H.R.Fisher Posted July 31, 2021 Report Share Posted July 31, 2021 Where can I find an online wood density calculator? There was one online which for some reason has been taken off. Thanks Henry Quote Link to comment Share on other sites More sharing options...
chiaroscuro_violins Posted July 31, 2021 Report Share Posted July 31, 2021 / Quote Link to comment Share on other sites More sharing options...
Don Noon Posted July 31, 2021 Report Share Posted July 31, 2021 For the equationally challenged, starting with a uniform wedge: density in g/cc = mass(g), divide by length (cm), divide width (cm). divide by the average of the thick edge and thin edge (i.e. thick/2 + thin/2) also in cm. Quote Link to comment Share on other sites More sharing options...
uncle duke Posted July 31, 2021 Report Share Posted July 31, 2021 Making the Violin website under the tools section is still there. I didn't try it out though. Quote Link to comment Share on other sites More sharing options...
Violadamore Posted July 31, 2021 Report Share Posted July 31, 2021 For those who are both equationally and verbally challenged (as well as baffled by search engines), here's a selection: https://www.timberpolis.com/calc-timber-weight.php https://www.timberaid.com/calculator/fundamental/density ttps://www.easycalculation.com/physics/classical-physics/density-wood-calculator.php [Cuts a 1 cm cube from a block of wood, tosses it on a scale, and mutters, "Who needs a calculator?"] Quote Link to comment Share on other sites More sharing options...
H.R.Fisher Posted July 31, 2021 Author Report Share Posted July 31, 2021 I was looking for the simplistic version where you just fed in the dimensions and the weight and the answer would come up. Quote Link to comment Share on other sites More sharing options...
Davide Sora Posted July 31, 2021 Report Share Posted July 31, 2021 1 hour ago, H.R.Fisher said: I was looking for the simplistic version where you just fed in the dimensions and the weight and the answer would come up. http://www.makingtheviolin.com/Specific gravity calculator# Quote Link to comment Share on other sites More sharing options...
H.R.Fisher Posted July 31, 2021 Author Report Share Posted July 31, 2021 Yes, Thanks Davide, Thats what i was looking for. Quote Link to comment Share on other sites More sharing options...
chiaroscuro_violins Posted July 31, 2021 Report Share Posted July 31, 2021 / Quote Link to comment Share on other sites More sharing options...
charliemaine Posted July 31, 2021 Report Share Posted July 31, 2021 http://www.fiolinmaker.no/tips-triks.php?uside=eigenvekt.no&flagg=no Quote Link to comment Share on other sites More sharing options...
JPherson Posted July 31, 2021 Report Share Posted July 31, 2021 Quick question about measuring cello tops/backs. I don’t have a scale that will go high enough for the front or back. Would taking a smaller chunk off the wedge give the accurate results or at least accurate enough? Jesse Quote Link to comment Share on other sites More sharing options...
uncle duke Posted July 31, 2021 Report Share Posted July 31, 2021 Yes, it will work, just make the shape similar to what is shown. Quote Link to comment Share on other sites More sharing options...
JPherson Posted July 31, 2021 Report Share Posted July 31, 2021 47 minutes ago, uncle duke said: Yes, it will work, just make the shape similar to what is shown. Great thanks! Quote Link to comment Share on other sites More sharing options...
jezzupe Posted August 1, 2021 Report Share Posted August 1, 2021 23 hours ago, Violadamore said: For those who are both equationally and verbally challenged (as well as baffled by search engines), here's a selection: https://www.timberpolis.com/calc-timber-weight.php https://www.timberaid.com/calculator/fundamental/density ttps://www.easycalculation.com/physics/classical-physics/density-wood-calculator.php [Cuts a 1 cm cube from a block of wood, tosses it on a scale, and mutters, "Who needs a calculator?"] well, but what do I do, play pinball all day? Quote Link to comment Share on other sites More sharing options...
Andreas Preuss Posted August 1, 2021 Report Share Posted August 1, 2021 On 7/31/2021 at 9:43 AM, chiaroscuro_violins said: On 7/31/2021 at 10:33 AM, Don Noon said: For the equationally challenged, starting with a uniform wedge: density in g/cc = mass(g), divide by length (cm), divide width (cm). divide by the average of the thick edge and thin edge (i.e. thick/2 + thin/2) also in cm. This is always for the overall average relative weight. It works for maple but in spruce there seem to be variations within a wedge. It is possible that the wood density variation is important too. Quote Link to comment Share on other sites More sharing options...
Don Noon Posted August 1, 2021 Report Share Posted August 1, 2021 1 hour ago, Andreas Preuss said: This is always for the overall average relative weight. It works for maple but in spruce there seem to be variations within a wedge. It is possible that the wood density variation is important too. Yeah, but since most of us don't have a CT scanner handy to check for local density variations, this is about all we deal with. Visually, there can be clues... i.e. wide dark fall growth rings indicating higher density. I wouldn't mind such grain at the edges of a plate, but not along the center. Quote Link to comment Share on other sites More sharing options...
