. Then using Tension data for e string and B strings I calculated adjusted force for those and they did not match the measurement. Perhaps the formula I found on the electric guitar forum is incorrect, or the tension is incorrect etc. BTW, if you look at the tension data, you will see that tension for B string is less than tension for e string, while the force is proportional to the tension according to the formula. That means that B string force should be less than e string force, which itself contradicts my measurements.
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Liberty is the only thing you cannot have unless you are willing to give it to others. (c) Sage of Emporia |
#20
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Good thread and idea, but pounds?
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Current: 2009 Esteve 8 EIR/Romanian Spruce 2001 Fender Stratocaster vintage '62 Upcoming: Sundberg 000-28 12 fret EIR/Sitka Sold: 2014 Lowden F25 Custom 2008 Taylor GC8 2006 Taylor GS6e My John Renbourn tribute |
#21
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FYI - These are also available in case others want a cheaper option. Very basic, uses a spring where the Mxmoonfree probably uses an electronic load cell. They don't give accuracy data but sensitivity data should be valid:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 It would be interesting to determine the push sensitivity to string action (height). For example, if you lowered E action from .1" to .09", how much would the push force decrease? You could potentially do this without adjusting the actual action on the guitar by placing thickness gauges on top of the fret.
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OM-28 Marquis (2005) Kenny Hill Player (nylon) Gibson AJ (2012) Rogue Resonator (kindling) |
#22
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Liberty is the only thing you cannot have unless you are willing to give it to others. (c) Sage of Emporia |
#23
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Why not Stones?
What I'd like to measure is the change in fretting pressure going from high tension to medium or low tension (this is on nylon), also standard tuning vs. a half or full step down, also high frets vs. low frets. I'm not sure I am following your calculations correctly, but if it is showing a G string tension of ~32N, 7 lbs, that seems far too low. I'd believe 32 lbs maybe. Even nylon strings are around 14 - 17 lbs. |
#24
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Quote:
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#25
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Many factors in playability including fret height, width and crown shape - for example somewhat paradoxically quite low fret height is a problem in an effort to play cleanly.
Then how far fretting finger is from fret (even in the photos shown there is a significant diffeerence). Etc...
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#26
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Quote:
My tension data is from this averaged for the light-medium 12.5 set I use. It's great you posted, as I assumed (perhaps wrongly) that the units used in the table were Newtons (as this is common SI unit for tension). You confirmed with your knowledge then that the table is in pound force. So T used should be left at 32.7 and the F for G string calculated by the formula then of 0.137 Lb. However, due to the linear dependency on T, it would only affect the adj.coefficient to meet measured force of 0.49 Lb (k=3.554 now) and would not affect overall results and mismatch of the the formula vs measurements.
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Liberty is the only thing you cannot have unless you are willing to give it to others. (c) Sage of Emporia |
#27
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Quote:
Please see circled in red. The only thing that is different is that I introduced the K multiplier to meet the measured force for G string in a hope that then the formula results for the other two would also meet the measurements. Unfortunately, they don't. P.S. and the biggest issue is that my measurement shows B string force of 0.44 Lb i.e. higher than the e string force of 0,41 Lb while T from the table shows LOWER T for the B string vs e string. So that means that either the T table is incorrect, or the formula could not be linear for T, or my measurements are wrong (which I do not think).
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Liberty is the only thing you cannot have unless you are willing to give it to others. (c) Sage of Emporia Last edited by Gress; 05-04-2024 at 06:19 PM. |
#28
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Where does your G-string tension of 7.35 lbs come from? Is that supposed to be a normal G-string tuned to pitch w/o fretting it?
Keep in mind that your gauge accuracy is +/- 0.11 lbs: 1% of full scale.
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OM-28 Marquis (2005) Kenny Hill Player (nylon) Gibson AJ (2012) Rogue Resonator (kindling) |
#29
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Quote:
https://www.acousticguitarforum.com/...9&postcount=26 On the accuracy, my accuracy of measuring is worse than that
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Liberty is the only thing you cannot have unless you are willing to give it to others. (c) Sage of Emporia |
#30
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This all sounds very familiar...
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