Andreas Preuss Posted August 1, 2021 Report Share Posted August 1, 2021 9 hours ago, Don Noon said: Yeah, but since most of us don't have a CT scanner handy to check for local density variations, this is about all we deal with. Visually, there can be clues... i.e. wide dark fall growth rings indicating higher density. I wouldn't mind such grain at the edges of a plate, but not along the center. You can cut test pieces from inside and at the border. (Mine are 200x20x5) I usually take the inside piece as a reference. Because you need to split it off in the inside, It gives also a pretty precise view on how the grain runs in that critical area. if you have a very thick wedge you could also slice off 5mm with a band saw on the whole surface and take it as a reference. ——————————— Which grain structure is best in which place is usually answered by the wedge and the outside of the tree faces the joint anyway, and accordingly hard and wide yearrings from the inside of the tree automatically fall at the border. It might be more crucial how much you angle the yearrings to the plane of the underside. Quote Link to comment Share on other sites More sharing options...
RuthCamp Posted February 7, 2022 Report Share Posted February 7, 2022 On 7/31/2021 at 6:52 PM, Davide Sora said: http://www.makingtheviolin.com/Specific gravity calculator# Thanks for the link. I am also searching for it online. Quote Link to comment Share on other sites More sharing options...
Davide Sora Posted February 7, 2022 Report Share Posted February 7, 2022 22 minutes ago, RuthCamp said: Thanks for the link. I am also searching for it online. You're welcome Here is another one, a little more refined: http://www.fiolinmaker.no/tips-triks.php?uside=eigenvekt.en&flagg=en Quote Link to comment Share on other sites More sharing options...
violins88 Posted February 7, 2022 Report Share Posted February 7, 2022 If the sides of your piece of wood are flat, simply locate the center by drawing straight lines from corner to corner diagonals. Measure (centimeters) the thickness at the center. Measure (cm) length and width (cm) at this center. Now calculate Volume = L x W x H density = mass/volume where mass is in grams and volume is in cu.cm Water has a density of 1 gram per cu.cm. Quote Link to comment Share on other sites More sharing options...
violins88 Posted February 7, 2022 Report Share Posted February 7, 2022 On 11/9/2021 at 6:14 PM, JacksonMaberry said: I've read the density of black maire can be up around 1.00, with Southern Rata getting close on occasion to 1.2. I'm thinking bow wood depending on speed of sound and other factors. Any possibility of getting ahold of Southern Rata boards suitable for bow blanks, John? I will try. This is an interesting case because the shipping rate will be high. Except bowmakers will be willing to wait 6 months or more, therefore possibly obtaining lower rates. I would just have to find someone who is moving to the USA and send a shipping container. Also assuming there are no import restrictions on southern Rata. Quote Link to comment Share on other sites More sharing options...
RuthCamp Posted February 14, 2022 Report Share Posted February 14, 2022 (edited) On 2/7/2022 at 3:43 PM, Davide Sora said: You're welcome Here is another one, a little more refined: http://www.fiolinmaker.no/tips-triks.php?uside=eigenvekt.en&flagg=en Thanks for the link. I am also looking for the density calculator which I have found in your given link. Edited March 14, 2022 by RuthCamp Quote Link to comment Share on other sites More sharing options...
GeorgeWilliams Posted March 19, 2022 Report Share Posted March 19, 2022 (edited) On 2/7/2022 at 3:43 PM, Davide Sora said: You're welcome Here is another one, a little more refined: http://www.fiolinmaker.no/tips-triks.php?uside=eigenvekt.en&flagg=en I have just tried and I was so impressed it actually works. Thank you Davide Sora. I always try to find educational sites online in which I can find free stuff. Edited May 18, 2022 by GeorgeWilliams Quote Link to comment Share on other sites More sharing options...
charliemaine Posted March 19, 2022 Report Share Posted March 19, 2022 On 7/31/2021 at 9:08 AM, charliemaine said: http://www.fiolinmaker.no/tips-triks.php?uside=eigenvekt.no&flagg=no On 2/7/2022 at 2:13 AM, Davide Sora said: You're welcome Here is another one, a little more refined: http://www.fiolinmaker.no/tips-triks.php?uside=eigenvekt.en&flagg=en When David Sora speaks....people,....listen Thank you Salve! Quote Link to comment Share on other sites More sharing options...
JacksonMaberry Posted March 19, 2022 Report Share Posted March 19, 2022 On 2/7/2022 at 7:13 AM, violins88 said: I will try. This is an interesting case because the shipping rate will be high. Except bowmakers will be willing to wait 6 months or more, therefore possibly obtaining lower rates. I would just have to find someone who is moving to the USA and send a shipping container. Also assuming there are no import restrictions on southern Rata. No pressure, it was just a thought. If you happen to chance upon a small board, maybe enough for a couple bows, shoot me a message. Thanks! Quote Link to comment Share on other sites More sharing options...
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